Substance profile
2-Methylcyclohexanone
2-Methylcyclohexanone is a water-white to pale yellow liquid with an acetone-like odor.
01 · Identification
What 2-Methylcyclohexanone is
2-Methylcyclohexanone is a water-white to pale yellow liquid with an acetone-like odor. Its molecular formula is C7H12O and its molecular weight is 112.17 g/mol. It boils at 165 °C, melts at -14 °C.
Under the GHS it carries the signal word Warning. It is classed as flammable agents - 2nd degree.
02 · Identifiers
2-Methylcyclohexanone identifiers and molecular data
2-Methylcyclohexanone CAS number and EC number
2-Methylcyclohexanone molecular formula and molecular weight
03 · GHS classification
2-Methylcyclohexanone hazard classification
Harmonised classification under CLP Annex VI. This is the legally binding classification in the EU; other jurisdictions may differ.
2-Methylcyclohexanone pictograms and signal word
2-Methylcyclohexanone hazard class and category
| Hazard class | Category | From code | Pictogram |
|---|---|---|---|
| Flammable liquids GHS chapter 2.6 | Category 3 | H226 | GHS02 |
| Acute toxicity - inhalation GHS chapter 3.1 | Category 4 | H332 | GHS07 |
2-Methylcyclohexanone hazard statements (H-codes)
| Code | Hazard statement |
|---|---|
| H226 | Flammable liquid and vapour. |
| H332 | Harmful if inhaled. |
This page lists only the codes assigned to 2-Methylcyclohexanone. The full reference lives on the hazard statements hub, the precautionary statements hub and the GHS pictograms hub.
Safety Data Sheet
Getting an SDS for 2-Methylcyclohexanone
A Safety Data Sheet is written for a product, not for a substance: the supplier of the grade you actually buy issues it, so two suppliers of 2-Methylcyclohexanone issue two different sheets. That is why there is no single authoritative SDS for a substance to download — what there is, is the job of collecting the sheets for the products you hold and keeping them current as suppliers revise them.
04 · Precautionary statements
2-Methylcyclohexanone precautionary statements
CLP Annex VI assigns 9 precautionary statements to 2-Methylcyclohexanone. They are grouped the way a label groups them: what to do before handling, what to do when something has already happened, how to store it and how to dispose of it.
Prevention
What to do before and during handling so the hazard never happens.
Response
What to do once exposure, spillage or fire has already happened.
Reading the notation. … is a blank the supplier fills in — not a truncated sentence.· [square brackets] mark a part printed only when it applies.
05 · Names in the regulation
2-Methylcyclohexanone name in 23 EU languages
CLP Annex VI Part 3 is published in every language edition of the regulation, and the identification column is written out in each of them. Nothing below is translated by us: each line is the name as that edition prints it. Under Art. 18(2) the substance name from Annex VI is a lawful product identifier, so this is the wording to put on a label going to that market — and where the cell lists several designations, any one of them qualifies.
| Language | Name in CLP Annex VI Part 3 |
|---|---|
| Bulgarian български | 2-метилциклохексанон |
| Spanish español | 2-Metilciclohexanona |
| Czech čeština | 2-methylcyklohexan-1-on |
| Danish dansk | 2-methylcyclohexanon |
| German Deutsch | 2-Methylcyclohexanon |
| Estonian eesti | 2-metüültsükloheksanoon |
| Greek ελληνικά | 2-μεθυλοκυκλοεξανόνη |
| English English | 2-methylcyclohexanone |
| French français | 2-méthylcyclohexanone |
| Croatian hrvatski | 2-metilcikloheksanon |
| Italian italiano | 2-metilcicloesanone |
| Latvian latviešu | 2-metilcikloheksanons |
| Lithuanian lietuvių | 2-metilcikloheksanonas |
| Hungarian magyar | 2-metilciklohexanon |
| Maltese Malti | 2-metilċikloessanon |
| Dutch Nederlands | 2-methylcyclohexanon |
| Polish polski | 2-metylocykloheksanon |
| Portuguese português | 2-metilciclo-hexanona |
| Romanian română | 2-metilciclohexanonă |
| Slovak slovenčina | 2-metylcyklohexanón |
| Slovenian slovenščina | 2-metilcikloheksanon |
| Finnish suomi | 2-metyylisykloheksanoni |
| Swedish svenska | 2-metylcyklohexanon |
All 23 language editions of Annex VI carry this entry. Irish is the twenty-fourth official EU language and has no line here for a different reason: no consolidated CLP text has ever been published in Irish, so there is no Irish edition of Annex VI to quote a name from. Source: consolidated CLP, CELEX 02008R1272, language editions. © European Union, https://eur-lex.europa.eu — only the electronic Official Journal of the European Union is authentic.
