Substance profile
3-acetyl-6-methyl-2H-pyran-2,4(3H)-dione
3-acetyl-6-methyl-2H-pyran-2,4(3H)-dione is needles from water, rhombic needles or prisms from alcohol and is odorless.
01 · Identification
What 3-acetyl-6-methyl-2H-pyran-2,4… is
3-acetyl-6-methyl-2H-pyran-2,4(3H)-dione is needles from water, rhombic needles or prisms from alcohol and is odorless. Its molecular formula is C8H8O4 and its molecular weight is 168.15 g/mol. It boils at 270 °C, melts at 110 °C.
Under the GHS it carries the signal word Warning.
Other names for 3-acetyl-6-methyl-2H-pyran-2,4…
- dehydracetic acid
02 · GHS classification
Hazards and label elements
Harmonised classification under CLP Annex VI. This is the legally binding classification in the EU; other jurisdictions may differ.
| Code | Hazard statement |
|---|---|
| H302 | Harmful if swallowed. |
03 · Physical and chemical properties
3-acetyl-6-methyl-2H-pyran-2,4… properties
Every value is shown with the conditions it was measured under and the source it came from. Where sources disagree, all values are listed rather than one being picked — the difference is usually a different form of the substance, not an error.
| Property | Value | Conditions | Source |
|---|---|---|---|
| Boiling point | 269.9 °C (517.8 °F) | at 760 mmHg | HSDB |
| Melting point | 110 °C (230 °F) | range, midpoint shown | HSDB |
| Solubility | SOL IN ALKALIES | HSDB | |
| water solubility = 690 mg/l @ 25 °C | at 25 °C | HSDB | |
| Vapor pressure | 1.9 mmHg | at 100 °C | HSDB |
| Flash point | 157 °C (314.6 °F) | HSDB | |
| Autoignition temperature | 366 °C (690.8 °F) | HSDB | |
| Vapor density | 5.8 (air = 1) | HSDB |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
04 · Source notes
Further notes on 3-acetyl-6-methyl-2H-pyran-2,4…
These are descriptions rather than measured values, so they are kept out of the table above and quoted here with the source that reported them.
Solubility
(WT/WT) 22% IN ACETONE, 18% IN BENZENE, 5% IN METHANOL, 3% IN USP ETHANOL, 3% IN CARBON TETRACHLORIDE, 5% IN ETHER, 0.7% IN N-HEPTANE, LESS THAN 0.1% IN GLYCEROL, 1.6% IN OLIVE OIL, 1.7% IN PROPYLENE GLYCOL, LESS THAN 0.1% IN WATER AT 25 °C
Source: HSDB
05 · Handling and storage
Storing and handling 3-acetyl-6-methyl-2H-pyran-2,4…
Incompatible materials
HIGHLY REACTIVE
Source: Hazardous Substances Data Bank (HSDB)
Planning storage for a mix of chemicals? Check 3-acetyl-6-methyl-2H-pyra… in the storage compatibility matrix →