Zinc Borate

Description

Zinc Borate · CAS 1332-07-6 · B2O6Zn3. UNII 21LB2V459E. Melting Point: 980 °C; Solubility: 0.3% in water at 20 °C; Density: 3.64 g/cu cm.

Identification

CAS Registry Number	1332-07-6
PubChem CID	167155
Molecular formula	B2O6Zn3
IUPAC name	trizinc diborate
UNII (FDA)	21LB2V459E

Computed Descriptors

Molecular Weight	313.8
Hydrogen Bond Donor Count	0
Hydrogen Bond Acceptor Count	6
Rotatable Bond Count	0
Exact Mass	311.77242
Monoisotopic Mass	309.77552
Topological Polar Surface Area	138
Heavy Atom Count	11
Formal Charge	0
Complexity	8

Physical & Chemical Properties

Melting Point	980 °C
Solubility	0.3% in water at 20 °C
Density	3.64 g/cu cm

Physical description & handling notes

• Zinc borate appears as a white powder of variable composition. (typically 45% ZnO, 34% B2O3 and 20% H2O). Slightly soluble in water. The primary hazard is the threat to the environment. Immediate steps should be taken to limit its spread to the environment. It is used as a fungus and mildew inhibitor, to fire proof textiles, and for other uses.
• White odorless solid; Powder (ceramic grade) = 99.95% pure; Commercial grade = about 50% zinc oxide and 30% boric anhydride; [HSDB] White powder; [MSDSonline]
• White, amorphous powder
• White granular
• None
• Soluble in dilute acids; slightly soluble in water

Regulatory Status

Regulatory & Food Contact	CIR / INCI: Antimicrobial

GHS Hazard Classification

Reported hazard statements	H319

Documented Uses

• Used as flame retardant (PVC, cellulosics, unsaturated halogenated polyesters, polymers, elastomers, paper, paperboard, textiles, and textile coatings), fungicide, and ceramics flux; [HSDB]
• Pulp and Paper Processing [Category: Industry]
• Textiles (Printing, Dyeing, or Finishing) [Category: Industry]
• Medicine, fireproofing textiles, fungistat and mildew inhibitor, flux in ceramics
• Effective in enhancing the flame-inhibiting powers of chlorine
• For more Uses (Complete) data for ZINC BORATE (7 total), please visit the HSDB record page.

Synonyms

Boric acid (HBO2), zinc salt (2:1); RefChem:1080091; DTXSID901340531; 238-763-9; 14720-55-9; ZINC BORATE; trizinc;diborate; Firebrake ZB; 21LB2V459E; Diboron zinc tetraoxide; Bonrex FC; Flamtard Z 10; ZT (fire retardant); Alcanex FR 100; Alcanex FRC 600; Climax ZB 467

Frequently Asked Questions

What are the CAS number and molecular formula of Zinc Borate?

CAS 1332-07-6; molecular formula B2O6Zn3; molecular weight — g/mol.

What other names is Zinc Borate known by?

Boric acid (HBO2), zinc salt (2:1), RefChem:1080091, DTXSID901340531, 238-763-9, 14720-55-9, ZINC BORATE.

What is the regulatory status of Zinc Borate?

Documented regulatory listings: CIR / INCI: Antimicrobial.

Is Zinc Borate classified as hazardous?

Hazard statements reported: H319.

What are the key physical properties of Zinc Borate?

Melting Point: 980 °C; Solubility: 0.3% in water at 20 °C; Density: 3.64 g/cu cm.

Facts on this page are taken from PubChem (US National Library of Medicine) and Wikidata. Grade-specific data — assay, moisture, particle size, packaging, shelf life — is issued per batch on the COA and is not published here.