• British Pharmacopoeia Volume V
  • Appendices
  • Appendix I A. General Reagents

Sodium Sulfide
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Sodium Sulfide Disodium sulfide nonahydrate, sodium sulphide; Na2S,9H2O = 240.2 (1313-84-4)

Colourless, rapidly yellowing crystals, deliquescent, very soluble in water.

Store in an airtight container.