This standard was last reviewed and confirmed in 2021. Therefore this version remains current.
This International Standard establishes criteria for the purity of photographic-grade 4-(N-ethyl-N-2-methanesulfonyl-aminoethyl)-2-methylphenylenediamine sesquisulfate monohydrate and specifies the test methods to be used to determine the purity.
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|std 1 61|
|std 2 61||Paper|
A standard is reviewed every 5 years
Stage: 90.93 (Confirmed)
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