GSP Chemical Industries


Business Type Manufacturer, Supplier
C.A.S. No. 531-55-5
CI NO. 52010
M.F. C15H16CIN3S
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Preferred Buyer From

Location Anywhere in India

Product Details

Dye Content (by Spectrophotometry)
Solubility 0.1% (Dist. Water)
Clear solution
Absorption Maximum (Dist. Water) ?max
Absorptivity (A1%/1cm,in water at ?max on dried substance)
Loss On Drying (110°C)
Suitability for microscopy
Passes test

Chemical Name

3-(Dimethylamino)-7-(methylamino)phenothiazin-5-ium chloride


InChI Key




Soluble in water; slightly soluble in ethanol, methanol.


Azure B is a cationic dye. It is part of the Romanowsky stain, which is used for the staining of blood films. It is also used for the localization of nucleic acids.Azure B has been used for the staining of chromosomes. Azure B has been used in M'Fadyean stain to visualize Bacillus anthracis capsule.



Azure B is used for differentiating cellular RNA (purplish) and DNA (blue-green) in plant tissues. Useful as a stain for Negri Bodies. Can be used in the Romanowsky-type stains for blood and blood protozoa. Purified azure B, on the other hand, gave reproducibly stained, deposit-free preparations. Reticulocyte counts obtained from azure B preparations correlated almost exactly with those determined using new methylene blue. Purified azure B is therefore recommended as a convenient reticulocyte stain for routine use.

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