ISO 423:1994 (R2021)
Active , Reaffirmed Standard
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ISO 423:1994 (R2021)

Photography — Processing chemicals — Specifications for hydroquinone

Summary

Establishes criteria for the purity and describes the test methods for identity tests, residue after ignition, heavy metals content, iron content, appearance of solution. Annex A describes preparation of the standard ammonium cerium(IV) hexanitrate solution.

Notes

90.93 : Norme internationale confirmée

Technical characteristics

Publisher International Organization for Standardization (ISO)
Publication Date 04/21/1994
Confirmation Date 06/05/2021
Edition 2
Page Count 6
EAN ---
ISBN ---
Weight (in grams) ---
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