Substance profile
5-Methyl-3-heptanone
5-Methyl-3-heptanone: liquid.
01 · Identification
What 5-Methyl-3-heptanone is
5-Methyl-3-heptanone: liquid. Its molecular formula is C8H16O and its molecular weight is 128.21 g/mol. It boils at 157 °C, melts at -56.7 °C, is practically insoluble in water.
Under the GHS it carries the signal word Warning. It is classed as flammable agents - 2nd degree.
Other names for 5-Methyl-3-heptanone
- 5-methylheptan-3-one
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. |
| H335 | May cause respiratory irritation. |
| H319 | Causes serious eye irritation. |
Precautionary statements: P210, P233, P241, P242, P264, P280, P305, P313, P337, P338, P403
This page lists only the codes assigned to 5-Methyl-3-heptanone. The full reference lives on the hazard statements hub, the precautionary statements hub and the GHS pictograms hub.
03 · Physical and chemical properties
5-Methyl-3-heptanone 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 | 157.22 °C (315 °F) | NIOSH | |
| 157.22 °C (315 °F) | at 760 mmHg | CAMEO | |
| 168 °C (334.4 °F) | at 760 mmHg | DOE PAC | |
| Melting point | -56.67 °C (-70 °F) | NIOSH | |
| -56.7 °C (-70.1 °F) | ICSC | ||
| Density | 0.82 g/cm³ | NIOSH | |
| Solubility | Insoluble | NIOSH | |
| Insoluble (NIOSH, 2024) | CAMEO | ||
| Solubility in water, g/100ml at 20 °C: 0.3 | at 20 °C | ICSC | |
| Vapor pressure | 2 mmHg | NIOSH | |
| 2.0027 mmHg | at 25 °C | ICSC | |
| Flash point | 58.89 °C (138 °F) | NIOSH | |
| 43 °C (109.4 °F) | ICSC | ||
| Lower explosive limit (LEL) | Class II Combustible Liquid: Fl.P. at or above 100 °F and below 140 °F. | NIOSH | |
| Vapor density | 4.4 (air = 1) | ICSC | |
| Odor threshold | Odor Threshold Low: 5.9 [ppm] | Haz-Map | |
| Odor threshold from AIHA | Haz-Map |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
04 · Handling and storage
Storing and handling 5-Methyl-3-heptanone
Incompatible materials
Strong oxidizers
Source: The National Institute for Occupational Safety and Health (NIOSH)
Reactivity
Ketones, such as ETHYL SEC-AMYL KETONE, are reactive with many acids and bases liberating heat and flammable gases (e.g., H2). The amount of heat may be sufficient to start a fire in the unreacted portion of the ketone. Ketones react with reducing agents such as hydrides, alkali metals, and nitrides to produce flammable gas (H2) and heat. Ketones are incompatible with isocyanates, aldehydes, cyanides, peroxides, and anhydrides. They react violently with aldehydes, HNO3, HNO3 + H2O2, and HClO4.
Source: CAMEO Chemicals
Planning storage for a mix of chemicals? Check 5-Methyl-3-heptanone in the storage compatibility matrix →
Safety Data Sheet
Getting an SDS for 5-Methyl-3-heptanone
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 5-Methyl-3-heptanone 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.
Nearby
Substances next to 5-Methyl-3-heptanone
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