Methoxyisopropanol
molecular structure · PubChem
AKA: 1-Methoxy-2-propanol, 107-98-2, 1-Methoxypropan-2-ol, Closol, PGME, 2-Propanol, 1-Methoxy-2-hydroxypropane, Dowtherm 209, Propylene glycol monomethyl ether
Synthetic
Fragrance
Solvent
Not Clean
1-methoxypropan-2-ol; propyleneglycol monomethylether
Solubility greater than or equal to 100 mg/mL at 66 °F (NTP, 1992)
Formula
C4H10O2
Mol. Weight
90.12
CAS #
107-98-2
Form
Liquid
State
1-methoxy-2-propanol appears as a colorless liquid. Flash point near 89 °F. Less dense than water. Contact irritates skin, eyes and mucous membranes. Prolonged exposure to vapors may cause coughing, s
Functions
Perfuming
Added for scent. Can be natural or synthetic. Common irritant and allergen — one of the top reasons people react to products.
Solvent
Dissolves other ingredients so they distribute evenly in the formula. Often the invisible "base" everything else is mixed into.
Adds Fragrance
Dissolves Ingredients
Adds pleasant scent
Dissolves other ingredients
Traditional Use
A synthetic solvent developed in the 20th century for industrial and cosmetic use. Functions in cosmetics to improve product spreadability and evaporation characteristics.
EWG
4
CIR
Safe as used
Pregnancy
Caution
Restricted By
CIR Safety Findings
Not a Sensitizer
medical-approval
all-shades-safe
Regulatory Agencies
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Caution
The paper trail
🔬Peer-reviewednone on file
⚖️Regulatory1 listing →
🛡️Safety-assessed1 review →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR