Substance profile
4-hydroxy-4-methylpentan-2-one
4-hydroxy-4-methylpentan-2-one is a colorless liquid with a faint pleasant odor.
01 · Identification
What 4-hydroxy-4-methylpentan-2-one is
4-hydroxy-4-methylpentan-2-one is a colorless liquid with a faint pleasant odor. Its molecular formula is C6H12O2 and its molecular weight is 116.16 g/mol. It boils at 168 °C, melts at -44 °C, is miscible with water.
Under the GHS it carries the signal word Warning. It is classed as flammable agents - 2nd degree.
Other names for 4-hydroxy-4-methylpentan-2-one
- diacetone alcohol
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 |
|---|---|
| H319 | Causes serious eye irritation. |
Precautionary statements: P264, P280, P305, P313, P337, P338
03 · Physical and chemical properties
4-hydroxy-4-methylpentan-2-one 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 | 167.9 °C (334.2 °F) | at 760 mmHg | HSDB |
| 167.78 °C (334 °F) | NIOSH | ||
| 164.44 °C (328 °F) | at 760 mmHg | CAMEO | |
| Melting point | -44 °C (-47.2 °F) | HSDB | |
| -43.89 °C (-47 °F) | NIOSH | ||
| -42.78 °C (-45 °F) | CAMEO | ||
| Density | 0.94 g/cm³ | NIOSH | |
| 0.938 g/cm³ | at 20 °C | CAMEO | |
| 0.9306 g/cm³ | at 25 °C | HSDB | |
| Solubility | MISCIBLE WITH WATER, ALCOHOL, ETHER, OTHER SOLVENTS | HSDB | |
| Water solubility of 1.0X10+6 mg/l | HSDB | ||
| Miscible | NIOSH | ||
| Vapor pressure | 1 mmHg | NIOSH | |
| 3.62 mmHg | CAMEO | ||
| 0.97 mmHg | at 20 °C | HSDB | |
| Flash point | 8 °C (46.4 °F) | CLOSED CUP | HSDB |
| 51.67 °C (125 °F) | NIOSH | ||
| Autoignition temperature | 603 °C (1117.4 °F) | HSDB | |
| 603.33 °C (1118 °F) | CAMEO | ||
| 640 °C (1184 °F) | ICSC | ||
| Lower explosive limit (LEL) | 6.9 % by volume | HSDB | |
| 1.8 % by volume | HSDB | ||
| Upper explosive limit (UEL) | 6.9 % by volume | HSDB | |
| Vapor density | 4 (air = 1) | AIR= 1.00 | HSDB |
| 4 (air = 1) | ICSC | ||
| Odor threshold | Absolute threshold odor concn 0.28 ppm; 100% recognition concn 1.7 ppm | HSDB | |
| Air: 0.28 ul/l; odor safety class B: B= 50-90% of distracted persons perceive warning of TLV. Water: 64 mg/l. | HSDB | ||
| Odor Threshold Low: 0.27 [ppm] | Haz-Map | ||
| Critical temperature and pressure | 333.89 °C (633 °F) | HSDB |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
04 · Handling and storage
Storing and handling 4-hydroxy-4-methylpentan-2-one
Storage conditions
... MATERIALS WHICH ARE TOXIC AS STORED OR WHICH CAN DECOMPOSE INTO TOXIC COMPONENTS ... SHOULD BE STORED IN A COOL WELL-VENTILATED PLACE, OUT OF THE DIRECT RAYS OF THE SUN, AWAY FROM AREAS OF HIGH FIRE HAZARD, AND SHOULD BE PERIODICALLY INSPECTED ... INCOMPATIBLE MATERIALS SHOULD BE ISOLATED ... .
Source: Hazardous Substances Data Bank (HSDB)
Incompatible materials
Strong oxidizers, strong alkalis.
Source: Hazardous Substances Data Bank (HSDB)
Planning storage for a mix of chemicals? Check 4-hydroxy-4-methylpentan… in the storage compatibility matrix →