炭酸ナトリウム

WordNet

turn into a carbonate
a salt or ester of carbonic acid (containing the anion CO3)
treat with carbon dioxide; "Carbonated soft drinks"
a silvery soft waxy metallic element of the alkali metal group; occurs abundantly in natural compounds (especially in salt water); burns with a yellow flame and reacts violently in water; occurs in sea water and in the mineral halite (rock salt) (同)Na, atomic number 11
having carbonation (especially artificially carbonated)

PrepTutorEJDIC

炭酸塩 / …'を'炭酸塩化する,炭酸で飽和させる / …'を'炭化させる
ソジウム,ナトリウム(金属元素;化学記号はNa)
炭酸ガスを含む

Wikipedia preview

出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2016/01/24 02:00:25」(JST)

wiki en

Sodium carbonate (also known as washing soda, soda ash and soda crystals), Na₂CO₃, is the water-soluble sodium salt of carbonic acid.

It most commonly occurs as a crystalline heptahydrate, which readily effloresces to form a white powder, the monohydrate. Pure sodium carbonate is a white, odorless powder that is hygroscopic (absorbs moisture from the air). It has a strongly alkaline taste, and forms a moderately basic solution in water. Sodium carbonate is well known domestically for its everyday use as a water softener. It can be extracted from the ashes of many plants growing in sodium-rich soils, such as vegetation from the Middle East, kelp from Scotland and seaweed from Spain. Because the ashes of these sodium-rich plants were noticeably different from ashes of timber (used to create potash), they became known as "soda ash".^[12] It is synthetically produced in large quantities from salt (sodium chloride) and limestone by a method known as the Solvay process.

Uses

The manufacture of glass is one of the most important uses of sodium carbonate. Sodium carbonate acts as a flux for silica, lowering the melting point of the mixture to something achievable without special materials. This "soda glass" is mildly water-soluble, so some calcium carbonate is added to the melt mixture to make the glass produced insoluble. This type of glass is known as soda lime glass: "soda" for the sodium carbonate and "lime" for the calcium carbonate. Soda lime glass has been the most common form of glass for centuries.

Sodium carbonate is also used as a relatively strong base in various settings. For example, it is used as a pH regulator to maintain stable alkaline conditions necessary for the action of the majority of photographic film developing agents. It acts as an alkali because when dissolved in water, it dissociates into the weak acid: carbonic acid and the strong alkali; sodium hydroxide. This gives sodium carbonate in solution the ability to attack metals such as aluminium with the release of hydrogen gas.^[13]

It is a common additive in swimming pools used to neutralize the corrosive effects of chlorine and raise the pH.

In cooking, it is sometimes used in place of sodium hydroxide for lyeing, especially with German pretzels and lye rolls. These dishes are treated with a solution of an alkaline substance to change the pH of the surface of the food and improve browning.

In taxidermy, sodium carbonate added to boiling water will remove flesh from the skull or bones of trophies to create the "European skull mount" or for educational display in biological and historical studies.

In chemistry, it is often used as an electrolyte. Electrolytes are usually salt-based, and sodium carbonate acts as a very good conductor in the process of electrolysis. In addition, unlike chloride ions, which form chlorine gas, carbonate ions are not corrosive to the anodes. It is also used as a primary standard for acid-base titrations because it is solid and air-stable, making it easy to weigh accurately.

Domestic use

It is used as a water softener in laundering: it competes with the magnesium and calcium ions in hard water and prevents them from bonding with the detergent being used. Sodium carbonate can be used to remove grease, oil, and wine stains.

In dyeing with fiber-reactive dyes, sodium carbonate (often under a name such as soda ash fixative or soda ash activator) is used to ensure proper chemical bonding of the dye with cellulose (plant) fibers, typically before dyeing (for tie dyes), mixed with the dye (for dye painting), or after dyeing (for immersion dyeing).

