Substance profile
1-Methoxy-2-propanol
1-Methoxy-2-propanol is a colorless liquid with a weak pleasant odor.
01 · Identification
What 1-Methoxy-2-propanol is
1-Methoxy-2-propanol is a colorless liquid with a weak pleasant odor. Its molecular formula is C4H10O2 and its molecular weight is 90.12 g/mol. It boils at 120 °C, melts at -95 °C.
Under the GHS it carries the signal word Warning. It is classed as flammable agents - 3rd degree.
02 · Identifiers
1-Methoxy-2-propanol identifiers and molecular data
1-Methoxy-2-propanol CAS number and EC number
1-Methoxy-2-propanol molecular formula and molecular weight
Other names for 1-Methoxy-2-propanol
- monopropylene glycol methyl ether
03 · GHS classification
1-Methoxy-2-propanol hazard classification
Harmonised classification under CLP Annex VI. This is the legally binding classification in the EU; other jurisdictions may differ.
1-Methoxy-2-propanol pictograms and signal word
1-Methoxy-2-propanol hazard class and category
| Hazard class | Category | From code | Pictogram |
|---|---|---|---|
| Flammable liquids GHS chapter 2.6 | Category 3 | H226 | GHS02 |
| Specific target organ toxicity - single exposure GHS chapter 3.8 | Category 3 narcotic | H336 | GHS07 |
1-Methoxy-2-propanol hazard statements (H-codes)
| Code | Hazard statement |
|---|---|
| H226 | Flammable liquid and vapour. |
| H336 | May cause drowsiness or dizziness. |
This page lists only the codes assigned to 1-Methoxy-2-propanol. 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 1-Methoxy-2-propanol
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 1-Methoxy-2-propanol 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
1-Methoxy-2-propanol precautionary statements
CLP Annex VI assigns 5 precautionary statements to 1-Methoxy-2-propanol. 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.
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
1-Methoxy-2-propanol 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 | 1-метокси-2-пропанол метилов етер на монопропиленгликола |
| Spanish español | 1-Metoxi-2-propanol éter monometílico de propilenglicol |
| Czech čeština | 1-methoxypropan-2-ol propylenglykolmonomethylether |
| Danish dansk | 1-methoxy-2-propanol monopropylenglycolmethylether |
| German Deutsch | 1-Methoxy-2-propanol Monopropylenglycolmethylether |
| Estonian eesti | 1-metoksü-2-propanool monopropüleenglükoolmetüüleeter |
| Greek ελληνικά | 1-μεθοξυ-2-προπανόλη μεθυλαιθέρας μονοπροπυλενογλυκόλης |
| English English | 1-methoxy-2-propanol monopropylene glycol methyl ether |
| French français | 1-méthoxy-2-propanol éther méthylique de monopropylène glycol |
| Croatian hrvatski | 1-metoksi-2-propanol monopropilen-glikol-metil-eter |
| Italian italiano | 1-metossi-2-propanolo propilene glicol mono metil etere |
| Latvian latviešu | 1-metoksi-2-propanols monopropilēnglikola metilēteris |
| Lithuanian lietuvių | 1-metoksi-2-propanolis monopropilenglikolio metileteris |
| Hungarian magyar | 1-metoxi-2-propanol monopropilén-glikol-metil-éter |
| Maltese Malti | 1-metossi-2-propanol eter tal-metil tal-glikol tal-monopropilen |
| Dutch Nederlands | 1-methoxypropaan-2-ol propyleenglycolmonomethylether |
| Polish polski | 1-metoksypropan-2-ol eter monometylowy glikolu propylenowego |
| Portuguese português | 1-metoxi-2-propanol éter metílico de monopropilenoglicol |
| Romanian română | 1-metoxi-2-propanol eter monometilic al propilen-glicolului |
| Slovak slovenčina | 1-metoxypropán-2-ol |
| Slovenian slovenščina | 1-metoksipropan-2-ol monopropilen glikol metil eter |
| Finnish suomi | 1-metoksi-2-propanoli monopropyleeniglykolimetyylieetteri |
| Swedish svenska | 1-metoxi-2-propanol monopropylenglykolmetyleter |
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
1-Methoxy-2-propanol GHS label elements
Everything CLP Annex VI fixes for 1-Methoxy-2-propanol, laid out the way it appears on a label. The greyed lines are the parts only the supplier can fill in.
