aluminium hydroxide  cas no.: 21645-51-2 einecs no.: 244-492-7 formula: al(oh)3 mol wt.: 78  h.s. code: 2818.30 hydrate alumina ath, aluminium hydroxide, artifical marble,artificial onyx filler,granite &stone,ath1000 alumina, ath, surface coated ath, h-wf-14, aluminium hydroxide, flame retardant, artifical marble, toothpaste abradant, flame retardant, kingway chemicals.artificial onyx filler, etc,   regarding aluminium hydroxide for artifical marble, toothpaste abradant, flame retardant, artificial onyx filler, etc, spec:  aluminum hydroxide h-wf-90,h-wf-75,h-wf-50sp,h-wf-25,h-wf-20,h-wf-14,h-wf-10,h-wf-1 physical properties :  appearance: white powder molecular formula: al( oh) 3 molecular weight: 78.0 cas no.: 21645-51-2 bulk deity( g/ cm3) : loosed: 1.1 packed: 1.3 deity( g/ cm3) : 2.42 shelf life: longer than 2 yea.  chemical properties :  al( oh) 3: 99.6% min. al2o3: 65.1% min. sio2: 0.03% max. fe2o3: 0.02% max. na2o: 0.2% max. l.o.i.: 35% max. moisture: 0.1% max. ph: 7.5~ 10 whiteness: 93% min. particle size: d50: 75~ 95um packing: in 25 kgs bags,   we have different size, fine, ultra fine, and also coated by silane or stearic acid. particle size d50: 90um, 75~ 90um, 50um, 25um, 20um, 14um, 10um, 5um, 3um, 1um.  best regards  yang haitao  henan kingway chemicals co., ltd.