2-Aminobenzenesulfonic acid

About 2-Aminobenzenesulfonic acid

2-Aminobenzenesulfonic acid is an impurity of Mesalazine carrying the CAS registry number 88-21-1. With the molecular formula C6H7NO3S, it has a molar mass of 173.19 g/mol. It is also known as Orthanilic acid or o-Aminobenzenesulfonic acid.

The product is provided as a solid. Keep the vial tightly closed, protected from light and humidity, at the temperature stated on the Certificate of Analysis. Under GHS it is labelled “Danger”, so handle it with suitable PPE and consult the SDS.

As a characterised impurity of Mesalazine, it is used for analytical method development, method validation (AMV) and routine quality-control testing, and it supports ANDA and DMF regulatory filings. Buyers come mainly from pharmaceutical manufacturing and academic and industrial research.

We offer 2-Aminobenzenesulfonic acid in 10 mg, 25 mg, 50 mg and 100 mg packs with a batch-specific COA, and ship to customers worldwide.

Typical applications

Analytical method development
Method validation (AMV)
QC release testing
ANDA / DMF filings

Industries

Related to Mesalazine

View every impurity, metabolite and intermediate we list for Mesalazine.

Mesalazine impurities

Specifications & identifiers

Chemical identifiers
Product name	2-Aminobenzenesulfonic acid
Catalogue No.	VQ-031794
CAS Number	88-21-1
IUPAC name	2-aminobenzenesulfonic acid
Molecular formula	C₆H₇NO₃S
Molecular weight	173.19 g/mol
Exact mass	173.0147
Grade	Reference Standard
HSN code	38229090
InChIKey	ZMCHBSMFKQYNKA-UHFFFAOYSA-N
SMILES	C1=CC=C(C(=C1)N)S(=O)(=O)O
PubChem CID	6926

Physical properties
Physical form	Solid
LogP (XLogP3)	0.4
H-bond donors / acceptors	2 / 4
TPSA	88.8 Å²
Synonyms	Orthanilic acid, o-Aminobenzenesulfonic acid, o-Sulfanilic acid, Aniline-o-sulfonic acid, 2-Sulfanilic acid, Aniline-o-sulphonic acid, 1-Aminobenzene-2-sulfonic acid, o-Aminophenylsulfonic acid, Benzenesulfonic acid, o-amino-, ortho-sulfanilic acid, Aniline-2-sulfonic acid

Safety & hazard information (GHS)

Corrosive

Harmful / irritant

Signal word: Danger

Hazard statements

H314Causes severe skin burns and eye damage
H319Causes serious eye irritation

Precautionary statements: P260, P264, P264 + P265, P280, P301 + P330 + P331, P302 + P361 + P354, P304 + P340, P305 + P351 + P338, P305 + P354 + P338, P316, P321, P337 + P317, P363, P405, P501

Classification is indicative (aggregated GHS notifications) and may vary by grade and concentration. Always refer to the SDS supplied with your lot.

Documents

Safety Data Sheet (SDS)16-section GHS · on request Certificate of AnalysisTypical / batch COA · on request Specification sheetTDS / MOA · on request

Frequently asked questions

What is the CAS number of 2-Aminobenzenesulfonic acid?

The CAS Registry Number of 2-Aminobenzenesulfonic acid is 88-21-1. It is also known as Orthanilic acid, o-Aminobenzenesulfonic acid, o-Sulfanilic acid.

What is the molecular formula and molecular weight of 2-Aminobenzenesulfonic acid?

2-Aminobenzenesulfonic acid has the molecular formula C6H7NO3S and a molecular weight of 173.19 g/mol. Its IUPAC name is 2-aminobenzenesulfonic acid.

What is 2-Aminobenzenesulfonic acid used for?

2-Aminobenzenesulfonic acid is supplied as a characterised reference material related to Mesalazine. It is used for analytical method development and validation (AMV), impurity profiling, stability studies and quality control, and in ANDA/DMF regulatory filings.

Which grade and pack sizes of 2-Aminobenzenesulfonic acid can I order?

We supply 2-Aminobenzenesulfonic acid in Reference Standard grade, in 10 mg, 25 mg, 50 mg, 100 mg packs. Larger bulk quantities and custom packing are quoted on request.

Do you provide a COA and SDS with 2-Aminobenzenesulfonic acid?

Yes. Every lot of 2-Aminobenzenesulfonic acid is shipped with a batch-specific Certificate of Analysis, and a 16-section GHS Safety Data Sheet is provided with the quotation and the shipment.

Can 2-Aminobenzenesulfonic acid be shipped internationally?

Yes. 2-Aminobenzenesulfonic acid is classified as hazardous, so it is packed in UN-approved packaging and shipped as dangerous goods under IATA/IMDG rules. We export worldwide on EXW, FOB, CIF and DAP terms.