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Merck
CN

09215

Pigment Orange 5

analytical standard

Synonym(s):

1-[(2,4-Dinitrophenyl)azo]-2-naphthol, Permanent red 2G

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About This Item

Empirical Formula (Hill Notation):
C16H10N4O5
CAS Number:
3468-63-1
Molecular Weight:
338.27
EC Number:
222-429-4
UNSPSC Code:
85151701
NACRES:
NA.24
PubChem Substance ID:
329748741
MDL number:
MFCD00059524
Colour Index Number:
12075
Beilstein/REAXYS Number:
964718

Key Documents

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InChI key

HBHZKFOUIUMKHV-ISLYRVAYSA-N

InChI

1S/C16H10N4O5/c21-15-8-5-10-3-1-2-4-12(10)16(15)18-17-13-7-6-11(19(22)23)9-14(13)20(24)25/h1-9,21H/b18-17+

SMILES string

Oc1ccc2ccccc2c1\N=N\c3ccc(cc3[N+]([O-])=O)[N+]([O-])=O

grade

analytical standard

assay

≥98.0% (HPLC)

shelf life

limited shelf life, expiry date on the label

technique(s)

HPLC: suitable, gas chromatography (GC): suitable

mp

310-320 °C

application(s)

cleaning products
cosmetics
food and beverages
personal care

format

neat

Quality Level

100

Related Categories

General description

Pigment orange 5 is an azo pigment, which can be produced industrially by a diazotization and coupling sequence in which diazotized dinitroaniline is coupled into β-naphthol.

This substance belongs to the class of azo dyes. Find here a comprehensive listing of all our food colorant reference materials.

Packaging

Bottomless glass bottle. Contents are inside inserted fused cone.

pictograms

Health hazard
GHS08

signalword

Warning

hcodes

H341,H351

pcodes

P281

Hazard Classifications

Carc. 2 - Muta. 2

Storage Class

11 - Combustible Solids

wgk

WGK 3

flash_point_f

Not applicable

flash_point_c

Not applicable

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Certificates of Analysis (COA)

Lot/Batch Number
BCCM9821
BCCK0130

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Pigment Orange 5: crystal structure determination from a non-indexed X-ray powder diagram.
Schmidt U M, et al.
Zeitschrift fur Kristallographie, 222(1), 30-33 (2007)
P Møller et al.
Teratogenesis, carcinogenesis, and mutagenesis, 18(1), 9-16 (1998-05-20)
The induction of DNA damage by commonly used printing ink pigments, C.I. pigment orange 5 (C.I. 12075) and C.I. pigment yellow 12 (C.I. 21090), was investigated in freshly isolated rat hepatocytes with the comet assay. C.I. pigment yellow 12 is
Coatings Materials and Surface Coatings (2006)
A L Scher
Journal - Association of Official Analytical Chemists, 68(3), 474-477 (1985-05-01)
A method is described for the determination of the intermediates in D&C Orange No. 17 by reverse phase liquid chromatography. The pigment is dissolved in boiling dioxane and then precipitated. The filtrate is chromatographed by isocratic elution, which is followed

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