Substance profile
4-Methoxy-4-methyl-2-pentanone
4-Methoxy-4-methyl-2-pentanone is a water-white liquid.
01 · Identification
What 4-Methoxy-4-methyl-2-pentanone is
4-Methoxy-4-methyl-2-pentanone is a water-white liquid. It boils at 160 °C, melts at -30 °C.
Under the GHS it carries the signal word Warning. It is classed as flammable agents - 2nd degree.
02 · Identifiers
4-Methoxy-4-methyl-2-pentanone identifiers and molecular data
4-Methoxy-4-methyl-2-pentanone CAS number and EC number
4-Methoxy-4-methyl-2-pentanone molecular formula and molecular weight
Other names for 4-Methoxy-4-methyl-2-pentanone
- 4-methoxy-4-methylpentan-2-one
03 · GHS classification
4-Methoxy-4-methyl-2-pentanone hazard classification
Harmonised classification under CLP Annex VI. This is the legally binding classification in the EU; other jurisdictions may differ.
4-Methoxy-4-methyl-2-pentanone pictograms and signal word
4-Methoxy-4-methyl-2-pentanone 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 |
4-Methoxy-4-methyl-2-pentanone hazard statements (H-codes)
| Code | Hazard statement |
|---|---|
| H226 | Flammable liquid and vapour. |
| H332 | Harmful if inhaled. |
This page lists only the codes assigned to 4-Methoxy-4-methyl-2-penta…. 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 4-Methoxy-4-methyl-2-penta…
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 4-Methoxy-4-methyl-2-p… 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
4-Methoxy-4-methyl-2-pentanone precautionary statements
CLP Annex VI assigns 9 precautionary statements to 4-Methoxy-4-methyl-2-penta…. 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
4-Methoxy-4-methyl-2-pentanone 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 | 4-метил-4-метоксипентан-2-он |
| Spanish español | 4-Metoxi-4-metilpentan-2-ona |
| Czech čeština | 4-methoxy-4-methylpentan-2-on |
| Danish dansk | 4-methoxy-4-methylpentan-2-on |
| German Deutsch | 4-Methoxy-4-methylpentan-2-on Diacetonalkoholmethylether |
| Estonian eesti | 4-metoksü-4-metüülpentaan-2-oon |
| Greek ελληνικά | 4-μεθοξυ-4-μεθυλοπενταν-2-όνη |
| English English | 4-methoxy-4-methylpentan-2-one |
| French français | 4-méthoxy-4-méthylpentan-2-one |
| Croatian hrvatski | 4-metoksi-4-metilpentan-2-on |
| Italian italiano | 4-metil-4-metossipentan-2-one |
| Latvian latviešu | 4-metoksi-4-metilpentān-2-ons |
| Lithuanian lietuvių | 4-metoksi-4-metil-2-pentanonas |
| Hungarian magyar | 4-metoxi-4-metilpentán-2-on |
| Maltese Malti | 4-metossi-4-metilpentan-2-on |
| Dutch Nederlands | 4-methoxy-4-methylpentaan-2-on |
| Polish polski | 4-metoksy-4-metylopentan-2-on |
| Portuguese português | 4-metoxi-4-metilpentan-2-ona |
| Romanian română | 4-metoxi-4-metilpentan-2-onă |
| Slovak slovenčina | 4-metoxy-4-metylpentán-2-ón |
| Slovenian slovenščina | 4-metoksi-4-metilpentan-2-on |
| Finnish suomi | 4-metoksi-4-metyylipentan-2-oni |
| Swedish svenska | 4-metoxi-4-metylpentan-2-on |
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
4-Methoxy-4-methyl-2-pentanone GHS label elements
Everything CLP Annex VI fixes for 4-Methoxy-4-methyl-2-penta…, laid out the way it appears on a label. The greyed lines are the parts only the supplier can fill in.
Warning
4-Methoxy-4-methyl-2-pentanone
- 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 4-Methoxy-4-methyl-2-penta… in the GHS label constructor →
07 · Health hazards
4-Methoxy-4-methyl-2-pentanone health hazards and exposure limits
4-Methoxy-4-methyl-2-pentanone hazard summary
A skin and eye irritant; [HSDB] A skin, eye, and respiratory tract irritant; Can cause aspiration pneumonitis after ingestion; [ICSC]
Source: Haz-Map, Information on Hazardous Chemicals and Occupational Diseases
08 · Physical and chemical properties
4-Methoxy-4-methyl-2-pentanone 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.
