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Dehydroacetic acid

Basic information Safety Supplier Related

Dehydroacetic acid Basic information

Product Name:
Dehydroacetic acid
Synonyms:
  • 3-Acetyl-6-methyl-2H-pyran-2,4(3H)-dione. enol form
  • 3-acetyl-6-methyl-2h-pyran-2,4(3h)-dione.enolform
  • 3-acetyl-6-methyl-2h-pyran-2,4(3h)-dioneenolform
  • 3-acetyl-6-methyl-2h-pyran-4(3h)-dione
  • 3-Acetyl-6-Methyldihydropyrandione-2,4
  • 3-Acetyl-6-methylpyrandione-2,4
  • 4(3H)-dione,3-acetyl-6-methyl-2H-Pyran-2
  • 4-Hexenoic acid, 2-acetyl-5-hydroxy-3-oxo-, delta-lactone
CAS:
520-45-6
MF:
C8H8O4
MW:
168.15
EINECS:
208-293-9
Product Categories:
  • DHA
  • Dehydroacetic acid and derivatives
  • Diketene Derivatives
  • Miscellaneous Specialties
Mol File:
520-45-6.mol
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Dehydroacetic acid Chemical Properties

Melting point:
111-113 °C(lit.)
Boiling point:
270 °C(lit.)
Density 
1.1816 (rough estimate)
vapor pressure 
0.001 hPa (20 °C)
refractive index 
1.4611 (estimate)
Flash point:
157°C
storage temp. 
0-6°C
solubility 
2g/l
pka
5.53±0.40(Predicted)
form 
Fine Crystalline Powder
color 
Light yellow or cream
PH
4 (2g/l, H2O, 20℃)
Merck 
14,2865
BRN 
6129
Stability:
Stable. Incompatible with oxidizing agents, bases, reducing agents.
InChIKey
PGRHXDWITVMQBC-UHFFFAOYSA-N
CAS DataBase Reference
520-45-6(CAS DataBase Reference)
NIST Chemistry Reference
Dehydroacetic Acid(520-45-6)
EPA Substance Registry System
3-Acetyl-6-methyl-2H-pyran-2,4(3H)-dione (520-45-6)
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Safety Information

Hazard Codes 
Xn
Risk Statements 
22
Safety Statements 
22-26
WGK Germany 
1
RTECS 
UP8050000
Autoignition Temperature
336 °C
TSCA 
Yes
HS Code 
29322980
Hazardous Substances Data
520-45-6(Hazardous Substances Data)
Toxicity
LD50 orally in rats: 1000 mg/kg (Spencer)

MSDS

  • Language:English Provider:DHA
  • Language:English Provider:ACROS
  • Language:English Provider:SigmaAldrich
  • Language:English Provider:ALFA
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Dehydroacetic acid Usage And Synthesis

Chemical Properties

white to light yellow crystal powder

Uses

Dehydroacetic acid (DHS) is used as stabilizer for cosmetic and pharmaceutical products due to its fungicide and bactericide activity, as additive for PVC-stabilizers and for the syntheses of veterinary medicines. Product Data Sheet

Uses

Geogard(R) 111a preservative is based on dehydroacetic acid (DHA) and therefore are recognized by major cosmetic, toiletry and fragrance regulatory authorities worldwide for use in cosmetic and personal care products.

Uses

Geogard(R) 221 preservative is based on dehydroacetic acid (DHA) and benzyl alcohol, and therefore is recognized by major cosmetic, toiletry and fragrance regulatory authorities worldwide for use in cosmetic and personal care products.

Uses

Geogard(R) 361 preservative is based on six synergistic components, all with wide global regulatory acceptance: dehydroacetic acid (DHA); salicylic acid; benzoic acid; phenoxyethanol; benzyl alcohol; and benzethonium chloride.

Uses

antifungal, antibacterial

Uses

dehydroacetic acid is a preservative with low sensitizing potential. This is a weak acid used as a fungi-and bacteria-destroying agent in cosmetics. The presence of organic matter decreases its effective ness. It is not irritating or allergy causing when applied on the skin.

Uses

Dehydroacetic Acid (DHA) is a preservative that is a crystalline powder with a solubility of less than 0.1 g in 100 g of water at 25°C. It can undergo a variety of chemical reactions which give it utility in many applications. It is used at 0.01–0.5% for microbiological growth inhibition in various foods. It is used for cut or peeled squash, with no more than 65 ppm remaining in or on the prepared squash.

Safety Profile

Poison by ingestion. Moderately toxic by intraperitoneal route. Questionable carcinogen with experimental tumorigenic data. Combustible when exposed to heat or flame. When heated to decomposition it emits acrid smoke and irritating fumes.

Dehydroacetic acidSupplier

Wuhan yuqing jiaheng pharmaceutical co. LTD Gold
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027-83855389-
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2586905842@qq.com
Wuhan hongde yuexin pharmaceutical technology co. LTD Gold
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027-83855391-
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hbzlkschem2009@163.com;
J & K SCIENTIFIC LTD.
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010-82848833- ;010-82848833-
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jkinfo@jkchemical.com;market6@jkchemical.com
Meryer (Shanghai) Chemical Technology Co., Ltd.
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21-61259100-
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sh@meryer.com
3B Pharmachem (Wuhan) International Co.,Ltd.
Tel
821-50328103-801
Email
3bsc@sina.com