Products / pH Indicators

WRIGHT STAIN Print Download

C.A.S. No. 68988-92-1


Solubility 0.1 % (MeOH) Clear solution
Absorption Maximum (MeOH) ?1max 640-645nm
Absorption maximum (MeOH) ?2max 522-525nm
Absorptivity (A1%/1cm in MeOH at ?1max) >1100
Absorptivity (A1%/1cm in MeOH at ?2max) >650
Loss on drying (110°C) <10%

Chemical Name

[7-(dimethylamino)phenothiazin-3-ylidene]-dimethylazanium;2-(2,4,5,7-tetrabromo-3,6-dihydroxyxanthen-10-ium-9-yl)benzoic acid

InChI Key



In Methanol 10mg/10 mL, soluble in Ethanol.

Product Description:

Wright stain is a commonly used hematological stain. This stain is used in blood smear preparations and has also been described in the staining of microorganisms.


It is used primarily to stain peripheral blood smears and bone marrow aspirates which are examined under a light microscope. Romanowsky stains are used to perform differential white blood cell counts and to study red blood cell morphology. Abnormal granulocyte, lymphocyte or monocyte cell counts may be used to facilitate the diagnosis of diseases such as leukemia or bacterial infections.

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