ALUMINIUM HYDROXIDE (Hydrated Alumina)

ALUMINIUM HYDROXIDE
PRODUCT IDENTIFICATION
CAS NO.	21645-51-2
EINECS NO.	244-492-7
FORMULA	Al(OH)₃
MOL WT.	78
H.S. CODE	2818.30
TOXICITY
SYNONYMS	Hydrated alumina; Alumina hydrate; Alumina trihydrate;
ATH; Aluminum hydrate; Aluminum trihydrate; Alhydrogel; Superfos; Amphogel; Aluminum (III) hydroxide; Amorphous alumina; Trihydrated Alumina; Trihydroxyaluminum;
RAW MATERIALS
CLASSIFICATION
GENERAL DESCRIPTION
Hydrated alumina, also known as alumina trihydrate (ATH), or simply hydrate, is more accurately chemically designated as aluminum trihydroxide, Al(OH)3. It is a non-abrasive powder with a Mohs' hardness index of 2.5 - 3.5 and a specific gravity of 2.42. Alumina trihydrate is the largest volume flame retardant used in the world. On heating to 200°C, hydrated alumina decomposes into 66% alumina and 34% water. This irreversible process is, in part, what makes ATH an effective flame retardant. Aluminium hydroxide is also used as an adsorbent, emulsifier, ion exchanger, mordant, antacid, and filtering medium. It is also used in the manufacture of paper, ceramics, printing inks, detergents, for waterproofing fabrics and in dentrifrices and antiperspirants
PHYSICAL AND CHEMICAL PROPERTIES
PHYSICAL STATE	odorless white powder
MELTING POINT	300 C
BOILING POINT
SPECIFIC GRAVITY	2.42
SOLUBILITY IN WATER	`insoluble`
pH	weak basic
VAPOR DENSITY
AUTOIGNITION
NFPA RATINGS	Health: 1; Flammability: 0; Reactivity: 0
REFRACTIVE INDEX
FLASH POINT	Not considered to be a fire hazard
STABILITY	Stable under ordinary conditions
APPLICATIONS
Production of aluminum chemicals. Major products include alum (aluminum sulfate), poly aluminum chloride (PAC), sodium aluminate, zeolites, aluminum fluoride. A raw material in the manufacture of glass, glazes and frits . A raw material in catalyst production . A flame retardant and smoke suppressant filler in plastics like: cables, rubber products and carpet backing. A raw material for fertilizers, and fibre cement board products. An extender and bodying agent in paper, solvent- and water-borne paints, UV curable coatings, inks, and adhesives. A polishing and cleansing agent, mould wash and separating agent A filler of cast polymer products such as onyx and solid surfaces.
SALES SPECIFICATION
APPEARANCE	white powder
Al(OH)₃	99.5% min
Al₂O₃	64.0% min
SiO₂	0.015% max
Fe₂O₃	0.02% max
MOISTURE	8.0% - 10.0%
LOSS ON IGNITION	34.0 - 35.0%
WHITENESS	85% min
PARTICLE SIZE	+150um (3.0% max) +75um (45.0% max) +45um (40.0%max) -26um (8.0% max)
TRANSPORTATION
PACKING	25kgs, 50kgs, 1mt in Bag
HAZARD CLASS
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