We are offering aluminium (fine powder) al at.w. 26.98 assay min. 99.7% maximum limits of impurities : iron 0.17% copper 0.00159% silicon 0.1313% manganese 0.0023% magnesium 0.00160% zinc 0.0053% difficult to ship due to hazard incompatibility cas no : 7429-90-5 un no. Nr tariff : 7603 10 10 f :