Dehydroacetic acid , 98% , 520-45-6

Synonym(s):
2-Acetyl-5-hydroxy-3-oxo-4-hexenoic acid δ-lactone;3-Acetyl-3,4-dihydro-6-methyl-2H-pyran-2,4-dione;Dehydroacetic acid

CAS NO.：520-45-6

Empirical Formula: C8H8O4

Molecular Weight: 168.15

MDL number: MFCD00066709

EINECS: 208-293-9

PRODUCT 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.: Store below +30°C.
• solubility: 2g/l
• form: Fine Crystalline Powder
• pka: 5.53±0.40(Predicted)
• color: Light yellow or cream
• PH: 4 (2g/l, H2O, 20℃)
• Odor: almost odorless. slightly bitter-sweet taste.
• Water Solubility: 500mg/L at 25℃
• Merck: 14,2865
• BRN: 6129
• Stability: Stable. Incompatible with oxidizing agents, bases, reducing agents.
• InChIKey: PGRHXDWITVMQBC-UHFFFAOYSA-N
• LogP: 0.78 at 20℃
• 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)

Description and 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

Safety

• Symbol(GHS): GHS07
• Signal word: Warning
• Hazard statements: H302
• Precautionary statements: P264-P270-P301+P312-P501
• 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)