Molecular Formula: B₂H₈O₈Zn
Molar mass: 223.07 g/mol
Density: 4.22 g/cm³
Structure of Zinc borate 3.5 hydrate (CAS NO.12513-27-8):
           
Appearance: No rules (or diamond) white or light yellow powder
Stable: Good thermal stability. Easy to disperse
Solubility: Not dissolve in water, Ethanol , Butanol , Benzene , Acetone , soluble in Hydrochloric acid , Sulfuric acid , Dimethyl sulfoxide
Product categories of Zinc borate 3.5 hydrate (CAS NO.12513-27-8): Cb boride;Inorganic chemical products;Salts
 

 Zinc borate 3.5 hydrate (CAS NO.12513-27-8) can be used for flame retardant of a variety of engineering plastics, rubber products, paints, textiles and others. And it is also used in medicine, waterproof fabric, ceramic glaze, paint mildew, Fungicides, fungicides and so on.

Production methods: zinc oxide approach: First, filling with a certain concentration of Boric acid media solution in the crystallization device, then inputs a certain ratio of Zinc oxide and Boric acid , at the 80 ~ 100 °C reacting for 5 ~ 7h, and then filtered, washing, drying, and grinding, at last, obtain the product: Zinc borate 3.5 hydrate (CAS NO.12513-27-8). Its
2ZnO +6 H₃BO₃ → 2ZnO · 3B₂O₃ · 3.5 H₂O +5.5 H₂O
Zinc hydroxide method: Its
2Zn (OH) ₂ +6 H₃BO₃ → 2ZnO · 3B₂O₃ · 3.5 H₂O +7.5 H₂O Borax approach: using Zinc sulfate , Boric acid and Zinc oxide in the molar ratio of 7:7:1, reacting at 95 °C to obtained Zinc borate . its
3.5Na₂B₄O₇ +3.5 ZnSO₄ +0.5 ZnO → 2 (2Zn_0.3B₂O₃ · 3.5H₂O) +3.5 Na₂SO₄ +2 H₃BO₃

 Zinc borate 3.5 hydrate ,its cas register number is 12513-27-8. It also can be called Zinc borate oxide 3.5 hydrate and Zincboratehydrate .