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ISO 423:1994
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Photography -- Processing chemicals -- Specifications for hydroquinone

This standard was last reviewed* in 2011.

*ISO standards are reviewed every five years.

Abstract

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.

 

  • Edition: 2 (Monolingual) ICS: 37.040.30
    Status: Published Stage: 90.93 (2011-09-30)
    TC/SC: ISO/TC 42 Number of Pages: 6
  • Revises: ISO 423:1976

  • No corrigenda or amendments available

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