Sodium carbonate test

The sodium carbonate test (not to be confused with sodium carbonate extract test) is used to distinguish between some common metal ions, which are precipitated as their respective carbonates. The test can distinguish between Cu, Fe, and Ca/Zn/Pb. Sodium carbonate solution is added to the salt of the metal. A blue precipitate indicates Cu²⁺ ion. A dirty green precipitate indicates Fe²⁺ ion. A yellow-brown precipitate indicates Fe³⁺ ion. A white precipitate indicates Ca²⁺, Zn²⁺, or Pb²⁺ ion. The compounds formed are, respectively, copper(II) carbonate, iron(II) carbonate, iron(III) oxide, calcium carbonate, zinc carbonate, and lead(II) carbonate. This test is used to precipitate the ion present as almost all carbonates are insoluble. While this test is useful for telling these cations apart, it fails if other ions are present, because most metal carbonates are insoluble and will precipitate. In addition, calcium, zinc, and lead ions all produce white precipitates with carbonate, making it difficult to distinguish between them. Instead of sodium carbonate, sodium hydroxide may be added, this gives nearly the same colours, except that lead and zinc hydroxides are soluble in excess alkali, and can hence be distinguished from calcium. For the complete sequence of tests used for qualitative cation analysis, see qualitative inorganic analysis.

Other applications

Sodium carbonate is a food additive (E500) used as an acidity regulator, anticaking agent, raising agent, and stabilizer. It is one of the components of kansui (かん水^?), a solution of alkaline salts used to give ramen noodles their characteristic flavor and texture. It is also used in the production of snus (Swedish-style snuff) to stabilize the pH of the final product. In Sweden, snus is regulated as a food product because it is put into the mouth, requires pasteurization, and contains only ingredients that are approved as food additives.

Sodium carbonate is also used in the production of sherbet powder. The cooling and fizzing sensation results from the endothermic reaction between sodium carbonate and a weak acid, commonly citric acid, releasing carbon dioxide gas, which occurs when the sherbet is moistened by saliva.

In China, it is used to replace lye-water in the crust of traditional Cantonese moon cakes, and in many other Chinese steamed buns and noodles.

Sodium carbonate is used by the brick industry as a wetting agent to reduce the amount of water needed to extrude the clay.

In casting, it is referred to as "bonding agent" and is used to allow wet alginate to adhere to gelled alginate.

Sodium carbonate is used in toothpastes, where it acts as a foaming agent and an abrasive, and to temporarily increase mouth pH.

Sodium carbonate is used by the cotton industry to neutralize the sulfuric acid needed for acid delinting of fuzzy cottonseed.

Sodium carbonate, in a solution with common salt, may be used for cleaning silver. In a nonreactive container (glass, plastic, or ceramic), aluminium foil and the silver object are immersed in the hot salt solution. The elevated pH dissolves the aluminium oxide layer on the foil and enables an electrolytic cell to be established. Hydrogen ions produced by this reaction reduce the sulfide ions on the silver restoring silver metal. The sulfide can be released as small amounts of hydrogen sulfide. Rinsing and gently polishing the silver restores a highly polished condition.^[14]

Sodium carbonate is used in some aquarium water pH buffers to maintain a desired pH and carbonate hardness (KH).

Because of its ability to absorb CO₂, sodium carbonate is being investigated as a carbon-capturing material for power plants and in other industries that produce greenhouse gases.^[15]

Physical properties

The integral enthalpy of solution of sodium carbonate is −28.1 kJ/mol for a 10% w/w aqueous solution.^[16] The Mohs hardness of sodium carbonate monohydrate is 1.3.^[6]

Occurrence

Sodium carbonate crystallizes from water to form three different hydrates:

sodium carbonate decahydrate (natron)
sodium carbonate heptahydrate (not known in mineral form)
sodium carbonate monohydrate (thermonatrite).

Structure of monohydrate at 346 K.

Sodium carbonate is soluble in water, and can occur naturally in arid regions, especially in mineral deposits (evaporites) formed when seasonal lakes evaporate. Deposits of the mineral natron have been mined from dry lake bottoms in Egypt since ancient times, when natron was used in the preparation of mummies and in the early manufacture of glass.

The anhydrous mineral form of sodium carbonate is quite rare and called natrite. Sodium carbonate also erupts from Ol Doinyo Lengai, Tanzania's unique volcano, and it is presumed to have erupted from other volcanoes in the past, but due to these minerals' instability at the earth's surface, are likely to be eroded. All three mineralogical forms of sodium carbonate, as well as trona, trisodium hydrogendicarbonate dihydrate, are also known from ultra-alkaline pegmatitic rocks, that occur for example in the Kola Peninsula in Russia.

