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WordNet

street name for lysergic acid diethylamide (同)back breaker, battery-acid, dose, dot, Elvis, loony toons, Lucy in the sky with diamonds, pane, superman, window pane, Zen
any of various water-soluble compounds having a sour taste and capable of turning litmus red and reacting with a base to form a salt
having the characteristics of an acid; "an acid reaction"

PrepTutorEJDIC

酸性の / 酸味のある,すっぱい(sour) / (言葉・態度などが)厳しい,しんらつな / 酸 / すっぱいもの / 《俗》=LSD

Wikipedia preview

出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2017/10/25 09:16:19」(JST)

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Dehydroacetic acid is an organic compound which has several industrial applications. The compound is classified as a pyrone derivative. It presents as an odorless, colorless to white crystalline powder, almost insoluble in water and moderately soluble in most organic solvents. ^[2]

Preparation

It is prepared by the base-catalysed dimerization of diketene.^[3] Useful catalysts include tertiary amines, imidazole, DABCO, and pyridine.^[4]

Uses

Industrially, dehydroacetic acid has several uses which include the following:

as a fungicide and bactericide. The sodium salt, sodium dehydroacetate, is often used in place of dehydroacetic acid because of its greater solubility in water.
as a food preservative to prevent pickle bloating in squash and strawberries.^[5] When used as a food additive, dehydroacetic acid is referred to using the International Numbering System for Food Additives or E number 265.
as a plasticizer in synthetic resins.^[1]
as an antienzyme in toothpastes.
as a precursor for dimethyl-4-pyridones. The compounds are synthesized when dehydroacetic acid is exposed to aqueous solutions containing primary amines.^[6]

References

^ ^a ^b Merck Index, 11th Edition, 2855
^ Jilalat, Alae Eddine et. al (2017). "DEHYDROACETIC ACID (Part 1): CHEMICAL AND PHARMACOLOGICAL PROPERTIES". Journal Marocain de Chimie Hétérocyclique. 16 (1): 1–47. ISSN 1114-7792. Retrieved July 3, 2017.
^ Raimund Miller, Claudio Abaecherli, Adel Said, Barry Jackson. "Ketenes". In Ullmann's Encyclopedia of Industrial Chemistry. 2001, Wiley-VCH, Weinheim. doi: 10.1002/14356007.a15_063
^ Clemens, Robert J.; Witzeman, J. Stewart (1993). Agreda, Victor H.; Zoeller, Joseph R., eds. Acetic Acid and its Derivatives. New York: Marcel Dekker, Inc. p. 202. ISBN 9780824787929.
^ Harold William Rossmoore. Handbook of Biocide and Preservative Use, p. 341. ISBN 0-7514-0212-5
^ Cook, Denys (1963). "The Preparation, Properties, and Structure of 2,6-bis-(Alkyamino)-2,5-heptadien-4-ones". Canadian Journal of Chemistry. 41 (6): 1435–1440. doi:10.1139/v63-195.

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UpToDate Contents

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1. 尿酸のバランス uric acid balance
2. 出産時の臍帯血酸塩基分析 umbilical cord blood acid base analysis at delivery
3. 妊娠中の葉酸補充 folic acid supplementation in pregnancy
4. ポルフィリン症：概要 porphyrias an overview
5. 疾患予防におけるビタミン補給 vitamin supplementation in disease prevention

English Journal

Large volume sample stacking with EOF and sweeping in CE for determination of common preservatives in cosmetic products by chemometric experimental design.

Cheng YC, Wang CC, Chen YL, Wu SM.SourceSchool of Pharmacy, College of Pharmacy, Kaohsiung Medical University, Kaohsiung, Taiwan.
Electrophoresis.Electrophoresis.2012 May;33(9-10):1443-8. doi: 10.1002/elps.201100546.
This study proposes a capillary electrophoresis method incorporating large volume sample stacking, EOF and sweeping for detection of common preservatives used in cosmetic products. The method was developed using chemometric experimental design (fractional factorial design and central composite desig
PMID 22648813

Determination and depletion of dehydroacetic acid residue in chicken tissues.

