Special Provision: IB

Sodium hydrosulfide, with less than 25 percent water of crystallization

Sodium hydrosulfide with not less than 25 percent water of crystallization

Sodium hydroxide, solid

Sodium fluorosilicate

Sodium hydrogendifluoride

Sodium fluoroacetate

Sodium dithionite or Sodium hydrosulfite

Sodium fluoride solution

Sodium fluoride, solid

Sodium cyanide solution