Item
Standard
Results
Appearance
Grey-white or white crystal
White crystal
Purity
≥99.5%
99.93%
Melting point
≥190.5℃
192.9℃
Water content
≤0.15%
0.03%
Ash content
≤0.05%
0.02%
Cu
≤2ppm
0.00ppm
Ca
≤2ppm
0.10ppm
Fe
≤2ppm
0.09ppm
Na
≤2ppm
0.12ppm
K
≤2ppm
0.05ppm
Particle size
≤1mm
1mm
Conclusion
Qualified