ZINC BORATE (BORIC ACID, ZINC SALT)

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.