Water blue

Water blue

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Identifiers
CAS Number	28631-66-5 Y
Jmol 3D model	Interactive image
SMILES [H+].c1ccc(c(c1)Nc2ccc(cc2)C(=C3C=CC(=Nc4ccccc4S(=O)(=O)[O-])C=C3)c5cccc(c5CN)S(=O)(=O)[O-])S(=O)(=O)[O-].[Na+].[Na+]
Properties
Chemical formula	C32H25N3O9S3Na2
Molar mass	737.72374 g/mol
Vapor pressure	{{{value}}}
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

Water blue, also known as aniline blue, Acid blue 22, Soluble Blue 3M, Marine Blue V, or C.I. 42755, is a chemical compound used as a stain in histology. Water blue stains collagen blue in tissue sections. It is soluble in water and slightly soluble in ethanol.

Water blue is also available in mixture with methyl blue, under name Aniline Blue WS, Aniline blue, China blue, or Soluble blue.

It can be used in the Mallory's trichrome stain of connective tissue and Gömöri trichrome stain of muscle tissue. It is used in differential staining.