4-Aminotoluene-3-Sulfonic Acid
4-Aminotoluene-3-sulfonic Acid (CAS 88-44-8) is an aromatic amino sulfonic acid used as a chemical intermediate in dye synthesis, organic synthesis, and specialty chemical manufacturing. Send Inquiry
Product Description
4-Aminotoluene-3-Sulfonic Acid, CAS 88-44-8, 4B Acid
4-Aminotoluene-3-sulfonic Acid, also known as 2-Amino-5-methylbenzenesulfonic Acid, p-Toluidine-2-sulfonic Acid or PTMSA, is an aromatic organic compound containing amino, methyl, and sulfonic acid functional groups.
4B acid is a white or beige powder.Common organic amines, slightly soluble in hot water, insoluble in cold water, benzene and chlorobenzene, soluble in ethanol, ether and dilute alkali solution.
Product Chemical Properties
Chemical Name: 4-Aminotoluene-3-sulfonic Acid
CAS Number: 88-44-8
EC Number: 201-831-3
Molecular Formula: C7H9NO3S
Molecular Weight: 187.22 g/mol
IUPAC Name: 2-Amino-5-methylbenzenesulfonic Acid
Synonyms: 2-Amino-5-methylbenzenesulfonic Acid, p-Toluidine-2-sulfonic Acid, 4-Methylaniline-2-sulfonic Acid, 6-Amino-m-toluenesulfonic Acid, PTMSA, PTMS, 4-Aminotoluene-3-sulphonic Acid
Product Technical Specification
Appearance: white or beige powder
Assay (HPLC): ≥99.0%
Loss on Drying: ≤0.30%
Insoluble Matter in Alkali: ≤0.10%
Free p-Toluidine: ≤0.10%
Ash Content: ≤0.15%
pH (1% Suspension): 2.0 ~ 3.5
Assay (Diazotization Titration): ≥98.5%
Applications of 4-Aminotoluene-3-sulfonic Acid
As an important intermediate of organic pigment, 4B acid can be used to synthesize pigment brilliant red 6B and Risobel BK.
Packaging
25kg/bag.
Storage Requirements
Store 4-Aminotoluene-3-sulfonic Acid in tightly sealed containers in a cool, dry, and well-ventilated area.
Protect the product from moisture, direct sunlight, excessive heat, and contamination. Keep containers properly closed when not in use to maintain product quality and prevent exposure to environmental humidity.
4-Aminotoluene-3-sulfonic Acid Bulk Supply from China
Hosea Chem supports industrial sourcing inquiries for 4-Aminotoluene-3-sulfonic Acid (CAS 88-44-8), also known as 2-Amino-5-methylbenzenesulfonic Acid, p-Toluidine-2-sulfonic Acid, or PTMSA.
This aromatic amino sulfonic acid is used in dye intermediates, azo compound synthesis, organic synthesis, coordination chemistry, and specialty chemical manufacturing.