Production

Mining

Trona, trisodium hydrogendicarbonate dihydrate (Na₃HCO₃CO₃·2H₂O), is mined in several areas of the US and provides nearly all the domestic consumption of sodium carbonate. Large natural deposits found in 1938, such as the one near Green River, Wyoming, have made mining more economical than industrial production in North America. There are important reserves of trona in Turkey; two million tons of soda ash have been extracted from the reserves near Ankara. It is also mined from some alkaline lakes such as Lake Magadi in Kenya by dredging. Hot saline springs continuously replenish salt in the lake so that, provided the rate of dredging is no greater than the replenishment rate, the source is fully sustainable.^{[citation needed]}

Barilla and kelp

Several "halophyte" (salt-tolerant) plant species and seaweed species can be processed to yield an impure form of sodium carbonate, and these sources predominated in Europe and elsewhere until the early 19th century. The land plants (typically glassworts or saltworts) or the seaweed (typically Fucus species) were harvested, dried, and burned. The ashes were then "lixiviated" (washed with water) to form an alkali solution. This solution was boiled dry to create the final product, which was termed "soda ash"; this very old name refers to the archetypal plant source for soda ash, which was the small annual shrub Salsola soda ("barilla plant").

The sodium carbonate concentration in soda ash varied very widely, from 2–3 percent for the seaweed-derived form ("kelp"), to 30 percent for the best barilla produced from saltwort plants in Spain. Plant and seaweed sources for soda ash, and also for the related alkali "potash", became increasingly inadequate by the end of the 18th century, and the search for commercially viable routes to synthesizing soda ash from salt and other chemicals intensified.^[17]

Leblanc process

In 1791, the French chemist Nicolas Leblanc patented a process for producing sodium carbonate from salt, sulfuric acid, limestone, and coal. First, sea salt (sodium chloride) was boiled in sulfuric acid to yield sodium sulfate and hydrogen chloride gas, according to the chemical equation

2 NaCl + H₂SO₄ → Na₂SO₄ + 2 HCl

Next, the sodium sulfate was blended with crushed limestone (calcium carbonate) and coal, and the mixture was burnt, producing calcium sulfide.

Na₂SO₄ + CaCO₃ + 2 C → Na₂CO₃ + 2 CO₂ + CaS

The sodium carbonate was extracted from the ashes with water, and then collected by allowing the water to evaporate.

The hydrochloric acid produced by the Leblanc process was a major source of air pollution, and the calcium sulfide byproduct also presented waste disposal issues. However, it remained the major production method for sodium carbonate until the late 1880s.^[17]^[18]

Solvay process

In 1861, the Belgian industrial chemist Ernest Solvay developed a method to convert sodium chloride to sodium carbonate using ammonia. The Solvay process centered around a large hollow tower. At the bottom, calcium carbonate (limestone) was heated to release carbon dioxide:

CaCO₃ → CaO + CO₂

At the top, a concentrated solution of sodium chloride and ammonia entered the tower. As the carbon dioxide bubbled up through it, sodium bicarbonate precipitated:

NaCl + NH₃ + CO₂ + H₂O → NaHCO₃ + NH₄Cl

The sodium bicarbonate was then converted to sodium carbonate by heating it, releasing water and carbon dioxide:

2 NaHCO₃ → Na₂CO₃ + H₂O + CO₂

Meanwhile, the ammonia was regenerated from the ammonium chloride byproduct by treating it with the lime (calcium hydroxide) left over from carbon dioxide generation:

CaO + H₂O → Ca(OH)₂

Ca(OH)₂ + 2 NH₄Cl → CaCl₂ + 2 NH₃ + 2 H₂O

Because the Solvay process recycles its ammonia, it consumes only brine and limestone, and has calcium chloride as its only waste product. This made it substantially more economical than the Leblanc process, and it soon came to dominate world sodium carbonate production. By 1900, 90% of sodium carbonate was produced by the Solvay process, and the last Leblanc process plant closed in the early 1920s.The Solvay process results in soda ash (predominantly sodium carbonate (Na2CO3)) from brine (as a source of sodium chloride (NaCl)) and from limestone (as a source of calcium carbonate (CaCO3)).[6] The overall process is:

