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Home/Compounds/Dye & Pigment/Pigment Red 146
C33H27ClN4O6
611 g/mol
Dye & Pigment

N-(4-Chloro-2,5-dimethoxyphenyl)-3-hydroxy-4-((2-methoxy-5-((phenylamino)carbonyl)phenyl)azo)naphthalene-2-carboxamide

CAS5280-68-2EC226-103-2
Category
Dye & Pigment
Compound Class
Amide
Primary Use
Pigment for plastics and inks

CI Pigment Red 146 is a synthetic organic pigment used primarily for coloring plastics and printing inks. It is characterized by its azo chemical structure, which includes aromatic rings, amide groups, and a chlorine atom, contributing to its color properties and stability.

Pigment for plastics (typical concentration 2%)Pigment for inksComponent in tattoo inks and permanent makeup (regulated at 0.1% concentration limit in EU)

Content scope: Information here supports chemical identification and industrial supply, research, and manufacturing contexts. It is not a therapeutic claim, medical advice, or drug-use instructions.

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Related Compounds

SimilarStructure SimilarSimilarity 0.82

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Pigment Red 32

ReferenceSame Category

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red pigment for cosmetics and plastics

ReferenceSame Category

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CAS52821-24-6

Fluorescent solvent dye

ReferenceSame Category

2-nitro-p-phenylenediamine

CAS5307-14-2

hair dye intermediate

ReferenceSame Category

N,N'-diphenylbenzidine

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dye intermediate

Customs Tariff Classification

The international HS code for N-(4-Chloro-2,5-dimethoxyphenyl)-3-hydroxy-4-((2-methoxy-5-((phenylamino)carbonyl)phenyl)azo)naphthalene-2-carboxamide (CAS 5280-68-2) is 3204.17.

HS code (international, 6-digit)

3204.17

EU CN code (8-digit)

3204 17 00

Classification per the EU customs inventory ECICS (2026-07 snapshot, HS 2022). National tariff lines and product form can affect the final classification.

Identifiers
IUPAC Name

N-(4-chloro-2,5-dimethoxyphenyl)-3-hydroxy-4-[[2-methoxy-5-(phenylcarbamoyl)phenyl]diazenyl]naphthalene-2-carboxamide

InChIKey

HEKSHDRHZRCZBN-UHFFFAOYSA-N

SMILES

COC1=C(C=C(C=C1)C(=O)NC2=CC=CC=C2)N=NC3=C(C(=CC4=CC=CC=C43)C(=O)NC5=CC(=C(C=C5OC)Cl)OC)O

Synonyms (8)

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