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Orange G is an azo dye used primarily as a histological stain. It is a pail dye that is used for faint background staining and is very soluble in water with decreased solubility in alcohol.
O 1305 (OTTO) Orange G, for microscopy Cas no 1936-15-8 - used primarily as a histological stain. O 1305 (OTTO) Orange G, for microscopy Cas no 1936-15-8 - used to stain biological materials, paper, and wood and to dye leather, wool, and silk.