2 NaCl + CaCO3 → Na2CO3 + CaCl2

The actual implementation of this global, overall reaction is intricate.[8][9][10] A simplified description can be given using the four different, interacting chemical reactions illustrated in the figure. In the first step in the process, carbon dioxide (CO2) passes through a concentrated aqueous solution of sodium chloride (table salt, NaCl) and ammonia (NH3).

NaCl + CO2 + NH3 + H2O → NaHCO3 + NH4Cl (I)

In industrial practice, the reaction is carried out by passing concentrated brine through two towers. In the first, ammonia bubbles up through the brine (salt water) and is absorbed by it. In the second, carbon dioxide bubbles up through the ammoniated brine, and sodium bicarbonate (baking soda) precipitates out of the solution. Note that, in a basic solution, NaHCO3 is less water-soluble than sodium chloride. The ammonia (NH3) buffers the solution at a basic pH; without the ammonia, a hydrochloric acid byproduct would render the solution acidic, and arrest the precipitation.

The necessary ammonia "catalyst" for reaction (I) is reclaimed in a later step, and relatively little ammonia is consumed. The carbon dioxide required for reaction (I) is produced by heating ("calcination") of the limestone at 950 - 1100 °C. The calcium carbonate (CaCO3) in the limestone is partially converted to quicklime (calcium oxide (CaO)) and carbon dioxide:

CaCO3 → CO2 + CaO (II)

The sodium bicarbonate (NaHCO3) that precipitates out in reaction (I) is filtered out from the hot ammonium chloride (NH4Cl) solution, and the solution is then reacted with the quicklime (calcium oxide (CaO)) left over from heating the limestone in step (II).

2 NH4Cl + CaO → 2 NH3 + CaCl2 + H2O (III)

CaO makes a strong basic solution. The ammonia from reaction (III) is recycled back to the initial brine solution of reaction (I).

The sodium bicarbonate (NaHCO3) precipitate from reaction (I) is then converted to the final product, sodium carbonate (washing soda: Na2CO3), by calcination (160 - 230 C), producing water and carbon dioxide as byproducts:

2 NaHCO3 → Na2CO3 + H2O + CO2 (IV)

The carbon dioxide from step (IV) is recovered for re-use in step (I). When properly designed and operated, a Solvay plant can reclaim almost all its ammonia, and consumes only small amounts of additional ammonia to make up for losses. The only major inputs to the Solvay process are salt, limestone and thermal energy, and its only major byproduct is calcium chloride, which is sold as road salt.

Hou's process

This process was developed by Chinese chemist Hou Debang in the 1930s. The earlier steam reforming byproduct carbon dioxide was pumped through a saturated solution of sodium chloride and ammonia to produce sodium bicarbonate by these reactions:

NH₃ + CO₂ + H₂O → NH₄HCO₃

NH₄HCO₃ + NaCl → NH₄Cl + NaHCO₃

The sodium bicarbonate was collected as a precipitate due to its low solubility and then heated to yield pure sodium carbonate similar to last step of the Solvay process. More sodium chloride is added to the remaining solution of ammonium and sodium chlorides; also, more ammonia is pumped at 30-40°C to this solution. The solution temperature is then lowered to below 10°C. Solubility of ammonium chloride is higher than that of sodium chloride at 30°C and lower at 10°C. Due to this temperature-dependent solubility difference and the common-ion effect, ammonium chloride is precipitated in a sodium chloride solution.

The Chinese name of Hou's process, lianhe zhijian fa (联合制碱法), means "coupled manufacturing alkali method": Hou's process is coupled to the Haber process and offers better atom economy by eliminating the production of calcium chloride, since ammonia no longer needs to be regenerated. The byproduct ammonium chloride can be sold as a fertilizer.

