murphyHydrated Silica
AKA: Silica hydrate, Hydrosilicic acid, Silicon dioxide hydrate, SILICIC ACID (MART.), SILICIC ACID [MART.], Zarazyl, Zarasyl Companion
The New Tendency Complete Set
Nécessaire
The Hand Cream + The Tube Key
Nécessaire
holi (pearly) whites probiotic whitening toothpaste
Agent Nateur
The New Tendency Duo
Nécessaire
Double Polishing Peel
Alpyn Beauty
Line-Filling Eye Balm
Alpyn Beauty
The Radiance Ritual
Alpyn Beauty
5 Minute Facial
Tata Harper Skincare
Raw Honey Crystal Mask
Tata Harper Skincare
Superkind Fortifying Moisturizer
Tata Harper Skincare
The Hand Duo
Nécessaire
The Hand-Lip Moisture Duo
Nécessaire
Synthetic
Clean
OriginDerived from silicon dioxide (SiO₂), a naturally occurring mineral compound found in sand and quartz deposits. Produced through precipitation or gel-drying processes that add water molecules to create the hydrated silica structure.
Silicic acid; synthetic amorphous silicon dioxide
Formula
H2O3Si
Mol. Weight
78.10
CAS #
10279-57-9, 1343-98-2, 7631-86-9, 112926-00-8, 63231-67-4
Form
Powder
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Yes
Functions
Abrasive
Absorbent
Anticaking
Bulking
Opacifying
Viscosity Controlling
Physical Exfoliant
Absorbs Excess Oil
Prevents Clumping
Adds Body & Volume
Antioxidant Protection
Locks In Moisture
Reduces Inflammation
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
2
CIR
Safe as used
Pregnancy
Yes
CIR Safety Findings
Not a Sensitizer
4 studies / 4 not sensitizing (CIR 466 and 769)
Mixed Eye Irritation Results
6 studies / 1 irritating / 2 mixed / 3 not irritating / reactions slight (CIR 466 and 769)
Mixed Skin Irritation Results
7 studies / 3 mixed / 4 not irritating / reactions slight (CIR 466 and 769)
Concentration Guide
Leave-on0.0002–10%
Rinse-off0.00001–33.8%
0%50%100%
CIR reported use · 2018 survey
Regulatory Agencies
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR