... white, crystalline powder, colourless crystals or crystalline massesApplication:a Cleaning Agent And Useful Industrial Chemicals For Glasses, Ceramics, Enamel, Metallurgy Etc.Content ... %0.05%Iron (Fe) % ≤0.002%0.005%Properties: White powder crystal, specific weight 1.69-1.73, hardness 2-2 ... /50KG net each. Competitive price Borax pentahydrate for glass making &metallurgy