References

^ ^a ^b ^c ^d Harper, J.P (1936). Antipov, Evgeny; Bismayer, Ulrich; Huppertz, Hubert; Petrícek, Václav; Pöttgen, Rainer; Schmahl, Wolfgang; Tiekink, E.R.T.; Zou, Xiaodong, eds. "Crystal Structure of Sodium Carbonate Monohydrate, Na₂CO₃. H₂O". Zeitschrift für Kristallographie - Crystalline Materials (De Gruyter) 95 (1): 266–273. doi:10.1524/zkri.1936.95.1.266. ISSN 2196-7105. Retrieved 2014-07-25.
^ ^a ^b ^c ^d ^e ^f ^g Lide, David R., ed. (2009). CRC Handbook of Chemistry and Physics (90th ed.). Boca Raton, Florida: CRC Press. ISBN 978-1-4200-9084-0.
^ ^a ^b Seidell, Atherton; Linke, William F. (1919). Solubilities of Inorganic and Organic Compounds (2nd ed.). New York: D. Van Nostrand Company. p. 633.
^ ^a ^b Comey, Arthur Messinger; Hahn, Dorothy A. (February 1921). A Dictionary of Chemical Solubilities: Inorganic (2nd ed.). New York: The MacMillan Company. p. 208–209.
^ ^a ^b ^c ^d Anatolievich, Kiper Ruslan. "sodium carbonate". http://chemister.ru. Retrieved 2014-07-25. External link in |website= (help)
^ ^a ^b ^c Pradyot, Patnaik (2003). Handbook of Inorganic Chemicals. The McGraw-Hill Companies, Inc. p. 861. ISBN 0-07-049439-8.
^ ^a ^b ^c ^d Dusek, Michal; Chapuis, Gervais; Meyer, Mathias; Petricek, Vaclav (2003). "Sodium carbonate revisited" (PDF). Acta Crystallographica Section B (International Union of Crystallography) 59 (3): 337–352. doi:10.1107/S0108768103009017. ISSN 0108-7681. Retrieved 2014-07-25.
^ ^a ^b ^c Betzel, C.; Saenger, W.; Loewus, D. (1982). "Sodium Carbonate Heptahydrate". Acta Crystallographica Section B (International Union of Crystallography) 38 (11): 2802–2804. doi:10.1107/S0567740882009996.
^ ^a ^b ^c Sigma-Aldrich Co., Sodium carbonate. Retrieved on 2014-05-06.
^ http://chem.sis.nlm.nih.gov/chemidplus/rn/497-19-8
^ "Material Safety Data Sheet – Sodium Carbonate, Anhydrous" (PDF). http://www.conservationsupportsystems.com. ConservationSupportSystems. Retrieved 2014-07-25. External link in |website= (help)
^ minerals.usgs.gov
^ http://pubchem.ncbi.nlm.nih.gov/compound/sodium_carbonate#section=Top
^ Finishing techniques in Metalwork - Philadelphia Museum of Art
^ "Microcapsule material for carbon capture developed". February 6, 2015.
^ tatachemicals.com
^ ^a ^b Clow, Archibald and Clow, Nan L. (1952). Chemical Revolution, (Ayer Co Pub, June 1952), pp. 65–90. ISBN 0-8369-1909-2.
^ Kiefer, David M. (January 2002). "It was all about alkali". Today's Chemist at Work 11 (1): 45–6.

External links

American Natural Soda Ash Company
International Chemical Safety Card 1135
FMC Wyoming Corporation
Use of sodium carbonate in dyeing
Sodium carbonate manufacturing by synthetic processes
Soda Ash light overview, manufacturing method and applications

