应用
Sodium thiosulfate pentahydrate is used as an analytical reagent in laboratories. It is used in photographic processing and in gold extraction. Its alkylated derivatives, S-alkylthiosulfonates, are known as Bunte salts. It is involved in the preparation of thioglycolic acid. Furthermore, it is used to dechlorinate tap water, for removing free bromine from solutions and to check the pH of bleach solutions with liquid indicators. Other uses include tanning of leather; as an active component in hand warmers and chemical heating pads and as an anionic surfactant to aid in the dispersion of pharmaceutical preparations.

Grade Specifications
Maximum level of impurities: Insoluble matter 0.005%, pH of a 5% solution 6.0-8.4 at 25?, Nitrogen compounds (as N) 0.002%, Sulfate and sulfite (as SO₄) 0.1%, Sulfide P.T. (limit about 1ppm)

备注
Incompatible with sodium nitrate, acids, strong oxidizing agents, iodides, silver salts, mercury salts and lead.

基本信息

MDL
MFCD00149186

EINECS
231-867-5

分子式
Na₂O₃S₂?5H₂O

分子量
248.17 (158.10anhy)

熔点
48°

沸点
100° -5H{2}O

密度
1.69

灵敏度
Ambient temperatures.

形态
Crystalline

溶解性
Soluble in water and ammonia. Insoluble in alcohol and organic solvents.

Merck
14,8694

安全信息

RTECS
WE6660000

TSCA
是