Molekula
Zinc Hydroxide
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 2000 · Listed pack sizes are a starting point — we manufacture, source and repack to the quantity you need
Zinc Hydroxide is an inorganic compound with the chemical formula H4O2Zn, primarily used in pharmaceuticals, cosmetics, and as a mild antiseptic or astringent. It also serves as a stabilizer in rubber manufacturing and is used as an absorbent in surgical dressings. This white, amorphous powder has a CAS number of 20427-58-1 and a molecular weight of 99.4. It should be stored at ambient conditions, with a signal word of Danger due to its hazardous nature. Molekula supplies Zinc Hydroxide from research to bulk quantities with full documentation and ISO 9001:2015 traceability.
Example image for illustration only. Other packaging and pack sizes are available.
Pricing & pack sizes
Pack sizes & pricing
Pricing on request — packs available from research to bulk quantities.
Need a different quantity or pack?
Tell us how much you need and when — drums, IBCs, sacks or a one-off bulk lot. We'll manufacture or source it and come back with a price.
Prices exclude VAT/sales tax and shipping.
Specifications
| Property | Value |
|---|---|
| Appearance | White powder |
| Chloride (Cl-) | ≤0.005% |
| Assay | ≥99.0% |
| Insoluble Matter | ≤0.01% in sulfuric acid |
| Heavy Metals (Pb) | ≤0.005% |
| Iron (Fe) | ≤0.002% |
| Sulphates (SO4)(2-) | ≤0.02% |
| Nitrate (NO3-) | ≤0.02% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Transport Class | 9 |
| Packing Group | III |
| Acidity | Base |
Identification
| Property | Value |
|---|---|
| SKU | 89984252 |
| CAS Number | 20427-58-1 |
| IUPAC Name | zinc dihydroxide |
| Molecular Formula | H4O2Zn |
| Molecular Weight | 99.4 |
| Exact Mass | 97.9346 |
| SMILES | [OH-].[OH-].[Zn+2] |
| InChIKey | UGZADUVQMDAIAO-UHFFFAOYSA-L |
| InChI | InChI=1S/2H2O.Zn/h2*1H2;/q;;+2/p-2 |
| PubChem CID | 9812759 |
| UN Number | UN3077 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 28259090 |
| Tariff Code | 2825908590 |
Safety & GHS
-
Corrosive
GHS05
-
Health Hazard
GHS07
-
Hazardous to the Environment
GHS09
Hazard statements
- H302 Harmful if swallowed
- H318 Causes serious eye damage
- H411 Toxic to aquatic life with long lasting effects
Precautionary statements
- P264 Wash thoroughly after handling
- P270 Do not eat, drink or smoke when using this product
- P273 Avoid release to the environment
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P301+312 IF SWALLOWED: Call a POISON CENTER or doctor/physician if you feel unwell
- P305+351+338 IF IN EYES: Rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing
Documents
Certificate of Analysis (CoA) by batch
Enter a lot or batch number to retrieve the CoA for that specific batch. We can generate one from spec data if no PDF is on file.
Synonyms
- O2Zn
Frequently asked questions
What is zinc hydroxide commonly used for?
Zinc hydroxide is primarily used in pharmaceuticals (e.g., topical ointments for skin conditions), as a precursor for other zinc compounds, and in corrosion protection coatings.
What is the chemical formula and molecular weight of zinc hydroxide?
The chemical formula is H₄O₂Zn (or Zn(OH)₂), and the molecular weight is 99.4 g/mol.
What safety classification does zinc hydroxide have?
Zinc hydroxide is classified with the Signal Word: Danger due to its potential hazards, including irritation and environmental risks.
How should zinc hydroxide be stored?
Store zinc hydroxide in a cool, dry place at ambient temperature, away from incompatible substances and moisture.
Does Molekula supply zinc hydroxide in bulk quantities?
Yes, Molekula can supply zinc hydroxide in bulk, with quantities tailored to your specific requirements—please contact us for details.
What documentation is provided with a zinc hydroxide order?
Each order includes a Certificate of Analysis (CoA), Material Safety Data Sheet (MSDS/SDS), and batch-specific documentation for traceability.
Ready to order or need a custom pack?
Tell us the product, grade, and quantity — Molekula usually responds within one working day with pricing and lead time.