Carbonates
H₂CO₃																	He
Li₂CO₃	BeCO₃											B	C	(NH₄)₂CO₃, NH₄HCO₃	O	F	Ne
Na₂CO₃, NaHCO₃, Na₃H(CO₃)₂	MgCO₃, Mg(HCO₃)₂											Al₂(CO₃)₃	Si	P	S	Cl	Ar
K₂CO₃, KHCO₃	CaCO₃, Ca(HCO₃)₂	Sc	Ti	V	Cr	MnCO₃	FeCO₃	CoCO₃	NiCO₃	CuCO₃	ZnCO₃	Ga	Ge	As	Se	Br	Kr
Rb₂CO₃	SrCO₃	Y	Zr	Nb	Mo	Tc	Ru	Rh	Pd	Ag₂CO₃	CdCO₃	In	Sn	Sb	Te	I	Xe
Cs₂CO₃, CsHCO₃	BaCO₃		Hf	Ta	W	Re	Os	Ir	Pt	Au	Hg	Tl₂CO₃	PbCO₃	(BiO)₂CO₃	Po	At	Rn
Fr	Ra		Rf	Db	Sg	Bh	Hs	Mt	Ds	Rg	Cn	Uut	Fl	Uup	Lv	Uus	Uuo
		↓
		La₂(CO₃)₃	Ce	Pr	Nd	Pm	Sm	Eu	Gd	Tb	Dy	Ho	Er	Tm	Yb	Lu
		Ac	Th	Pa	UO₂CO₃	Np	Pu	Am	Cm	Bk	Cf	Es	Fm	Md	No	Lr

UpToDate Contents

全文を閲覧するには購読必要です。 To read the full text you will need to subscribe.

1. 乳酸アシドーシスにおける重炭酸療法 bicarbonate therapy in lactic acidosis
2. 高二酸化炭素血症の許容（Permissive hypercapnia） permissive hypercapnia
3. 小児の腐食性食道損傷 caustic esophageal injury in children
4. 患者情報：低ナトリウム食（詳細） low sodium diet beyond the basics

English Journal

Clarification of pomegranate juice with chitosan: Changes on quality characteristics during storage.

Tastan O1, Baysal T2.
Food chemistry.Food Chem.2015 Aug 1;180:211-8. doi: 10.1016/j.foodchem.2015.02.053. Epub 2015 Feb 16.
In this study, for the first time, the use of chitosan as a clarifying agent in the production of clear pomegranate juice was evaluated and its effects on quality characteristics of juice were investigated. A central composite face centered design was used to establish the optimum conditions for cla
PMID 25766820

Responses of Lyngbya wollei to algaecide exposures and a risk characterization associated with their use.

Calomeni AJ1, Iwinski KJ2, Kinley CM2, McQueen A2, Rodgers JH Jr2.
Ecotoxicology and environmental safety.Ecotoxicol Environ Saf.2015 Jun;116:90-8. doi: 10.1016/j.ecoenv.2015.03.004. Epub 2015 Mar 13.
To make informed decisions regarding management of noxious algal growths, water resource managers require information on responses of target and non-target species to algaecide exposures. Periodic treatments of Phycomycin®-SCP (sodium carbonate peroxyhydrate) followed by Algimycin®-PWF (gluconate
PMID 25770656

Determination of sulphite in wines using suppressed ion chromatography.

Yoshikawa K1, Uekusa Y2, Sakuragawa A2.
Food chemistry.Food Chem.2015 May 1;174:387-91. doi: 10.1016/j.foodchem.2014.11.066. Epub 2014 Nov 15.
Suppressed ion chromatography with the use of a conductivity detector was developed for the determination of sulphite ions in wine samples. When a mixed solution of sodium carbonate, sodium bicarbonate, and acetone was used as the mobile phase, simultaneous determination of eight inorganic anions (i
PMID 25529696

Japanese Journal

Geopolymeric cements based on South-Kazakhstan clay loam produced by non-clinker and non-fired scheme

Japanese Geotechnical Society Special Publication 2(14), 560-563, 2016
NAID 130005123873

〔報文〕ピータン調製方法に関する文献調査とその検討

學苑 902, 34-45, 2015-12-01
NAID 110009982514

P-58 各種水溶液によるセルロース充填層の溶解(水熱,Poster Session 2)

