ZINC BORATE

PRODUCT IDENTIFICATION

CAS NO. 1332-07-6, 138265-88-0, 149749-62-2
EINECS NO. 215-566-6
FORMULA 2ZnO.3B2O3.3.5H2O
MOL WT. 434.62

H.S. CODE

 
TOXICITY Oral rat LD50; 10000 mg/kg
SYNONYMS Boric acid, zinc salt; Borsäure, Zinksalz (German);
ácido bórico, sal de cinc (Spanish); Acide borique, sel de zinc (French);
SMILES  

CLASSIFICATION

 

PHYSICAL AND CHEMICAL PROPERTIES

PHYSICAL STATE White crystalline powder
MELTING POINT

 

BOILING POINT  
SPECIFIC GRAVITY  
SOLUBILITY IN WATER Insoluble
pH 7.6
VAPOR DENSITY  

AUTOIGNITION

 

NFPA RATINGS

 

REFRACTIVE INDEX

 

FLASH POINT

 

STABILITY Stable under ordinary conditions

APPLICATIONS

Zinc Borate is used as a flame retardant and smoke suppressant for wide range of plastics, rubbers, paper and textiles. It can replace antimony oxide as a synergist in plastics and rubber to enhance the activity of primary flame retardants by stepwise releasing the radicals. in a wide variety of end-use products including . It is also used in paints, adhesives, pigments and ceramic industries. It also acts as an antifungal agent and as a soil amendment to improve the vigor of plants.
SALES SPECIFICATION

APPEARANCE

White crystalline powder

ZnO

36.0% - 39.0%

B2O3

46.5% - 49.5%

WATER

0.5% max

RESIDUE ON IGNITION

0.5% max

PARTICLE SIZE 8-20 um (mean)
TRANSPORTATION
PACKING 40kgs in bag
HAZARD CLASS Not regulted
UN NO.  
GENERAL DESCRIPTION OF FLAME RETARDANT AGENT
Flame Retardant are substances that can be chemically inserted into the polymer molecule or be physically blended in polymers after polymerization to suppress, reduce, delay or modify the propagation of a flame through a plastic materials. There are several classes of flame retardants; Halogenated Hydrocarbons (Chlorine and Bromine containing compounds and reactive flame retardants), Inorganic flame retardants ( Boron compounds, Antimony oxides, Aluminium Hydroxide, molybdenum compounds, zinc and magnesium oxides ), Phosphorous containing compounds (Organic phosphate esters, phosphates, halogenated phosphorus compounds and inorganic phosphorus containing salts).

Class of Flame Retardants

  • Inorganic
    • Metal hydroxides
      • Aluminium hydroxide
      • Magnesium hydroxide
      • Orthers
    • Antimony compounds
      • Antimony trioxide
      • antimony pentoxide
      • Sodium antimonate
      • Others
    • Boron compounds
      • Boric acid
      • Borax
      • Zinc borate
      • Others
    • Other metal compounds
      • Molybdenum compounds
      • Titanium compounds
      • Zirconium compounds
      • Zinc compounds
        • Zinc stannate
        • Zinc hydroxy-stannate
        • Others
      • Others
    • Phosphorus compounds
      • Red phosphorus
      • Ammonium polyphosphate
      • Others
    • Other inorganic flame retardants
      • ammonium sulfamate
      • ammonium bromide
      • Others
  • Halogenated organic
    • Brominated
      • Tetrabromobisphenol A
      • Decabromodiphenyl ether
      • Octabromobiphenyl ether
      • Tetrabromobiphenyl ether
      • Hexabromocyclododecane
      • Tribromophenol
      • Bis(tribromophenoxy) ethane
      • Tetrabromobisphenol A polycarbonate oligomers
      • Tetrabromobisphenol A epoxy oligomers
      • Others
    • Chlorinated
      • Chlorinated paraffins
      • Bis(hexachlorocyclopentadieno)cyclo-octane
      • Others
  • Organophosphoros
    • Non-halogenated compounds
      • phosphate esters
        • Ttrialkyl phosphates
        • Triaryl phosphates
        • Aryl-alkyl phosphates
        • Others
      • polyols
      • phosphonium derivatives
      • phosphonates
      • Others
    • Halogenated phosphates
      • Tris(1-chloro- 2-propyl) phosphate
      • Tris(2-chloroethyl) phosphate
      • Tris(2,3-dibromopropyl)phosphate
      • Others
  • Nitrogen-based
    • Polyurethanes
    • Polyamides
    • Melamine and its salts
    • Guanidine compounds
    • Others 

GENERAL DESCRIPTION OF BORIC ACID

Boric acid refers to 3 compounds; orthoboric acid (also called boracic acid, H3BO3 or B2O3·3H2O), metaboric acid (HBO2 or B2O3·H2O), and tetraboric acid (also called pyroboric, H4B4O7 or B2O3·H2O). Orthoboric acid dehydrates to form metaboric acid and tetraboric acid above 170 C and 300C respectively. Orthoboric acid is derived from boric oxide in the form of white, triclinic crystals. It is poorly soluble in cold water but  dissolves readily in hot water, in alcohol and glycerine. Metaboric acid is a white, cubic crystalls. It is soluble in water slightly. Tetraboric acid is a white solid soluble in water. When tetraboric and metaboric acid are dissolved, it reverts to orthoboric acid. The main uses of boric acid is to make borate salts such as borax and other boron compounds. Boric acid is also used in heat resistant glass, in fireproofing fabrics, in electroplating baths, in leather manufacturing, porcelain enamels and in hardening steels. Boric acid has antiseptic and antiviral activity. Aqueous solutions have been used as mouth-washes, eye-drops, skin lotions and cosmetics. Boric acid and its salts are components of many commercial insecticides and wood preservatives.