murphyPolyurethane-42
molecular structure · PubChem
AKA: Polyurethane polymer, Film-forming agent
Synthetic
Occlusive
Not Clean
OriginSynthesized from polyols and isocyanates, belonging to the polyurethane polymer chemical family. Produced through step-growth polymerization where isocyanate groups react with hydroxyl groups.
'Polyurethane-42 is a copolymer of Di-C12-13 Alkyl Tartrate, Hydrogenated Dilinoleyl Alcohol and isophorone diisocyanate
CAS #
1184186-26-2
Form
Powder
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Yes
Functions
Film Forming
Creates a physical seal on skin to lock moisture in and keep irritants out. The "slugging" ingredient — barrier protection.
Creates Protective Barrier
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.
EWG
4
CIR
Safe as used
Pregnancy
Yes
CIR Safety Findings
Mixed Eye Irritation Results
1 study / 1 mixed / reactions moderate (CIR 736)
Concentration Guide
CIR lists it as not reported to be in use.
CIR · report published 2017
Regulatory Agencies
Verified Jun 2026
Data: CosIng · EWG · CIR