バイオマス科学会議発表論文集 (10), 163-164, 2015-01-08
NAID 110009926334

「dihydroxialumini sodium carbonate」

Sodium carbonate
Names
	IUPAC name Sodium carbonate
	Other names Soda ash, Washing soda, Soda crystals
Identifiers
CAS Number	497-19-8 (anhydrous) ; 5968-11-6 (monohydrate) ; 6132-02-1 (decahydrate)
ChEBI	CHEBI:29377
ChEMBL	ChEMBL186314
ChemSpider	9916
EC Number	207-838-8
Jmol interactive 3D	Image
PubChem	10340
RTECS number	VZ4050000
UNII	45P3261C7T
	InChI InChI=1S/CH2O3.2Na/c2-1(3)4;;/h(H2,2,3,4);;/q;2+1/p-2 Key: CDBYLPFSWZWCQE-UHFFFAOYSA-L ; InChI=1/NaHCO3.2Na/c2-1(3)4;;/h(H2,2,3,4);;/q;2+1/p-2 Key: CDBYLPFSWZWCQE-NUQVWONBAP ;
	SMILES [Na+].[Na+].[O-]C([O-])=O ;
Properties
Chemical formula	Na2CO3
Molar mass	105.9888 g/mol (anhydrous); 286.1416 g/mol (decahydrate)
Appearance	White solid, hygroscopic
Odor	Odorless
Density	2.54 g/cm3 (25 °C, anhydrous); 1.92 g/cm3 (856 °C); 2.25 g/cm3 (monohydrate); 1.51 g/cm3 (heptahydrate); 1.46 g/cm3 (decahydrate)
Melting point	851 °C (1,564 °F; 1,124 K); decomposes (anhydrous); 100 °C (212 °F; 373 K); decomposes (monohydrate); 33.5 °C (92.3 °F; 306.6 K); decomposes (heptahydrate); 34 °C (93 °F; 307 K); (decahydrate)
Solubility in water	Decahydrate:; 7 g/100 mL (0 °C); 16.4 g/100 mL (15 °C); 34.07 g/100 mL (27.8 °C); Heptahydrate:; 48.69 g/100 mL (34.8 °C); Monohydrate:; 50.31 g/100 mL (29.9 °C); 48.1 g/100 mL (41.9 °C); 45.62 g/100 mL (60 °C); 43.6 g/100 mL (100 °C)
Solubility	Soluble in aq. alkalis, glycerol; Slightly soluble in aq. alcohol; Insoluble in CS2, acetone, alkyl acetates, alcohol, benzonitrile, liquid ammonia
Solubility in glycerine	98.3 g/100 g (15.5 °C)
Solubility in ethanediol	3.46 g/100 g (20 °C)
Solubility in dimethylformamide	0.5 g/kg
Basicity (pKb)	3.67
Magnetic susceptibility (χ)	−4.1·10−5 cm3/mol
Refractive index (nD)	1.485 (anhydrous); 1.420 (monohydrate); 1.405 (decahydrate)
Viscosity	3.4 cP (887 °C)
Structure
Crystal structure	Monoclinic (γ-form, β-form, δ-form, anhydrous); Orthorhombic (monohydrate, heptahydrate)
Space group	C2/m, No. 12 (γ-form, anhydrous, 170 K); C2/m, No. 12 (β-form, anhydrous, 628 K); P21/n, No. 14 (δ-form, anhydrous, 110 K); Pca21, No. 29 (monohydrate); Pbca, No. 61 (heptahydrate)
Point group	2/m (γ-form, β-form, δ-form, anhydrous); mm2 (monohydrate); 2/m 2/m 2/m (heptahydrate)
Lattice constant	a = 8.920(7) Å, b = 5.245(5) Å, c = 6.050(5) Å (γ-form, anhydrous, 295 K) α = 90°, β = 101.35(8)°, γ = 90°
Coordination geometry	Octahedral (Na+, anhydrous)
Thermochemistry
Specific; heat capacity (C)	112.3 J/mol·K
Std molar; entropy (So298)	135 J/mol·K
Std enthalpy of; formation (ΔfHo298)	−1130.7 kJ/mol
Gibbs free energy (ΔfG˚)	−1044.4 kJ/mol
Hazards
Safety data sheet	MSDS
GHS pictograms
GHS signal word	Warning
GHS hazard statements	H319
GHS precautionary statements	P305+351+338
EU classification (DSD)	Xi
R-phrases	R36
S-phrases	(S2), S22, S26
NFPA 704	0 2 0
	Lethal dose or concentration (LD, LC):
LD50 (Median dose)	4090 mg/kg (rat, oral)
Related compounds
Other anions	Sodium bicarbonate
Other cations	Lithium carbonate; Potassium carbonate; Rubidium carbonate; Caesium carbonate
Related compounds	Sodium sesquicarbonate; Sodium percarbonate
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
	verify (what is ?)
	Infobox references

