IPC 2013 : D06P 5/17 : Azo dyes.

IPC2013 > D > D06 > D06P > D06P 5/00 > D06P 5/17[2] > Azo dyes.
Notes[t] D01 - D07: TEXTILES OR FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
D SECTION D — TEXTILES; PAPER.
D06 TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR.
D06P DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS, OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM (for mechanical matters, see B41F, B41J, D06B, D06C; printing on surfaces of materials other than textiles B41M; surface treatment of fibres or filaments from glass, minerals, or slags C03C 25/00; mordanting D06M; dyeing paper D21H).
D06P 5/00 Other features in dyeing or printing textiles, or dyeing leather, furs, or solid macromolecular substances in any form.
D06P 5/17 · · Azo dyes.