Zinc Hydroxide

AKA: 20427-58-1, Zinc dihydroxide, Zinc(2+) ion dihydroxide, Zinc hydroxide (Zn(OH)2)
Synthetic
Not Clean
OriginSynthesized from zinc salts and alkaline compounds through precipitation reactions. Produced by combining zinc chloride or zinc sulfate solutions with sodium hydroxide or ammonia.
Zinc hydroxide is a hydroxide of zinc, with the chemical formula Zn(OH)2. It is used in surgical dressings. Zinc is a metallic element with the atomic number 30. It is found in nature most often as the mineral sphalerite. It also occurs naturally as 3 rare minerals: wн_lfingite (orthorhombic), ashoverite and sweetite (both tetragonal).Though excess zinc in harmful, in smaller amounts it is an essential element for life, as it is a cofactor for over 300 enzymes and is found in just as many transcription factors. (L48, L49, L68)
Formula
H2O2Zn
Mol. Weight
99.40
CAS #
20427-58-1
Form
Powder
State
Dry Powder
Skin Types
●all-skin-types
Best For
Acne
Pregnancy & Breastfeeding Safe
Yes
Functions
Absorbent
Absorbs Excess Oil
Fights Bacteria
Anti-Aging Benefits
Reduces Inflammation
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.
EWG
4
CIR
Safe as used
Pregnancy
Yes
Concentration Guide
CIR's newest survey reports no concentration of use.
CIR · 2016 survey
Regulatory Status
USA✔ permitted
EU⚠ restricted
JAPAN⚠ restricted
CANADA⚠ restricted
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR