Sudan Red G

Sudan Red G is a yellowish red lysochrome azo dye. It has the appearance of an odorless reddish-orange powder with melting point 225 °C. It is soluble in fats and used for coloring of fats, oils, and waxes, including the waxes used in turpentine-based polishes. It is also used in polystyrene, cellulose, and synthetic lacquers. It is insoluble in water. It is stable to temperatures of about 100–110 °C. It was formerly used as a food dye, but still appears to be used for this purpose in china. It is used in some temporary tattoos, where it can cause contact dermatitis. It is also used in hair dyes. It is a component of some newer formulas for red smoke signals and smoke-screens, together with Disperse Red 11.

Sudan Red G
Sudan Red G
Names
Preferred IUPAC name
2-[(E)-(2-Methoxyphenyl)diazenyl]naphthalen-2-ol
Identifiers
3D model (JSmol)
ChEMBL
ChemSpider
ECHA InfoCard 100.013.608
EC Number
  • 214-968-9
UNII
  • InChI=1S/C17H14N2O2/c1-21-16-9-5-4-8-14(16)18-19-17-13-7-3-2-6-12(13)10-11-15(17)20/h2-11,20H,1H3/b19-18+ checkY
    Key: ALLOLPOYFRLCCX-VHEBQXMUSA-N checkY
  • InChI=1/C17H14N2O2/c1-21-16-9-5-4-8-14(16)18-19-17-13-7-3-2-6-12(13)10-11-15(17)20/h2-11,20H,1H3/b19-18+
    Key: ALLOLPOYFRLCCX-VHEBQXMUBE
  • COc3ccccc3/N=N/c1c2ccccc2ccc1O
Properties
C17H14N2O2
Molar mass 278.28 g/mol
Melting point 225 °C (437 °F; 498 K)
Hazards
GHS labelling:
GHS08: Health hazard
Danger
H350
P201, P202, P281, P308+P313, P405, P501
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

Other Names

There are various names for Sudan Red G, including Brilliant Fat Scarlet R, C.I. Food Red 16, C.I. Solvent Red I, C.I. 12150, Ceres Red G, Fat Red BG, Fat Red G. Lacquer Red V2G, Oil Pink, Oil Scarlet 389, Oil Vermilion, Oil Red G, Oleal Red G, Plastoresin Red FR, Red GD, Resinol Red G, Silotras Red TG, Solvent Red 1, Sudan R, and amethoxybenzenazo-β-naphthol (MBN).

Toxicity & Safety Issues

According to European Food Safety Authority, Sudan Red G is considered genotoxic and/or carcinogenic.[1]

References
  1. EFSA ::. Opinion of the Scientific Panel on food additives, flavourings, processing aids and materials in contact with food (AFC) to review the toxicology of a number of dyes illegally present in food in the EU
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