Substance profile
Cyclohexanone
Cyclohexanone is an oily liquid with an odor reminiscent of peppermint & acetone.
01 · Identification
What Cyclohexanone is
Cyclohexanone is an oily liquid with an odor reminiscent of peppermint & acetone. Its molecular formula is C6H10O and its molecular weight is 98.14 g/mol. It boils at 156 °C, melts at -31 °C.
Under the GHS it carries the signal word Warning. It is classed as flammable agents - 2nd degree.
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 |
|---|---|
| H226 | Flammable liquid and vapour. |
| H332 | Harmful if inhaled. |
Precautionary statements: P210, P233, P241, P242, P260, P271, P304, P312, P403
03 · Physical and chemical properties
Cyclohexanone 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 | 155.6 °C (312.1 °F) | at 760 mmHg | HSDB |
| 155.56 °C (312 °F) | NIOSH | ||
| 155.61 °C (312.1 °F) | at 760 mmHg | CAMEO | |
| Melting point | -31 °C (-23.8 °F) | HSDB | |
| -45 °C (-49 °F) | NIOSH | ||
| -16.11 °C (3 °F) | CAMEO | ||
| Density | 0.95 g/cm³ | NIOSH | |
| 0.945 g/cm³ | at 20 °C | CAMEO | |
| 0.9421 g/cm³ | at 25 °C | HSDB | |
| Solubility | SOL IN ACETONE; ETHYL ETHER; ETHANOL; WATER | HSDB | |
| SOLUBLE IN ALCOHOL, ETHER, AND OTHER COMMON ORGANIC SOLVENTS | HSDB | ||
| SOLUBILITY OF WATER IN CYCLOHEXANONE: 87 G/L AT 20 °C. | at 20 °C | HSDB | |
| Vapor pressure | 5 mmHg | NIOSH | |
| 5.2 mmHg | at 25 °C | CAMEO | |
| 5 mmHg | at 26.4 °C | HSDB | |
| Flash point | 43.89 °C (111 °F) | HSDB | |
| Autoignition temperature | 420 °C (788 °F) | HSDB | |
| Lower explosive limit (LEL) | 1.2 % by volume | CAMEO | |
| 1.1 % by volume | OSHA | ||
| Upper explosive limit (UEL) | 9.4 % by volume | NIOSH | |
| 8.1 % by volume | CAMEO | ||
| Vapor density | 3.4 (air = 1) | HSDB | |
| Odor threshold | 0.88 ppm; v/v | HSDB | |
| Odor low mg/cu m= 0.4800; Odor high 400 mg/cu m; Irritating Concn= 100 mg/cu m | HSDB | ||
| Odor Threshold Low: 0.12 [ppm] | Haz-Map | ||
| Critical temperature and pressure | 356.11 °C (673 °F) | HSDB | |
| Corrosivity | Corrosive | HSDB |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
04 · Handling and storage
Storing and handling Cyclohexanone
Storage conditions
Keep containers closed; prohibit open flame. Store in cool and dark plane.
Source: Hazardous Substances Data Bank (HSDB)
Incompatible materials
Incompatible with oxidizing agents.
Source: Hazardous Substances Data Bank (HSDB)
Reactivity
CYCLOHEXANONE forms an explosive peroxide with H2O2, and reacts vigorously with oxidizing materials (nitric acid). (NTP, 1992)
Source: CAMEO Chemicals
Planning storage for a mix of chemicals? Check Cyclohexanone in the storage compatibility matrix →