We supply and export various kinds of Aluminium Hydyoxide super-micro powder as follows, should you be of interest, pls do not hesitate to contact us. Here is the specification in details for your check Aluminium Hydroxide CAS No.：21645-51-2 molecular formula: Al(OH)3 molecular weight: 78 Al(OH)3: 99% min. Al2O3: 64% min SiO2: 0.06% max. Fe2O3: 0.02% max. Na2O: 0.3% max. L. O. I.: 35% max pH: 7.5~9.8 Moisture: 0.5% max. Adsorption(ml/100g): 45 max. Whiteness: 96% min. Particle Size: D50: 1um max. + 200 mesh: 0% + 325 mesh: 0.1% max. Refractive index : 1.57