06 · Label elements
2-Methylcyclohexanone GHS label elements
Everything CLP Annex VI fixes for 2-Methylcyclohexanone, laid out the way it appears on a label. The greyed lines are the parts only the supplier can fill in.
Warning
2-Methylcyclohexanone
- Flammable liquid and vapour.
- Harmful if inhaled.
- Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.
- Keep container tightly closed.
- Use explosion-proof [electrical/ventilating/lighting/…] equipment.
- Use only non-sparking tools.
- Do not breathe dust/fume/gas/mist/vapours/spray.
- Use only outdoors or in a well-ventilated area.
- IF INHALED:
- Call a POISON CENTER/doctor/… if you feel unwell.
- Store in a well-ventilated place.
Supplier name, address and telephone number· Product identifier·Nominal quantity
Need this as an actual label? Open 2-Methylcyclohexanone in the GHS label constructor →
07 · Health hazards
2-Methylcyclohexanone health hazards and exposure limits
2-Methylcyclohexanone occupational exposure limits
| Limit | Value | Source |
|---|---|---|
| PEL | 100.0 [ppm] | Haz-Map, Information on Hazardous Chemicals and Occupational Diseases |
| PEL | 100 ppm (460 mg/m³) | Occupational Safety and Health Administration (OSHA) |
| PEL | TWA 100 ppm (460 mg/m3) [skin] See Appendix G | The National Institute for Occupational Safety and Health (NIOSH) |
| REL | 50 ppm (230 mg/m³) | Occupational Safety and Health Administration (OSHA) |
| REL | 75 ppm (345 mg/m³) | Occupational Safety and Health Administration (OSHA) |
| REL | TWA 50 ppm (230 mg/m3) ST 75 ppm (345 mg/m3) [skin] | The National Institute for Occupational Safety and Health (NIOSH) |
| IDLH | 600 ppm (NIOSH, 2024) | CAMEO Chemicals |
| IDLH | 600.0 [ppm] | Haz-Map, Information on Hazardous Chemicals and Occupational Diseases |
| IDLH | 600 ppm | Hazardous Substances Data Bank (HSDB) |
These are United States values. The European Union sets its own indicative and binding limits, and the figure that applies at a given workplace is the one in the local regulation — not the one shown here.
08 · Physical and chemical properties
2-Methylcyclohexanone 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.
