Sulfanilic acid (CAS 121-57-3) Sigma-Aldrich

Sulfanilic acid molecular structure — Molecular structure

The Sigma-Aldrich catalog lists 8 grades and pack sizes of Sulfanilic acid (CAS 121-57-3). Pick the code you need and request a quote for price and lead time from Klar Chem.

CAS	121-57-3
Molecular formula	C6H7NO3S
Molecular weight	173.19 g/mol
IUPAC name	4-aminobenzenesulfonic acid
Synonyms	4-Aminobenzenesulfonic acid · Sulphanilic acid · p-Aminobenzenesulfonic acid · Aniline-4-sulfonic acid · Aniline-p-sulfonic acid · Sulfanilsaeure

Safety & Hazards (GHS) Warning

Irritant

H315 Causes skin irritation
H317 May cause an allergic skin reaction
H319 Causes serious eye irritation

⚠️ For information only (source: EU CLP harmonised classification and ECHA notifications, via PubChem); not a substitute for the official Safety Data Sheet (SDS).

Catalog codes and grades

Brand	Product / grade	Code
Sigma	SULFANILIC ACID	1633506-200MG 86090-100G 86090-500G 86090-5G PHR1419-500MG	Request Quote
Sigma	SULFANILIC ACID, 99%, A.C.S. REAGENT	251917-100G 251917-25G 251917-500G	Request Quote

For information only; specifications and availability are confirmed at quotation. Prices are not listed.