　　[★]

炭酸ジヒドロキシアルミニウムナトリウム

「dihydroxyaluminum sodium carbonate」

　　[★]

ジヒドロキシアルミニウム炭酸ナトリウム

「carbonate」

　　[★]

炭酸、(化合物)炭酸塩

関: carbonic、carbonic acid

[cod-1] Harper, J.P (1936). Antipov, Evgeny; Bismayer, Ulrich; Huppertz, Hubert; Petrícek, Václav; Pöttgen, Rainer; Schmahl, Wolfgang; Tiekink, E.R.T.; Zou, Xiaodong, eds. "Crystal Structure of Sodium Carbonate Monohydrate, Na₂CO₃. H₂O". Zeitschrift für Kristallographie - Crystalline Materials (De Gruyter) 95 (1): 266–273. doi:10.1524/zkri.1936.95.1.266. ISSN 2196-7105. Retrieved 2014-07-25.

[crc-2] ^ ^a ^b ^c ^d ^e ^f ^g Lide, David R., ed. (2009). CRC Handbook of Chemistry and Physics (90th ed.). Boca Raton, Florida: CRC Press. ISBN 978-1-4200-9084-0.

[sioc-3] Seidell, Atherton; Linke, William F. (1919). Solubilities of Inorganic and Organic Compounds (2nd ed.). New York: D. Van Nostrand Company. p. 633.

[doc00-4] Comey, Arthur Messinger; Hahn, Dorothy A. (February 1921). A Dictionary of Chemical Solubilities: Inorganic (2nd ed.). New York: The MacMillan Company. p. 208–209.

[chemister-5] Anatolievich, Kiper Ruslan. "sodium carbonate". http://chemister.ru. Retrieved 2014-07-25. External link in |website= (help)

[pphoic-6] Pradyot, Patnaik (2003). Handbook of Inorganic Chemicals. The McGraw-Hill Companies, Inc. p. 861. ISBN 0-07-049439-8.

[scr-7] Dusek, Michal; Chapuis, Gervais; Meyer, Mathias; Petricek, Vaclav (2003). "Sodium carbonate revisited" (PDF). Acta Crystallographica Section B (International Union of Crystallography) 59 (3): 337–352. doi:10.1107/S0108768103009017. ISSN 0108-7681. Retrieved 2014-07-25.

[7h2o-8] Betzel, C.; Saenger, W.; Loewus, D. (1982). "Sodium Carbonate Heptahydrate". Acta Crystallographica Section B (International Union of Crystallography) 38 (11): 2802–2804. doi:10.1107/S0567740882009996.

[sigma-9] Sigma-Aldrich Co., Sodium carbonate. Retrieved on 2014-05-06.

[10] ttp://chem.sis.nlm.nih.gov/chemidplus/rn/497-19-8

[css-11] "Material Safety Data Sheet – Sodium Carbonate, Anhydrous" (PDF). http://www.conservationsupportsystems.com. ConservationSupportSystems. Retrieved 2014-07-25. External link in |website= (help)

[12] rals.usgs.gov

[13] ttp://pubchem.ncbi.nlm.nih.gov/compound/sodium_carbonate#section=Top

[14] Finishing techniques in Metalwork - Philadelphia Museum of Art

[15] "Microcapsule material for carbon capture developed". February 6, 2015.

[16] tatachemicals.com

[Clow52-17] Clow, Archibald and Clow, Nan L. (1952). Chemical Revolution, (Ayer Co Pub, June 1952), pp. 65–90. ISBN 0-8369-1909-2.

[Kiefer-18] Kiefer, David M. (January 2002). "It was all about alkali". Today's Chemist at Work 11 (1): 45–6.

拡張検索	「dihydroxialumini sodium carbonate」「dihydroxyaluminum sodium carbonate」
関連記事	「carbonate」

匿名

検索

案内

案内

sodium carbonate