Dimethyl Phthalate

AKA: 131-11-3, DIMETHYLPHTHALATE, Avolin, Mipax, Palatinol M, Solvanom, Solvarone, Fermine, Dimethyl o-phthalate
Synthetic
Occlusive
Solvent
Not Clean
OriginDerived from phthalic anhydride and methanol, both petroleum-based chemical compounds. Synthesized through esterification of phthalic anhydride with methanol via acid catalysis.
Dimethyl phthalate has many uses, including in solid rocket propellants, plastics, and insect repellants. Acute (short-term) exposure to dimethyl phthalate, via inhalation in humans and animals, results in irritation of the eyes, nose, and throat. No information is available on the chronic (long-term), reproductive, developmental, or carcinogenic effects of dimethyl phthalate in humans. Animal studies have reported slight effects on growth and on the kidney from chronic oral exposure to the chemical. EPA has classified dimethyl phthalate as a Group D, not classifiable as to human carcinogencity.
Solubility less than 1 mg/mL at 68 °F (NTP, 1992)
Formula
C10H10O4
Mol. Weight
194.18
CAS #
131-11-3
Form
Powder
State
Dimethyl phthalate appears as a water-white liquid without significant odor. Denser than water and insoluble in water. Hence sinks in water. Flash point 300 °F. Eye contact may produce severe irritati
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Caution
Functions
Film Forming
Creates a physical seal on skin to lock moisture in and keep irritants out. The "slugging" ingredient — barrier protection.
Plasticiser
Solvent
Dissolves other ingredients so they distribute evenly in the formula. Often the invisible "base" everything else is mixed into.
Quells irritation
The paper trail
🔬Peer-reviewed1 paper →
⚖️Regulatory1 listing →
🛡️Safety-assessed2 reviews →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
EWG
4
CIR
Safe as used · CIR insufficient data requested (2026)
Pregnancy
Caution
CIR Safety Findings
Not an Eye Irritant
1 study / 1 not irritating (CIR 200)
Not a Sensitizer
1 study / 1 not sensitizing (CIR 200)
Mixed Skin Irritation Results
3 studies / 1 mixed / 2 not irritating (CIR 200)
Regulatory Status
USAunder review
EU⚠ restricted
JAPAN⚠ restricted
CANADA⚠ restricted
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR