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Black 7984

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Black 7984
Names
IUPAC name Tetrasodium 6-amino-4-hydroxy-3--1-naphthyl]azo]naphthalene-2,7-disulfonate
Other names
  • Food Black 2
  • C.I. 27755
Identifiers
CAS Number
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.016.661 Edit this at Wikidata
EC Number
  • 218-326-9
PubChem CID
CompTox Dashboard (EPA)
InChI
  • InChI=1S/C26H19N5O13S4.4Na/c27-20-12-18-13(9-23(20)47(39,40)41)10-24(48(42,43)44)25(26(18)32)31-30-22-8-7-21(17-6-5-16(11-19(17)22)46(36,37)38)29-28-14-1-3-15(4-2-14)45(33,34)35;;;;/h1-12,30H,27H2,(H,33,34,35)(H,36,37,38)(H,39,40,41)(H,42,43,44);;;;/q;4*+1/p-4/b29-28?,31-25-;;;;Key: XAOPCPOUYMCJFA-PEEPPZCGSA-J
  • acid: InChI=1S/C26H19N5O13S4/c27-20-12-18-13(9-23(20)47(39,40)41)10-24(48(42,43)44)25(26(18)32)31-30-22-8-7-21(17-6-5-16(11-19(17)22)46(36,37)38)29-28-14-1-3-15(4-2-14)45(33,34)35/h1-12,32H,27H2,(H,33,34,35)(H,36,37,38)(H,39,40,41)(H,42,43,44)/b29-28+,31-30+Key: DUUHLAZWLLCPSP-DUJDKOHPSA-N
SMILES
  • S(C(C=C4)=CC=C4/N=N/C(C=C2)=C3C(C=C(S()(=O)=O)C=C3)=C2/N=N/C1=C(S()(=O)=O)C=C(C=C(S()(=O)=O)C(N)=C5)C5=C1O)(=O)=O....
  • acid: Nc1cc2c(O)c(/N=N/c3ccc(/N=N/c4ccc(S(=O)(=O)O)cc4)c4ccc(S(=O)(=O)O)cc34)c(S(=O)(=O)O)cc2cc1S(=O)(=O)O
Properties
Chemical formula C26H15N5Na4O13S4
Molar mass 825.63 g·mol
Except where otherwise noted, data are given for materials in their standard state (at 25 °C , 100 kPa). checkY verify (what is  ?) Infobox references
Chemical compound

Black 7984, Food Black 2, or C.I. 27755, is a brown-to-black synthetic diazo dye. It is often used as the tetrasodium salt.

When used as a food dye, it has E number E152. Its use in food has not been permitted in the United States and in the European Union since 1984. It is also not permitted in Australia and Japan.

Black 7984 is also used in cosmetics.

See also

References

  1. European chemical Substances Information System
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