Naphthalene Blue Black

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
Naphthalene blue black CS
Naphthalene blue black CS
Blauschwartz NSF
20480
Acid black 41
Azo
Acid
Freely
Slightly
610-614
Blue black
C22H13N6O12S3Na3
719

Lendrum used this dye for the demonstration of fibrin in his Masson 44/41 and Obadiah methods. He considered that it demonstrated the oldest fibrin at a stage when it was not distinguishable from collagen by any other staining method.

The dye is not easily available, and not used in any other procedures than Lendrum's Masson 44/41 and Obadiah, both for old fibrin. Naphthol blue black, otherwise known as amido black 10B, CI 20470, is closely related and may be a suitable substitute. Compare the formulae of both dyes.

 

Reference
Edward Gurr, (1971)
Synthetic dyes in biology, medicine and chemistry
Academic Press, London, England.

Colour Index, Ed. 2, v. 3 (1956)
Society of dyers and Colourists, London, England.

 


 

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