Sodii Hyposulphis. Sodium Hyposulphite. Na2S2O3 + 5H2O = 247.64. Synonym. - Sodium Thiosulphate.

Source

From Sodium Bisulphate in solution with Metallic Zinc. 3Na Hso3 + Zn =Na2S2O3 + Na2S2O3 + ZnO, + H2O. Or pass Sulphurous Anhydride into a solution of Soda (or Sodium Carbonate) with Sulphur. So2 + 2Na(OH) + S = Na2S2O3 + H20.

Characters

Colorless, transparent, monoclinic prisms, odorless and having a cooling, afterwards bitter taste. Solubility. - In 0.65 part of water; insoluble in Alcohol.

Dose, 5 to 20 gr.; .30 to 1.20 gm.

Action and Therapeutics of Sodium Sulphite, Bisulphite and Hyposulphite

Sodium sulphite solutions (1 in 8) may be used externally as mild antiparasitics. This body is, in the stomach, decomposed by the acids there and gives off sulphurous anhydride. It may, therefore, be given to arrest fermentation. If any remains un-decomposed, it is absorbed as a sulphite. No other action is known. They are very rarely given in medicine, but in sufficient doses might produce the effects of sodium sulphate.

11. Sodii Bromidum, see Bromine. 12. Sodii Iodidum, see Iodine.

13. Sodii Hypophosphis, see Phosphorus.

14. Sodii Arsenas, see Arsenic.

15. Sodii Sulphocarbolas, see Acidum Carbolicum.