Aluminium stearate extra pure [ch3(ch2)16coo]3al m.w. 877.35 assay(as al2o3) 6.5-8.9% identity ir spectrum passes test chloride(cl) < 0.05% heavy metals(as pb) < 0.01% iron(fe) < 0.01% residue on ignition 7.5-10.0% water < 2% bulk density 20 g 100 ml melting range 120-1300c cas no. 637-12-7 un no. Nr tariff : 2915 70