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2-Amino-5-methylbenzenesulfonic acid (4b Acid)

2-Amino-5-methylbenzenesulfonic acid (4b Acid)

CAS Number: 88-44-8

Molecular Formula: C7H9NO3S

About 2-Amino-5-methylbenzenesulfonic acid (4b Acid)

2-Amino-5-methylbenzenesulfonic acid (CAS No: 88-44-8), commonly known as 4B Acid, serves as a cornerstone intermediate in the global organic pigment industry, specifically for the synthesis of high-performance azo pigments like C.I. Pigment Red 57:1 (Lithol Rubine BK) used extensively in solvent-based packaging inks a...

2-Amino-5-methylbenzenesulfonic acid (4b Acid) Specifications

CAS Number
88-44-8
Molecular Formula
C7H9NO3S
IUPAC Name
2-amino-5-methylbenzenesulfonic acid
Canonical SMILES
CC1=CC(=C(C=C1)N)S(=O)(=O)O
InChI Key
LTPSRQRIPCVMKQ-UHFFFAOYSA-N
HSN No
29214300
Precautionary Statement Codes
P260, P264, P280, P301+P330+P331, P302+P361+P354, P304+P340, P305+P354+P338, P316, P321, P363, P405, and P501
Hazard Classes and Categories
Skin Corr. 1B (26.2%)

Dye Intermediate

A versatile aromatic organic intermediate mainly used in the preparation of acid dyes, reactive dyes, and organic pigments such as Pigment Red 6B, Litholbromine Red BK, and Pigment Brilliant Yellow Red BL

Organic Pigment Precursor

A critical building block used for the production of pigment C.I. 57:1 (Pigment Brilliant Red 6B) and other specialized pigments used in coloring inks, plastics, rubber, and daily chemical products

Chemical Synthesis Intermediate

A functionalized benzene derivative utilized in the synthesis of pharmaceuticals, pesticides, and other fine chemical products

Laboratory Reagent

A high-purity chemical used in academic and industrial research for chemical analysis and the development of complex organic molecules.

2-Amino-5-methylbenzenesulfonic acid (4b Acid) FAQs

Minimum Order Quantity

25 kg (pilot) · 1 MT (commercial)

Lead Time

3 – 5 weeks ex-works

Incoterms

FOB · CIF

Packaging

20 L pails, 200 L HDPE drums, 1000 L IBC

Regional Availability

India · EU · Middle East · Southeast Asia

Documentation

SDS · COA · TDS available on request

Compliance & Quality

REACH registered*

GHS/SDS available

ISO 9001:2015 site*

RoHS compliant*

Global sourcing network

Consistent quality & reliability

End-to-end technical support

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