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Supelco

Pigment Red 53

analytical standard

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Synonym(s):
5-Chloro-2-[(2-hydroxy-1-naphthalenyl)azo]-4-methylbenzenesulfonic acid monosodium salt, Lake Red C
Empirical Formula (Hill Notation):
C17H12ClN2NaO4S
CAS Number:
2092-56-0
Molecular Weight:
398.80
Colour Index Number:
15585
EC Number:
218-248-5
MDL number:
MFCD00059530
PubChem Substance ID:
329760449
NACRES:
NA.24

grade

analytical standard

Quality Level

100

Assay

≥98.0% (HPLC)

shelf life

limited shelf life, expiry date on the label

technique(s)

HPLC: suitable
gas chromatography (GC): suitable

application(s)

cleaning products
cosmetics
food and beverages
personal care

format

neat

SMILES string

OC1=CC=C2C(C=CC=C2)=C1/N=N/C3=CC(C)=C(Cl)C=C3S(=O)([O-])=O.[Na+]

InChI

1S/C17H13ClN2O4S.Na/c1-10-8-14(16(9-13(10)18)25(22,23)24)19-20-17-12-5-3-2-4-11(12)6-7-15(17)21;/h2-9,21H,1H3,(H,22,23,24);/q;+1/p-1/b20-19+;

InChI key

LLELVHKMCSBMCX-RZLHGTIFSA-M

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Application

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Storage Class Code

11 - Combustible Solids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

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C Westmoreland et al.
Mutation research, 281(3), 163-167 (1992-03-01)
The azo-compound, D and C Red No. 9 was assayed for genotoxicity in vivo using the rat micronucleus test and the rat ex vivo liver UDS assay. Uniformly negative results were obtained in both assays, even though large oral doses
D G Goodman et al.
Journal of the National Cancer Institute, 73(1), 265-273 (1984-07-01)
In six carcinogenicity bioassays, male and female F344 rats were fed diets containing aniline hydrochloride (CAS: 142-04-1; hydrochloride benzenamide), p-chloroaniline (CAS: 106-47-8), azobenzene (CAS: 103-33-3), o-toluidine hydrochloride (CAS: 636-21-5), dapsone (CAS: 80-08-0; 4,4'-sulfonyldianiline), or D & C red No. 9
M A Weinberger et al.
Journal of the National Cancer Institute, 75(4), 681-690 (1985-10-01)
A histopathologic review of F344 rat spleens from the National Toxicology Program-National Cancer Institute bioassays of barium salt of 5-chloro-2-(2-hydroxy-1-naphthalenyl)-azo-4-methylbenzenesulfonic acid [(D & C Red No. 9) CAS: 516-00-21] and aniline HCI (CAS: 142-04-1) was conducted to assess splenotoxic changes
A L Scher et al.
Journal - Association of Official Analytical Chemists, 71(5), 1007-1011 (1988-09-01)
A method is described for the determination of the intermediates in D&C Red No. 8 by reverse-phase liquid chromatography (LC). The pigment is dissolved in boiling 95% ethanol-water (1 + 1) and then precipitated. The filtrate is chromatographed by gradient
D&C Red No. 9 (CI Pigment Red 53:1).
IARC monographs on the evaluation of carcinogenic risks to humans, 57, 203-212 (1993-01-01)
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