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Sodium Thiosulfate
Na2S2O3·5H2O 248.18
 Na2S2O3 158.11
 Thiosulfuric acid, disodium salt, pentahydrate;
 Disodium thiosulfate pentahydrate
 [10102-17-7] Anhydrous [7772-98-7]

DEFINITION

Sodium Thiosulfate contains NLT 99.0% and NMT 100.5% of sodium thiosulfate (Na2S2O3), calculated on the anhydrous basis.

USP REFERENCE STANDARDS FOR PURCHASE

USP Sodium Thiosulfate RS
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