ZIRCONIUM HYDROXIDE

ZIRCONIUM HYDROXIDE
PRODUCT IDENTIFICATION
CAS NO.	12688-15-2, 14475-63-9
EINECS NO.	238-472-7
FORMULA	Zr(OH)₄
MOL WT.	159.25
H.S. CODE	2825.90
TOXICITY
SYNONYMS	Zirconium(IV) hydroxide; Zirconiumtetrahydroxide;
Zirconiumtetrahydroxid (German); tetrahidróxido de circonio (Spanish); Tétrahydroxyde de zirconium (French);
CLASSIFICATION
PHYSICAL AND CHEMICAL PROPERTIES
PHYSICAL STATE	White filter cake
MELTING POINT
BOILING POINT
SPECIFIC GRAVITY	3.25
SOLUBILITY IN WATER	insoluble
pH
VAPOR DENSITY
NFPA RATINGS
AUTOIGNITION
FLASH POINT
STABILITY	Stable under normal conditions
APPLICATIONS
Zirconium Hydroxide is used as an intermediate for the manufacture of zirconium compounds. It is used in pigments, glass, and dyes. Generally, Zirconium compounds are used in TiO₂ pigment coating and leather tanning.
SALES SPECIFICATION
APPEARANCE	White filter cake
Zr(Hf)O₂	28.0% min
SiO₂	0.03% max
Fe₂O₃	0.03% max
TiO ₂	0.001% max
TRANSPORTATION
PACKING
HAZARD CLASS
UN NO.
GENERAL DESCRIPTION OF ZIRCONIUM & ITS COMPOUNDS
Zirconium is a metallic transition element in Group IVb of periodic table; symbol Zr, hard, malleable, ductile, lustrous, silvery gray; atomic number 40; atomic mass 91.224; melting point ca 1,852°C; boiling point ca 4,377°C; specific gravity 6.56 g/cm3; valence +2,+3 or +4; electronic config. [Kr]4d25s2. It is light but Its hardness is similar to copper. It has a hexagonal close-packed crystalline structure resembles titanium. It is insoluble in water, soluble in hot or concentrated acids, flammable as powder. Zirconium is mainly (almost 90% among whole zirconium production) used in nuclear reactors due to its property of low absorption for thermal neutrons, in addition to its extremely resistance to heat and corrosion. It is applied in tubes for cladding uranium oxide fuel. Zirconium is a fairly abundant element and the chief ore is zircon (neosilicate mineral occurring in tetragonal prisms, ZrSiO4, also known as hyacinth; jacinth; zirconite) which contains Zirconium and hafnium at a ratio of about 50 : 1. Hafnium which absorbs neutrons readily should be removed for the usage of zirconium in nuclear reactors. The other ores are baddeleyite (the oxide), monazite, ilmenite, and rutile. Zirconium is usually alloyed with other metals to make corrosion-resistant alloys. The chief comsumption in chemical industry field is for piping against corrosion, in ceramic, refractory compounds, pyrotechnics, welding fluxes, and explosives. Zirconium compounds are also used in TiO2 pigment coating and leather tanning. Zirconium forms a number of compounds as below: Zirconia (also known as zirconium oxide or as zirconic anhydride, ZrO2 ): toxic, heavy white powder that is insoluble in water, soluble in mineral acids; melts at 2700°C; used in ceramic glazes, special glasses, as an abrasive, a refractory material, and a component of acid- and alkali-resistant glasses and of ceramics employed in fuel cells and medicine, and to make piezoelectric crystals. Zirconium Acetate (ZrC2H4O2, CAS RN: 7585-20-8) used as a flame retardants for textiles. Zirconium Neodecanoate (ZrC40H76O8, CAS RN: 39049-04-2) Zirconium Acetylacetonate ((C5H7O2)4Zr, CAS RN: 17501-44-9) Zirconium Boride (ZrB2, CAS RN: 12045-64-6): toxic, gray, hard powder; melting at 3000°C; used as an aerospace refractory, in cutting tools, and to protect thermocouple tubes. Zirconium Butoxide (C16H36O4, CAS RN: 1071-76-7) Zirconium Carbide (ZrC, CAS RN: 12070-14-3): Hard, gray crystals or powder; soluble in water and acids; ignites spontaneously in air; melting at 3400°C, boiling at 5100°C; used as an abrasive, refractory, and metal cladding, and in cermets, incandescent filaments, and cutting tools. Zirconium Carbonate (CAS RN: 12671-00-0): white powder used as in manufacturing of zirconium compounds, manufacturing paint drier auxiliaries, pigments, various catalysts and paper sizings. Zirconium Dicarbide (ZrC2, CAS RN: 12340-54-4) Zirconium Fluoride (ZrF4, CAS RN: 7783-64-4, 13569-28-3, 13814-22-7, 13842-94-9) Zirconium Hydride (ZrH2, CAS RN: 7704-99-6, 13940-37-9): flammable, gray-black powder; used in powder metallurgy and nuclear moderators, and as a reducing agent, vacuum-tube getter, and metal-foaming agent. Zirconium Hydroxide (Zr(OH)4 CAS RN:12688-15-2, 14475-63-9): toxic, amorphous white powder; insoluble in water, soluble in dilute mineral acids; decomposes at 550°C; used in pigments, glass, and dyes, and in making other zirconium compounds. Zirconium Iodide (ZrI2, CAS RN: 14728-76-8, 13779-87-8, 15513-85-6) Zirconium Nitrate (CAS RN: 12372-57-5) Zirconium Nitride (ZrN, CAS RN: 25658-42-8): hard, brassy powder that is soluble in concentrated acids; melts at 2930°C; used in refractories, cermets, and laboratory crucibles. Zirconium Oxychloride (ZrOCl2, CAS RN: 7699-43-6): White crystals that are soluble in water, insoluble in organic solvents, and acidic in aqueous solution; used for the manufacture of other zirconium salts, textile dyeing, oil-field acidizing, in cosmetics and greases, and for antiperspirants and water repellents and TIO2 pigment coating. Zirconium Oxynitrate (ZrO(NO3)2, CAS RN:13826-66-9) Zirconium Phosphate (ZrO(H2PO4)2): toxic, dense white powder insoluble in water, soluble in acids and organic solvents; decomposes on heating; used as an analytical reagent, coagulant, and radioactive-phosphor carrier. Zirconium Silicate (ZrO4Si, CAS RN: 10101-52-7) Zirconium silicide (CAS RN: 12039-90-6) Zirconium sulfide (CAS RN: 12039-15-5) Zirconium Tetrachloride (ZrCl4, CAS RN: 10026-11-6): toxic, white lustrous monoclinic crystals; decomposes in water, soluble in alcohol, sublimes above 300°C; used to make pure zirconium and for water-repellent textiles. Zirconium-95: radioactive isotope of zirconium (Half-life of 63 days with beta and gamma radiation); used as a catalyst in a cracking plant and to trace petroleum circulation flows. Zirkelite A black mineral consisting of an oxide of zirconium, titanium, calcium, ferrous iron, thorium, uranium, and rare earths. Calcium Zirconate (CaZrO3 CAS RN: 12013-47-7)
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