Metanilic acid

About Metanilic acid

Metanilic acid is an organosulfur compound carrying the CAS registry number 121-47-1 with a typical assay of 97%. Formula C6H7NO3S, molecular weight 173.19 g/mol. The IUPAC name is 3-aminobenzenesulfonic acid. Alternative names: m-Aminobenzenesulfonic acid and m-Sulfanilic acid.

The product is provided as a solid. Literature values give a boiling point of above 300 °C. Solubility: ethanol: very slightly soluble. Store sealed in a dry, well-ventilated location away from incompatible materials. It carries the GHS signal word “Warning” with 3 hazard statements. Review the Safety Data Sheet before use.

Typical applications include organic synthesis and API synthesis. Buyers come mainly from pharmaceutical manufacturing and academic and industrial research.

We offer Metanilic acid in 250 g, 500 g, 5 x 1 kg and 4 x 25 kg packs with a batch-specific COA, and ship to customers worldwide.

Typical applications

Organic synthesis
API synthesis

Industries

Specifications & identifiers

Chemical identifiers
Product name	Metanilic acid
Catalogue No.	VQ-010892
CAS Number	121-47-1
IUPAC name	3-aminobenzenesulfonic acid
Molecular formula	C₆H₇NO₃S
Molecular weight	173.19 g/mol
Exact mass	173.0147
Purity / assay	97%
HSN code	29214290
InChIKey	ZAJAQTYSTDTMCU-UHFFFAOYSA-N
SMILES	C1=CC(=CC(=C1)S(=O)(=O)O)N
PubChem CID	8474

Physical properties
Physical form	Solid
Appearance	Solid
Boiling point	>300 °C
Solubility	Ethanol: very slightly soluble(lit.)
LogP (XLogP3)	-0.2
H-bond donors / acceptors	2 / 4
TPSA	88.8 Å²
Synonyms	m-Aminobenzenesulfonic acid, m-Sulfanilic acid, Benzenesulfonic acid, 3-amino-, m-Anilinesulfonic acid, 1-Aminobenzene-3-sulfonic acid, Kyselina metanilova, Aniline-m-sulfonic acid, 3-Aminobenzenesulphonic acid, Aminobenzenesulfonic acid, 3-aminobenzene-1-sulfonic acid, 3-Sulfoaniline, Kyselina anilin-3-sulfonova

Safety & hazard information (GHS)

Harmful / irritant

Signal word: Warning

Hazard statements

H302Harmful if swallowed
H312Harmful in contact with skin
H332Harmful if inhaled

Precautionary statements: P261, P264, P270, P271, P280, P301 + P317, P302 + P352, P304 + P340, P317, P321, P330, P362 + P364, 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 Metanilic acid?

The CAS Registry Number of Metanilic acid is 121-47-1. It is also known as m-Aminobenzenesulfonic acid, m-Sulfanilic acid, Benzenesulfonic acid, 3-amino-.

What is the molecular formula and molecular weight of Metanilic acid?

Metanilic acid has the molecular formula C6H7NO3S and a molecular weight of 173.19 g/mol. Its IUPAC name is 3-aminobenzenesulfonic acid.

Which grade and pack sizes of Metanilic acid can I order?

We supply Metanilic acid in (97%) grade, in 250 g, 500 g, 5 x 1 kg, 4 x 25 kg packs. Larger bulk quantities and custom packing are quoted on request.

Do you provide a COA and SDS with Metanilic acid?

Yes. Every lot of Metanilic 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 Metanilic acid be shipped internationally?

Yes. Metanilic 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.