Zhang Y, Du Y, Yin J, Hu C, Liu X, Cui W.SourceDepartment of Veterinary Pharmacology and Toxicology, College of Veterinary Medicine, Yangzhou University, Yangzhou, Jiangsu 225009, China. ymzhnet@sina.com
Food additives & contaminants. Part A, Chemistry, analysis, control, exposure & risk assessment.Food Addit Contam Part A Chem Anal Control Expo Risk Assess.2012;29(6):918-24. Epub 2012 Mar 7.
A high-performance liquid chromatography (HPLC) method was developed to determine dehydroacetic acid (DHA) residues in chicken muscle, liver and kidney. DHA was extracted using acetonitrile, and clean-up performed using a strong anion exchange (PAX) SPE column. The cleaned-up samples were separated
PMID 22394145

Japanese Journal

別府市民の食事経由による保存料の一日摂取量の推定

別府大学紀要 (54), 159-168, 2013-02
NAID 120005265152

固相抽出―LC-MS/MS法による食品中の甘味料12種および保存料9種の一斉分析

食品衛生学雑誌 54(3), 204-212, 2013
NAID 130003369294

Analysis of Nine Food Additives in Red Wine by Ion-Suppression Reversed-Phase High-Performance Liquid Chromatography Using Trifluoroacetic Acid and Ammonium Acetate as Ion-Suppressors

Analytical Sciences 28(10), 967-971, 2012
NAID 130004442076

Related Pictures

★リンクテーブル★

リンク元	「DHA」「デヒドロ酢酸」

「DHA」

Dehydroacetic acid^[1]
Names
	Preferred IUPAC name 3-Acetyl-2-hydroxy-6-methyl-4H-pyran-4-one[citation needed]
	Other names Biocide 470F[citation needed]; Methylacetopyronone[citation needed]
Identifiers
CAS Number	520-45-6 ;
3D model (JSmol)	Interactive image;
Abbreviations	DHAA
ChemSpider	10177 ;
ECHA InfoCard	100.007.541
EC Number	208-293-9
E number	E265 (preservatives)
MeSH	dehydroacetic+acid
PubChem CID	10623;
UNII	2KAG279R6R ;
	InChI InChI=1S/C8H8O4/c1-4-3-6(10)7(5(2)9)8(11)12-4/h3,11H,1-2H3 Key: JEQRBTDTEKWZBW-UHFFFAOYSA-N ;
	SMILES CC(=O)C1=C(O)OC(C)=CC1=O ;
Properties
Chemical formula	C8H8O4
Molar mass	168.15 g·mol−1
Appearance	White crystals
Melting point	109 °C; 228 °F; 382 K
Boiling point	270 °C; 518 °F; 543 K
Hazards
EU classification (DSD) (outdated)	Xn
R-phrases (outdated)	R22
S-phrases (outdated)	(S2)
NFPA 704	1 1 0
	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

　　[★]

ドコサヘキサエン酸 docosahexaenoate docosahexaenoic acid
デヒドロエピアンドロステロン dehydoroepiandrosterone
デヒドロ酢酸 dehydroacetic acid

「デヒドロ酢酸」

　　[★]

英: dehydroacetic acid DHA

[Merck-1] Merck Index, 11th Edition, 2855

[2] Jilalat, Alae Eddine et. al (2017). "DEHYDROACETIC ACID (Part 1): CHEMICAL AND PHARMACOLOGICAL PROPERTIES". Journal Marocain de Chimie Hétérocyclique. 16 (1): 1–47. ISSN 1114-7792. Retrieved July 3, 2017.

[3] Raimund Miller, Claudio Abaecherli, Adel Said, Barry Jackson. "Ketenes". In Ullmann's Encyclopedia of Industrial Chemistry. 2001, Wiley-VCH, Weinheim. doi: 10.1002/14356007.a15_063

[4] Clemens, Robert J.; Witzeman, J. Stewart (1993). Agreda, Victor H.; Zoeller, Joseph R., eds. Acetic Acid and its Derivatives. New York: Marcel Dekker, Inc. p. 202. ISBN 9780824787929.

[5] Harold William Rossmoore. Handbook of Biocide and Preservative Use, p. 341. ISBN 0-7514-0212-5

[6] Cook, Denys (1963). "The Preparation, Properties, and Structure of 2,6-bis-(Alkyamino)-2,5-heptadien-4-ones". Canadian Journal of Chemistry. 41 (6): 1435–1440. doi:10.1139/v63-195.

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案内

dehydroacetic acid