5-(1H-pyrrol-1-yl)-2- Mercaptobenzimidazole
Item	Specification	Result
Appearance	White to off-white powder	Complies
Identification	IR absorption: Conforms to standard	Complies
Water by KF	0.5% max	0.28%
Residue on ignition	0.5% max	0.36%
Purity (HPLC)	Not less than 98%	98.9%
Conclusion	The material completes with the house standard.