Collodion
molecular structure · PubChem
AKA: Cellulose nitrate solution, Pyroxylin
Synthetic
Occlusive
Not Clean
Flexible Colloidon is a mixture of Collodion, camphor and castor oil
Effective at 20.52%
CAS #
8050-70-2
Form
Powder
Functions
Film Forming
Creates a physical seal on skin to lock moisture in and keep irritants out. The "slugging" ingredient — barrier protection.
Strengthens Barrier
Fights Acne
Creates protective layer
Traditional Use
Developed in the 1840s as a liquid preparation of nitrocellulose dissolved in ether and alcohol; it was historically used as a protective film-forming agent in cosmetics and medicinal preparations.
EWG
4
CIR
Safe as used
Pregnancy
Caution
CIR Safety Findings
Not an Irritant
medical-approval
all-shades-safe
Concentration Guide
0.04%
41.0%
0%57%
Reported use
CIR reported use: 0.04-41
Regulatory Agencies
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Caution
The paper trail
🔬Peer-reviewed1 paper →
⚖️Regulatory0 listings
🛡️Safety-assessed1 review →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
Verified Jun 2026
Data: CosIng · EWG · CIR