Sudan III

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Sudan III
IUPAC name	1-((4-(phenyldiazenyl)phenyl)diazenyl)naphthalen-2-ol
Identifiers
CAS number	[85-83-9]
SMILES	Oc1c(/N=N/c2ccc(/N=N/c3ccccc3)cc2)c4ccccc4cc1
Properties
Molecular formula	C22H16N4O
Molar mass	352.39 g/mol
Density	? g/cm3
Melting point	199 °C
Boiling point	°C
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Infobox disclaimer and references

Sudan III is a lysochrome (fat-soluble dye) diazo dye used for staining of triglycerides in frozen sections, and some protein bound lipids and lipoproteins on paraffin sections. It has the appearance of reddish brown crystals and a maximum absorption at 507(304) nm.

Sudan III is a dye used for Sudan staining. Similar dyes include Oil Red O, Sudan IV, and Sudan Black B.

Its risk and safety phrases are S22-S24/S25.

Its other names are Sudan Red BK, Fat Ponceau G, Cerasin Red, C.I. 26100, Solvent Red 23, Sudan Red, Sudan Red III, Sudan V, Sudan Red B, Sudan G, Scarlet B, and Tony Red.

In industry, it is used to color nonpolar substances like oils, fats, waxes, greases, various hydrocarbon products, and acrylic emulsions.

[edit] References

• R. D. Lillie.

Conn's Biological Stains

Williams & Wilkins, Baltimore, MD., U.S.A.

• Aldrich chemical catalogue, 1992

Aldrich Chemical Company, Milwaukee, WI, USA.

• Susan Budavari, Editor, (1996)

The Merck Index, Ed. 12

Merck & Co., Inc., Whitehouse Station, NJ, USA

• Edward Gurr, (1971)

Synthetic dyes in biology, medicine and chemistry

Academic Press, London, England.

[edit] External links

• Stains File entry