Warning
1-Methoxy-2-propanol
- Flammable liquid and vapour.
- May cause drowsiness or dizziness.
- 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.
- Store in a well-ventilated place.
Supplier name, address and telephone number· Product identifier·Nominal quantity
Need this as an actual label? Open 1-Methoxy-2-propanol in the GHS label constructor →
07 · Health hazards
1-Methoxy-2-propanol health hazards and exposure limits
1-Methoxy-2-propanol occupational exposure limits
| Limit | Value | Source |
|---|---|---|
| PEL | none See Appendix G | The National Institute for Occupational Safety and Health (NIOSH) |
| REL | 100 ppm (360 mg/m³) | Occupational Safety and Health Administration (OSHA) |
| REL | 150 ppm (540 mg/m³) | Occupational Safety and Health Administration (OSHA) |
| REL | TWA 100 ppm (360 mg/m3) ST 150 ppm (540 mg/m3) | The National Institute for Occupational Safety and Health (NIOSH) |
| IDLH | N.D. | The National Institute for Occupational Safety and Health (NIOSH) |
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
1-Methoxy-2-propanol 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.
1-Methoxy-2-propanol boiling point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Boiling point | 120 °C (248 °F) | HSDB | |
| 120 °C (248 °F) | at 760 mmHg | CAMEO |
1-Methoxy-2-propanol melting point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Melting point | -95 °C (-139 °F) | HSDB |
1-Methoxy-2-propanol density
| Property | Value | Conditions | Source |
|---|---|---|---|
| Density | 0.96 g/cm³ | NIOSH | |
| 0.962 g/cm³ | at 20 °C | HSDB | |
| 0.924 g/cm³ | at 20 °C | CAMEO |
1-Methoxy-2-propanol solubility
| Property | Value | Conditions | Source |
|---|---|---|---|
| Solubility | Miscible with water | HSDB | |
| Miscible in all proportions with organic solvents | HSDB | ||
| In water, 100 mg/mL at 19 °C | at 19 °C | HSDB |
1-Methoxy-2-propanol vapor pressure
| Property | Value | Conditions | Source |
|---|---|---|---|
| Vapor pressure | 12.5 mmHg | at 25 °C | HSDB |
| 12 mmHg | at 25 °C | NIOSH | |
| 11.8 mmHg | at 25 °C | CAMEO |
1-Methoxy-2-propanol flash point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Flash point | 32.22 °C (90 °F) | HSDB | |
| 36.11 °C (97 °F) | HSDB |
1-Methoxy-2-propanol autoignition temperature
| Property | Value | Conditions | Source |
|---|---|---|---|
| Autoignition temperature | 270 °C (518 °F) | at 759.813 mmHg | HSDB |
| 270 °C (518 °F) | ICSC |
1-Methoxy-2-propanol lower explosive limit (LEL)
| Property | Value | Conditions | Source |
|---|---|---|---|
| Lower explosive limit (LEL) | 1.6 % by volume | NIOSH | |
| 1.9 % by volume | ICSC |
1-Methoxy-2-propanol upper explosive limit (UEL)
| Property | Value | Conditions | Source |
|---|---|---|---|
| Upper explosive limit (UEL) | 13.8 % by volume | NIOSH | |
| 18.8 % by volume | CAMEO | ||
| 13.1 % by volume | ICSC |
1-Methoxy-2-propanol vapor density
| Property | Value | Conditions | Source |
|---|---|---|---|
| Vapor density | 3.11 (air = 1) | HSDB |
1-Methoxy-2-propanol odor threshold
| Property | Value | Conditions | Source |
|---|---|---|---|
| Odor threshold | The odor of could be detected at 10 ppm. | propylene glycol monomethyl ether | HSDB |
| Odor Threshold Low: 10.0 [ppm] | Haz-Map | ||
| Odor Threshold High: 100.0 [ppm] | Haz-Map |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
09 · Fire and explosion
1-Methoxy-2-propanol 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.
