NILE CHEMICALS

   SELENIUM  POWDER  BLACK 

SPECIFICATION

Se       A.W.      78.96       
Minimum assay 99.5%
Melting point 220 - 222OC
Maximum Limits of Impurities :  
Nitric acid insoluble matter 0.01%
Loss on drying 0.05%
Non - volatile matter 0.05%
Nitrogen compounds ( N ) 0.02%
Copper ( Cu ) 0.01%
Iron ( Fe ) 0.006%
Sulphur ( S ) 0.0015%
Tellurium ( Te ) 0.005%
   

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