4-Methoxy-4-methyl-2-pentanone boiling point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Boiling point | 160 °C (320 °F) | ICSC | |
| 155 °C (311 °F) | range, midpoint shown | HSDB | |
| 155 °C (311 °F) | range, midpoint shown, at 760 mmHg | CAMEO |
4-Methoxy-4-methyl-2-pentanone melting point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Melting point | -30 °C (-22 °F) | ICSC |
4-Methoxy-4-methyl-2-pentanone density
| Property | Value | Conditions | Source |
|---|---|---|---|
| Density | 0.89 g/cm³ | ICSC |
4-Methoxy-4-methyl-2-pentanone solubility
| Property | Value | Conditions | Source |
|---|---|---|---|
| Solubility | Water solubility of 280,000 mg/l at 25 °C. | at 25 °C | HSDB |
| Solubility in water, g/100ml at 25 °C: 28 | at 25 °C | ICSC | |
| greater than or equal to 100 mg/mL at 66 °F (NTP, 1992) | at 18.89 °C | CAMEO |
4-Methoxy-4-methyl-2-pentanone vapor pressure
| Property | Value | Conditions | Source |
|---|---|---|---|
| Vapor pressure | 3.16 mmHg | at 25 °C | HSDB |
| 3.1503 mmHg | at 25 °C | ICSC | |
| 2.2 mmHg | Haz-Map |
4-Methoxy-4-methyl-2-pentanone flash point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Flash point | 60.56 °C (141 °F) | CAMEO | |
| 60 °C (140 °F) | ICSC | ||
| 61 °C (141.8 °F) | Haz-Map |
4-Methoxy-4-methyl-2-pentanone autoignition temperature
| Property | Value | Conditions | Source |
|---|---|---|---|
| Autoignition temperature | 400 °C (752 °F) | ICSC |
4-Methoxy-4-methyl-2-pentanone vapor density
| Property | Value | Conditions | Source |
|---|---|---|---|
| Vapor density | 4.49 (air = 1) | ICSC |
4-Methoxy-4-methyl-2-pentanone odor threshold
| Property | Value | Conditions | Source |
|---|---|---|---|
| Odor threshold | Odor Threshold Low: 25.0 [ppm] | Haz-Map | |
| [CAMEO] Odor threshold form CHEMINFO | Haz-Map |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
09 · Fire and explosion
4-Methoxy-4-methyl-2-penta… 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.
4-Methoxy-4-methyl-2-pentanone fire potential
MODERATE FIRE RISK.
Source: Hazardous Substances Data Bank (HSDB)
10 · Handling and storage
4-Methoxy-4-methyl-2-pentanone storage and handling
4-Methoxy-4-methyl-2-pentanone safe storage
Fireproof. Separated from strong oxidants.
Source: ILO-WHO International Chemical Safety Cards (ICSCs)
Planning storage for a mix of chemicals? Check 4-Methoxy-4-methyl-2-pent… in the storage compatibility matrix →
11 · Transport
4-Methoxy-4-methyl-2-pentanone UN number and transport classification
Transport classification is a separate system from the GHS classification above. It decides how a package is marked and how a load may be carried; it does not follow from the workplace label, and the workplace label does not follow from it. The entries below are linked by CAS number, never by name.
4-Methoxy-4-methyl-2-pentanone under UN 2293 — shipping name, class and packing group
Europe · ADR 2025, Table A
| Proper shipping name (3.1.2) | Class | Classification code | PG | Labels (column 5) |
|---|---|---|---|---|
| 4-METHOXY-4-METHYLPENTAN- 2-ONE | 3 | F1 | III | |
Source: ADR 2025, Table A of Chapter 3.2 · ECE/TRANS/352 Vol. I (UNECE). Class 3 is “Flammable liquids” (ADR 2.1.1.1).
United States · 49 CFR 172.101 Hazardous Materials Table
| Proper shipping name (column 2) | Class or division | PG | Labels (column 6) |
|---|---|---|---|
| 4-Methoxy-4-methylpentan-2-one | 3 | III | |
Source: 49 CFR 172.101 Hazardous Materials Table · eCFR, revision 2026-08-03. Class 3 is “Flammable and combustible liquid” (49 CFR 173.2).
12 · Questions
4-Methoxy-4-methyl-2-pentanone — frequently asked questions
What is the CAS number of 4-Methoxy-4-methyl-2-pentanone?
The CAS number of 4-Methoxy-4-methyl-2-pentanone is 107-70-0. Its EC number is 203-512-4.
What does a 4-Methoxy-4-methyl-2-pentanone label have to show?
Under CLP Annex VI the label for 4-Methoxy-4-methyl-2-pentanone carries the pictograms Flame and Exclamation mark and the signal word is Warning.
Is 4-Methoxy-4-methyl-2-pentanone flammable?
Yes. CLP Annex VI assigns 4-Methoxy-4-methyl-2-pentanone H226 — flammable liquid and vapour. The flash point reported for it is 60.56 °C (141 °F) (CAMEO).
Is 4-Methoxy-4-methyl-2-pentanone a carcinogen?
CLP Annex VI records no harmonised carcinogenicity classification for 4-Methoxy-4-methyl-2-pentanone. 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 boiling point of 4-Methoxy-4-methyl-2-pentanone?
The boiling point reported for 4-Methoxy-4-methyl-2-pentanone is 160 °C (320 °F) (ICSC).
What is the melting point of 4-Methoxy-4-methyl-2-pentanone?
The melting point reported for 4-Methoxy-4-methyl-2-pentanone is -30 °C (-22 °F) (ICSC).
How should 4-Methoxy-4-methyl-2-pentanone be stored?
CLP Annex VI assigns 4-Methoxy-4-methyl-2-pentanone the storage statement P403.
Nearby
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