This standard was last reviewed and confirmed in 2021. Therefore this version remains current.
Cancels and replaces the first edition (1976). Establishes criteria for the purity of photographic-grade ammonium thiosulfate solution and specifies the tests to be used to determine the purity.
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|std 1 40|
|std 2 40||Paper|
A standard is reviewed every 5 years
Stage: 90.93 (Confirmed)
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