Products Description of Dehydroacetic Acid CAS#520-45-6
Dehydroacetic acid is a synthetic heterocyclic organic compound that appears as white or nearly-white crystalline powder. It shows relatively low solubility in cold water and dissolves better in hot water, ethanol, propylene glycol and other polar organic solvents.
This substance belongs to a broad-spectrum organic preservative, with stable chemical performance within a wide pH and temperature range, and can maintain effective inhibitory activity against bacteria, molds and yeasts. It possesses weak acidic properties and is prone to forming water-soluble salts after reacting with alkalis. Proper sealed and shaded storage is required to avoid moisture and light-induced deterioration, and preserve its original physical and chemical characteristics.
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) |
| Fp | 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 | 142865 |
| 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) |
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) |
Product Application of Dehydroacetic Acid CAS#520-45-6
Dehydroacetic acid functions as a versatile organic-synthesis raw material, material toughening agent and broad-spectrum preservative for food-grade scenarios. Its antibacterial property was first discovered in 1940, and this compound has obtained food-preservation approvals from numerous countries worldwide. For food-processing applications, it can be adopted in cheese, bean paste and other food systems, while its water-soluble sodium salt, sodium dehydroacetate, is the more commonly-used preservative form in food formulations. Note that permitted food categories vary greatly across different regional regulations.
Beyond the food industry, it finds wide-ranging utilization in daily cosmetics, textile goods, topical antifungal pharmaceutical raw-materials for ringworm-related treatment, as well as the preservation of dental-related raw materials.
