Propylene Glycol Monopropyl Ether
- Glycol ether solvents
- CAS 1569-01-3
- IUPAC: 1-propoxypropan-2-ol
Propylene Glycol Monopropyl Ether (CAS 1569-01-3) appears in 1 of the 1,812 car-care products CarCareTruth tracks (as of June 2026). It is classified as a VOC.
Eye irritation Cat 2 (H319) at ingredient level. No skin sensitizer or respiratory classifications at mixture-relevant concentrations. Classified as Skin Irritation Cat 5 ('may be harmful') in some SDS at ingredient level — below GHS hazard communication threshold for skin at mixture level. Not a Prop 65 substance. Low inhalation concern at ambient temperatures.
Propylene glycol monopropyl ether (1-propoxypropan-2-ol, CAS 1569-01-3) is a glycol ether co-solvent used in surface-cleaning formulas, particularly for removing oxidation haze from polycarbonate headlight lenses. It is chemically related to propylene glycol n-butyl ether and dipropylene glycol methyl ether but offers a slightly shorter carbon chain.
At 25–50% concentration in headlight oxidation-removal wipes, it is the primary active cleaning solvent. The eye irritation classification (H319) at ingredient level carries forward to the mixture-level SDS classification. No Prop 65 listing. Biodegrades in aerobic conditions with low aquatic toxicity concern.
Health & environment profile
- VOC
- yes
- Prop 65 listed
- no
- Asthmagen
- no
- EPA Safer Choice
- no
- Aquatic toxicity
- no
- Biodegradable
- yes
- Bioaccumulative
- no
- Persistent
- no
- Ozone depleting
- no
- Microplastic
- no
- PFAS
- no
- Env. score
- 5/5
Common questions about Propylene Glycol Monopropyl Ether
- What is Propylene Glycol Monopropyl Ether used for in car care?
- Solvent and cleaning agent in headlight oxidation-removal products and surface cleaners; dissolves oxidation haze and yellowing from polycarbonate lenses
- Is Propylene Glycol Monopropyl Ether a VOC?
- Yes. Propylene Glycol Monopropyl Ether is classified as a volatile organic compound (VOC).
- Is Propylene Glycol Monopropyl Ether on California's Proposition 65 list?
- No. Propylene Glycol Monopropyl Ether is not on California's Proposition 65 list.
- Is Propylene Glycol Monopropyl Ether biodegradable?
- Yes. Propylene Glycol Monopropyl Ether has a confirmed biodegradable profile.
1 product contain this
Armor All Ultra Shine Headlight Restoration WipesProp 65headlight-restoration
Related
Health and environment notes translate the manufacturer Safety Data Sheet, the GHS classification, and authoritative regulatory listings (California Prop 65, EPA). Not medical advice. They describe the ingredient itself; whether a hazard applies to a finished product depends on its concentration and how it's used.