Detailed Product Description

Specifications: 1) Assay: 99.0% ~ 100.5% 2) Identification: positive 3) Melting point: about 190. 7degree ~ 190.8 degree 4) Clarity of solution: clear 5) Color of solution: BY7 max. 6) PH value: 2.1 ~ 2.6 (in 2% solution) 7) Oxalic acid: 0.2% max. 8) Heavy metals: 5ppm max. 9) Ferrite: 2ppm max. 10) Arsenic: 3ppm max. 11) Mercury: 1ppm max. 12) Lead: 5ppm max. 13) Sulphate ash: 0.1% max. 14) Copper salt: 5ppm max. 15) Specific rotation: +20.5 degree ~ +21.5 degree 16) Organic volatile impurities: meets requirements 17) Particle size: 100% pass thru 40 mesh; 50% pass thru 80 mesh 18) Appearance: white crystalline powder 19) Storage: stored in cool and dry place 20) Shelf life: three years in dry conditions after production Packing: Net weight 25kg carton boxes with PE liner