Acid Red 13 is an azo dye.[1] It is produced as a sodium salt. Solid samples appear dark red.

References

  1. ^ Klaus Hunger; Peter Mischke; Wolfgang Rieper; Roderich Raue; Klaus Kunde; Aloys Engel (2005). "Azo Dyes". Ullmann’s Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH. doi:10.1002/14356007.a03_245. ISBN 3527306730..
Allikas: http://en.wikipedia.org/wiki/Acid_Red_13
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