Hoffman's Violet

Property Data
Common name
Suggested name
Other names
C.I. number
C.I. name
Class
Ionisation
Solubility aqueous
Solubility ethanol
Absorption maximum
Colour
Empirical formula
Formula weight
Dahlia
Hoffman's violet
Primula
42530

Triarylmethane
Basic
Soluble


Violet blue
C26H32N3Cl
422

Hoffman's violet may be as the formula above, or a structure very closely related, as it appears that the name is loosely applied. Some samples labeled as Hoffman's violet or dahlia may be methyl violets, or mixtures of these with pararosanilin. For that reason, the colour varies from red-violet to blue-violet. It has been recommended as a metachromatic dye, particularly for amyloid. The substitutes supplied under this name are usually as effective for this.

Do not confuse this dye with primuline, a yellow dye related to thioflavine T

 

Reference
R. D. Lillie.
Conn's Biological Stains
Williams & Wilkins, Baltimore, MD., U.S.A.

 


 

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