1-Methoxy-2-propanol fire potential
Moderate, when exposed to heat or flame
Source: Hazardous Substances Data Bank (HSDB)
10 · Handling and storage
1-Methoxy-2-propanol storage and handling
1-Methoxy-2-propanol safe storage
Fireproof. Cool. Keep in the dark.
Source: ILO-WHO International Chemical Safety Cards (ICSCs)
1-Methoxy-2-propanol storage conditions
Keep container tightly closed in a dry and well-ventilated place. Containers which are opened must be carefully resealed and kept upright to prevent leakage. Air sensitive. Forms explosive peroxides on prolonged storage. may form peroxided on contact with air.
Source: Hazardous Substances Data Bank (HSDB)
1-Methoxy-2-propanol incompatible materials
Strong oxidizing agents.
Source: Hazardous Substances Data Bank (HSDB)
1-Methoxy-2-propanol reactivity
1-METHOXY-2-PROPANOL is a methoxy alcohol derivative. The ether being relatively unreactive. Flammable and/or toxic gases are generated by the combination of alcohols with alkali metals, nitrides, and strong reducing agents. They react with oxoacids and carboxylic acids to form esters plus water. Oxidizing agents convert them to aldehydes or ketones. Alcohols exhibit both weak acid and weak base behavior. They may initiate the polymerization of isocyanates and epoxides.
Source: CAMEO Chemicals
Planning storage for a mix of chemicals? Check 1-Methoxy-2-propanol in the storage compatibility matrix →
11 · Transport
1-Methoxy-2-propanol 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.
1-Methoxy-2-propanol under UN 3092 — shipping name, class and packing group
Europe · ADR 2025, Table A
| Proper shipping name (3.1.2) | Class | Classification code | PG | Labels (column 5) |
|---|---|---|---|---|
| 1-METHOXY-2-PROPANOL | 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) |
|---|---|---|---|
| 1-Methoxy-2-propanol | 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
1-Methoxy-2-propanol — frequently asked questions
What is the CAS number of 1-Methoxy-2-propanol?
The CAS number of 1-Methoxy-2-propanol is 107-98-2. Its EC number is 203-539-1.
What is the chemical formula of 1-Methoxy-2-propanol?
The molecular formula of 1-Methoxy-2-propanol is C4H10O2 and its molecular weight is 90.12 g/mol.
What does a 1-Methoxy-2-propanol label have to show?
Under CLP Annex VI the label for 1-Methoxy-2-propanol carries the pictograms Flame and Exclamation mark and the signal word is Warning.
Is 1-Methoxy-2-propanol flammable?
Yes. CLP Annex VI assigns 1-Methoxy-2-propanol H226 — flammable liquid and vapour. The flash point reported for it is 32.22 °C (90 °F) (HSDB).
Is 1-Methoxy-2-propanol a carcinogen?
CLP Annex VI records no harmonised carcinogenicity classification for 1-Methoxy-2-propanol. 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 1-Methoxy-2-propanol?
The US occupational exposure limit reported for 1-Methoxy-2-propanol is none See Appendix G (The National Institute for Occupational Safety and Health (NIOSH)). 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 1-Methoxy-2-propanol?
The boiling point reported for 1-Methoxy-2-propanol is 120 °C (248 °F) (HSDB).
What is the melting point of 1-Methoxy-2-propanol?
The melting point reported for 1-Methoxy-2-propanol is -95 °C (-139 °F) (HSDB).
How should 1-Methoxy-2-propanol be stored?
CLP Annex VI assigns 1-Methoxy-2-propanol the storage statement P403. Keep container tightly closed in a dry and well-ventilated place. Containers which are opened must be carefully resealed and kept upright to prevent leakage. Air sensitive. Forms explosive peroxides on prolonged storage. may form peroxided on contact with air. (Hazardous Substances Data Bank (HSDB))
Nearby
Substances next to 1-Methoxy-2-propanol
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