murphyHydrolyzed Silk
molecular structure · PubChem
AKA: Silk Hydrolysate, Hydrolyzed Silk Protein
Synthetic
Humectant
Skin Conditioner
Hair Care
Clean
Origin-Derived (silkworm)
Protein hydrolyzates, silk
CAS #
96690-41-4
Form
Liquid
Skin Types
●all-skin-types
Best For
Dryness
Pregnancy & Breastfeeding Safe
Yes
Functions
Antistatic
Hair Conditioning
A catch-all term for ingredients that improve how skin looks and feels — softer, smoother, more supple. The workhorse behind most moisturizers.
Humectant
A moisture magnet. Pulls water from the air and deeper skin layers up to the surface to keep skin plump and hydrated.
Skin Conditioning
A catch-all term for ingredients that improve how skin looks and feels — softer, smoother, more supple. The workhorse behind most moisturizers.
Locks In Moisture
The paper trail
🔬Peer-reviewednone on file
⚖️Regulatory1 listing →
🛡️Safety-assessed3 reviews →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
EWG
1
CIR
Safe as used
Pregnancy
Yes
CIR Safety Findings
Not Phototoxic
Animal test found no phototoxicity in the CIR safety assessment (CIR 699)
Not a Sensitizer
4 studies / 4 not sensitizing (CIR 699)
Mixed Skin Irritation Results
9 studies / 1 irritating / 2 mixed / 6 not irritating / reactions slight to mild (CIR 699)
Mixed Eye Irritation Results
7 studies / 1 irritating / 2 mixed / 4 not irritating / reactions minimal to slight (CIR 699)
Concentration Guide
Leave-on0.0000007–0.23%
Rinse-off0.0000007–0.5%
0%50%100%
CIR reported use · 2014 survey
Regulatory Agencies
Verified Jun 2026
Data: CosIng · EWG · CIR