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| ImageSize = 250px
| ImageSize = 250px
| IUPACName = Tetrasodium 6-amino-4-hydroxy-3-<nowiki>[[</nowiki>7-sulfonato-4-[(4-sulfonatophenyl)azo]-1-naphthyl]azo]naphthalene-2,7-disulfonate
| IUPACName = Tetrasodium 6-amino-4-hydroxy-3-<nowiki>[[</nowiki>7-sulfonato-4-[(4-sulfonatophenyl)azo]-1-naphthyl]azo]naphthalene-2,7-disulfonate
| OtherNames = Food Black 2<br>C.I. 27755
| OtherNames = {{Unbulleted list
| Food Black 2
| C.I. 27755
}}
|Section1={{Chembox Identifiers
|Section1={{Chembox Identifiers
| CASNo_Ref = {{cascite|correct|??}}
| CASNo_Ref = {{cascite|correct|??}}
| CASNo = 2118-39-0
| CASNo = 2118-39-0
| CASNo1 = 25738-38-9
| index1_label = acid
| ChemSpiderID1 = 14306907
| EINECS = 218-326-9
| EINECS = 218-326-9
| PubChem = 14047491
| PubChem = 14047491
| StdInChI=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-;;;;
| StdInChI=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-;;;;
| StdInChIKey = XAOPCPOUYMCJFA-PEEPPZCGSA-J
| StdInChIKey = XAOPCPOUYMCJFA-PEEPPZCGSA-J
| SMILES = [O-]S(C(C=C4)=CC=C4/N=N/C(C=C2)=C3C(C=C(S([O-])(=O)=O)C=C3)=C2/N=N/C1=C(S([O-])(=O)=O)C=C(C=C(S([O-])(=O)=O)C(N)=C5)C5=C1O)(=O)=O.[Na+].[Na+].[Na+].[Na+]}}
| SMILES = [O-]S(C(C=C4)=CC=C4/N=N/C(C=C2)=C3C(C=C(S([O-])(=O)=O)C=C3)=C2/N=N/C1=C(S([O-])(=O)=O)C=C(C=C(S([O-])(=O)=O)C(N)=C5)C5=C1O)(=O)=O.[Na+].[Na+].[Na+].[Na+]
| SMILES1 = 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
| InChI1=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+
| InChIKey1=DUUHLAZWLLCPSP-DUJDKOHPSA-N
}}
|Section2={{Chembox Properties
|Section2={{Chembox Properties
| C=26 | H=15 | N=5 | Na=4 | O=13 | S=4
| C=26 | H=15 | N=5 | Na=4 | O=13 | S=4
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'''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 (chemistry)|salt]].
'''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 (chemistry)|salt]].


When used as a [[food dye]], it has [[E number]] E152. Its use in food is discontinued in USA and EU since 1984.<!-- http://devlamindepan.nl/e-nummers/100-199/bw152.htm --> It is also not permitted in [[Australia]] and [[Japan]].
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.{{cn|date=September 2018}} It is also not permitted in [[Australia]] and [[Japan]].{{cn|date=September 2018}}


Black 7984 is also used in [[cosmetics]].
Black 7984 is also used in [[cosmetics]].

Black 7984 may cause [[allergic]] or intolerance reactions, particularly amongst those with an [[aspirin]] intolerance.{{Fact|date=September 2008}} It is a [[histamine]] liberator, and may worsen the symptoms of [[asthma]].{{Fact|date=September 2008}} It is one of the colorants that the [[Hyperactive Children's Support Group]] recommends be eliminated from the diet of children.{{Fact|date=September 2008}}


==See also==
==See also==
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[[Category:Azo dyes]]
[[Category:Azo dyes]]
[[Category:Food colorings]]
[[Category:Food colorings]]
[[Category:Acid dyes]]

Latest revision as of 04:35, 22 November 2024

Black 7984[1]
Names
IUPAC name
Tetrasodium 6-amino-4-hydroxy-3-[[7-sulfonato-4-[(4-sulfonatophenyl)azo]-1-naphthyl]azo]naphthalene-2,7-disulfonate
Other names
  • Food Black 2
  • C.I. 27755
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.016.661 Edit this at Wikidata
EC Number
  • 218-326-9
  • 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
  • [O-]S(C(C=C4)=CC=C4/N=N/C(C=C2)=C3C(C=C(S([O-])(=O)=O)C=C3)=C2/N=N/C1=C(S([O-])(=O)=O)C=C(C=C(S([O-])(=O)=O)C(N)=C5)C5=C1O)(=O)=O.[Na+].[Na+].[Na+].[Na+]
  • 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
C26H15N5Na4O13S4
Molar mass 825.63 g·mol−1
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
checkY verify (what is checkY☒N ?)

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.[citation needed] It is also not permitted in Australia and Japan.[citation needed]

Black 7984 is also used in cosmetics.

See also

[edit]

References

[edit]
  1. ^ European chemical Substances Information System[permanent dead link‍]
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