Product Name: 5-Aminosalicylic acid 
Synonyms: 5-Amino-2-hydroxybenzoic acid; Mesalamine; 5-ASA; 5-Amino salicylic acidl; Mesalazine; Mesalmine; 5-Amino salicylic Acid; 5-amino-2-hydroxybenzoate; 5-amino saliclic acid; Aminosalicylic acid, 5- 
Assay: 99.5% 
CAS No.: 89-57-6 
EINECS No.: 201-919-1 
Molecular Formula: C7H7NO3 
Molecular Weight: 153.14 
Melting point: 280o C 
Boiling point: 403.9° C at 760 mmHg 
Flashing point: 198.1° C 
Water Solubillity: <0.1 g/100 mL at 21o C 
Appearance: White crystaline powder 
Packing: 25kg/Drum 
Application: Used for the treatment of ulcerative colitis 

Specification

Appearance	Almost white or light grey or light        pink powder or crystals	light grey powder
Identification	The IR absorption spectrum conform the reference spectrum	Complies
Appearance of solution	Clarity    Clear Absorbance     ≤ 0.15 (440nm)                                   ≤ 0.10 (650nm)	Clear 0.033 0.009
Reducing substances (4mg/ml HCl solution)	The solution turns blue or violet-brown after addition of Starch solution & 0.01M iodine	The solution turns violet-brown
Related substances (HPLC)	Impurity  B                   ≤0.2% Impurity D                   ≤0.1% Impurity G                   ≤0.1% Impurity H                   ≤0.3% Any other impurity        ≤0.05% Total impurity               ≤1.0%	Nf Nf 0.01% Nf 0.03% 0.07%
Impurity A&C (HPLC)	Impurity A                   ≤200 ppm Impurity C                   ≤200 ppm	Nf Nf
Impurity K	≤10 ppm	Nf
Chlorides	≤0.1%	Nf
Sulphates	≤200 ppm
Heavy metals	≤20 ppm
Loss on drying	≤0.5% (1.000g,100~105°C)	0.1%
Sulphated ash	≤0.2%	0.03%
Assay	98.5%~101.0% (Anhydrous)	99.5%