Selenium Dioxide, Extra Pure, 500 g, CAS# 7446-08-4

Selenium powder, GR, 500 g, CAS# 7782-49-2

Silicagel 60 230~400 mesh, Column Chromatography, 1 kg, CAS# 7631-86-9

Silicagel 60 230~400 mesh, Column Chromatography, 25 kg, CAS# 7631-86-9

Silicagel 60 70~230 mesh, Column Chromatography, 1 kg, CAS# 7631-86-9

Silicagel 60 70~230 mesh, Column Chromatography, 25 kg, CAS# 7631-86-9

Silicagel Medium Granular (Blue), CP, 500 g, CAS# 7631-86-9

Silicon Dioxide, Extra Pure, 15 kg, CAS# 7631-86-9

Silicon Dioxide, Extra Pure, 300 g, CAS# 7631-86-9

Silicone High Vacuum Grease, Extra Pure, 1 kg, CAS# 63148-62-9

Silver Chloride, Extra Pure, 25 g, CAS# 7783-90-6

Silver Chloride, Extra Pure, 500 g, CAS# 7783-90-6

Silver Diethyldithiocarbamate, GR/AR, 25 g, CAS# 1470-61-7

Silver Nitrate, Extra Pure, 25 g, CAS# 7761-88-8

Silver Nitrate, Extra Pure, 500 g, CAS# 7761-88-8

Silver Sulfate, Extra Pure, 25 g, CAS# 10294-26-5

Silver Sulfate, Extra Pure, 500 g, CAS# 10294-26-5

Soda Lime, GR, 500 g, CAS# 8006-28-8

Sodium Acetate anhydrous, Extra Pure, 1 kg, CAS# 127-09-3

Sodium Acetate anhydrous, Extra Pure, 500 g, CAS# 127-09-3

Sodium Acetate trihydrate, Extra Pure, 1 kg, CAS# 6131-90-4

Sodium Acetate trihydrate, Extra Pure, 500 g, CAS# 6131-90-4

Sodium Alginate, Extra Pure, 25 kg, CAS# 9005-38-3

Sodium Alginate, Extra Pure, 500 g, CAS# 9005-38-3

Sodium Arsenite, Extra Pure/AR, 25 g, CAS# 7784-46-5

Sodium Azide, Extra Pure, 25 g, CAS# 26628-22-8

Sodium Azide, Extra Pure, 500 g, CAS# 26628-22-8

Sodium Benzoate, Extra Pure, 500 g, CAS# 532-32-1

Sodium Bicarbonate, Extra Pure, 1 kg, CAS# 144-55-8

Sodium Bicarbonate, Extra Pure, 25 kg, CAS# 144-55-8

Sodium Bicarbonate, Extra Pure, 500 g, CAS# 144-55-8

Sodium Bismuthate, Extra Pure/AR, 25 g, CAS# 12232-99-4

Sodium Bismuthate, Extra Pure/AR, 500 g, CAS# 12232-99-4

Sodium Bisulfate anhydrous, Extra Pure, 25 kg, CAS# 7681-38-1

Sodium Bisulfate anhydrous, Extra Pure, 500 g, CAS# 7681-38-1

Sodium Bisulfate monohydrate, Extra Pure, 25 kg, CAS# 10034-88-5

Sodium Bisulfate monohydrate, Extra Pure, 500 g, CAS# 10034-88-5

Sodium Bisulfite, Extra Pure, 1 kg, CAS# 7631-90-5

Sodium Bisulfite, Extra Pure, 25 kg, CAS# 7631-90-5

Sodium Bisulfite, Extra Pure, 500 g, CAS# 7631-90-5

Sodium Borohydride, CP, 25 g, CAS# 16940-66-2

Sodium Borohydride, CP, 500 g, CAS# 16940-66-2

Sodium Borohydride, Extra Pure, 25 g, CAS# 16940-66-2

Sodium Bromate, Extra Pure, 25 kg, CAS# 7789-38-0