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
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