Selenium Derivatives

Selenium Dioxide
CAS No. 7446 - 08 - 4
Mol. Wt. 110.96 g/mol Mol Formula : SeO2
Appearance Colorless or White Hygroscopic Powder
Identity Se - Passes Test
Test Solution(10 %W/V),Water Clear and Colorless Solution
PARAMETERS
Assay NLT 99.00%
Residue on Ignition NLT 0.1%
MAXIMUN LIMITS OF IMPURITIES
Heavy Metals(as Pb) 0.01%
Iron (Fe) 0.005%
Sodium Selenate
CAS No. 13410 - 01 - 0
Mol. Wt. 188.94 g/mol Mol Formula : Na2SeO4
Appearance White/Off White Crystalline Powder
Identity Se - Passes Test
Test Solution(10 %W/V),Water Clear and Colorless Solution
PARAMETERS
Assay 98.00 - 105.00%
Selenium Content NLT 40.94%
MAXIMUN LIMITS OF IMPURITIES
Loss on Drying 0.5%
Selenite Content 1.00%
Sodium Selenite
CAS No. 10102 - 18 - 8
Mol. Wt. 172.94 g/mol Mol Formula : Na2SeO3
Appearance White/Off White Crystalline Powder
Identity Se - Passes Test
Test Solution(2 %W/V),Water Clear and Colorless Solution
PARAMETERS
Assay 97.50 - 100.50%
Selenium Content 44 - 46%
MAXIMUN LIMITS OF IMPURITIES
Loss on Drying 1%
Chloride(Cl) 0.1%
Sulfate(SO4) 0.2%
Iron(Fe) 0.02%
Selenium Sulphide
CAS No. 7488 - 55 - 4  
Mol. Wt. 143.08 g/mol Mol Formula : SeS2
Appearance Reddish Brown to Bright Orange Powder
Identity Se - Passes Test
S - Passes Test
PARAMETERS
Assay 52.00 - 55.50% of Se
Residue on Ignition Content 0.2%
Soluble Selenium Compound NMT 5 ppm
Free Selenium Nil
Particle Size 99% PASSING THROUGH 10 M
BULK DENISITY(Fe) 0.7 - 1.30 g/ml