2-Methylcyclohexanone boiling point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Boiling point | 165.1 °C (329.2 °F) | HSDB | |
| 162.78 °C (325 °F) | NIOSH | ||
| 165 °C (329 °F) | at 760 mmHg | CAMEO |
2-Methylcyclohexanone melting point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Melting point | -14 °C (6.8 °F) | HSDB | |
| -13.89 °C (7 °F) | NIOSH | ||
| -21.56 °C (-6.8 °F) | CAMEO |
2-Methylcyclohexanone density
| Property | Value | Conditions | Source |
|---|---|---|---|
| Density | 0.93 g/cm³ | NIOSH | |
| 0.925 g/cm³ | at 20 °C | HSDB |
2-Methylcyclohexanone solubility
| Property | Value | Conditions | Source |
|---|---|---|---|
| Solubility | Insol in water; sol in alcohol and ether | HSDB | |
| Insoluble | NIOSH | ||
| Insoluble (NIOSH, 2024) | CAMEO |
2-Methylcyclohexanone vapor pressure
| Property | Value | Conditions | Source |
|---|---|---|---|
| Vapor pressure | 1 mmHg | NIOSH |
2-Methylcyclohexanone flash point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Flash point | 47.78 °C (118 °F) | NIOSH |
2-Methylcyclohexanone lower explosive limit (LEL)
| Property | Value | Conditions | Source |
|---|---|---|---|
| Lower explosive limit (LEL) | Combustible | HSDB | |
| Class II Combustible Liquid: Fl.P. at or above 100 °F and below 140 °F. | NIOSH |
2-Methylcyclohexanone vapor density
| Property | Value | Conditions | Source |
|---|---|---|---|
| Vapor density | 3.86 (air = 1) | HSDB |
2-Methylcyclohexanone odor threshold
| Property | Value | Conditions | Source |
|---|---|---|---|
| Odor threshold | Odor Threshold Low: 0.5 [ppm] | Haz-Map | |
| Odor threshold from CHEMINFO | Haz-Map |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
09 · Fire and explosion
2-Methylcyclohexanone fire and explosion behaviour
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.
2-Methylcyclohexanone fire potential
MODERATE FIRE RISK.
Source: Hazardous Substances Data Bank (HSDB)
10 · Handling and storage
2-Methylcyclohexanone storage and handling
2-Methylcyclohexanone incompatible materials
Strong oxidizers
Source: Hazardous Substances Data Bank (HSDB)
2-Methylcyclohexanone reactivity
Contact with strong oxidizers may cause fires and explosions (USCG, 1999).
Source: CAMEO Chemicals
Planning storage for a mix of chemicals? Check 2-Methylcyclohexanone in the storage compatibility matrix →
11 · Questions
2-Methylcyclohexanone — frequently asked questions
What is the CAS number of 2-Methylcyclohexanone?
The CAS number of 2-Methylcyclohexanone is 583-60-8. Its EC number is 209-513-6.
What is the chemical formula of 2-Methylcyclohexanone?
The molecular formula of 2-Methylcyclohexanone is C7H12O and its molecular weight is 112.17 g/mol.
What does a 2-Methylcyclohexanone label have to show?
Under CLP Annex VI the label for 2-Methylcyclohexanone carries the pictograms Flame and Exclamation mark and the signal word is Warning.
Is 2-Methylcyclohexanone flammable?
Yes. CLP Annex VI assigns 2-Methylcyclohexanone H226 — flammable liquid and vapour. The flash point reported for it is 47.78 °C (118 °F) (NIOSH).
Is 2-Methylcyclohexanone a carcinogen?
CLP Annex VI records no harmonised carcinogenicity classification for 2-Methylcyclohexanone. Annex VI is a list of agreed classifications, not a list of substances found safe, so this is an absence of a classification rather than a clean bill of health.
What is the exposure limit for 2-Methylcyclohexanone?
The US occupational exposure limit reported for 2-Methylcyclohexanone is 100.0 [ppm] (Haz-Map, Information on Hazardous Chemicals and Occupational Diseases). Limits differ by country: the EU sets its own indicative and binding values, and the figure that applies at a given workplace is the one in the local regulation.
What is the boiling point of 2-Methylcyclohexanone?
The boiling point reported for 2-Methylcyclohexanone is 165.1 °C (329.2 °F) (HSDB).
What is the melting point of 2-Methylcyclohexanone?
The melting point reported for 2-Methylcyclohexanone is -14 °C (6.8 °F) (HSDB).
How should 2-Methylcyclohexanone be stored?
CLP Annex VI assigns 2-Methylcyclohexanone the storage statement P403.
Nearby
Substances next to 2-Methylcyclohexanone
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