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Appearance dark red-orange powder; Assay (dye
content) 97%; Absorption max 0.661; Biological Stain Commission certification
LO-19; Boiling point -°C; Density 0.80; Flash point 14°C; Identification (IR)
conforms to structure; Loss on drying 5.32%; Melting point 141°C; refractive
index -; Solubility in ethanol (3mg/ml) and water (80mg/ml); Suitability
Certified for use in collagen stain for connective tissue, major component in
the Papanicolaou stain, which is used in cervical cytology, used to stain
cells secreting growth hormone in the anterior pituitary and stain the mature
bone orange, also been incorporated in the following: Mallory's connective
tissue stain, Flemming's triple stain on paraffin sections of onion root,
Kreyberg's method for keratin and mucus and prostatic carcinoma cells, as a
counterstain following Heidenhain's iron hematoxylin on paraffin sections and
in the Wilson-Ezrin method for pituitary acidophils;
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