2-Mercaptobenzimidazole

Name: 2-Mercaptobenzimidazole
SKU: 0

CAS No.: 583-39-1
Molecular Formula: C7H6N2S
Molecular Weight: 150.2

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product description

2-mercaptobenzimidazole is composed of a benzimidazole ring (nitrogen-containing heterocyclic) and a thiol group (-SH), with the thiol group attached to position 2 of the benzimidazole ring. White to light yellow crystalline powder. The pure substance is close to white. When exposed to air, it may be slightly yellow due to oxidation. Slightly soluble in water (solubility approximately 0.1g /L at 25℃), readily soluble in organic solvents such as ethanol, acetone, and dimethyl sulfoxide (DMSO);

Chemical Properties

Property	Value
Melting Point	300-304 °C (lit.)
Boiling Point	270.6±23.0 °C(Predicted)
Density	1.42
Vapor Pressure	0-0.001Pa at 25℃
Refractive Index	1.5500 (estimate)
Fp	>250°C
Storage Temp.	2-8°C
Solubility	0.3g/l
Pka	10.24±0.10(Predicted)
Form	Powder
Color	White to beige
Water Solubility	<0.1 g/100 mL at 23.5 ºC
Merck	14,1082
BRN	119867
Stability:	Stable. Incompatible with strong oxidizing agents.
LogP	0.88-1.66 at 20-25℃
CAS DataBase Reference	583-39-1(CAS DataBase Reference)
NIST Chemistry Reference	2-Mercaptobenzimidazole(583-39-1)
EPA Substance Registry System	2-Mercaptobenzimidazole (583-39-1)

Safety Information

Property	Value
Hazard symbol	Xn
Hazard class codes	20/21/22-36/37/38-22
Safety descriptions	26-36-24/25
UN dangerous goods number	UN 2811 6.1/PG 3
WGK Germany	2
RTECS number	DE1050000
Autoignition temperature	480 °C
TSCA	TSCA listed
Hazard class	6.1
Packing group	III
HS code	29339910
Storage class	6.1C - Combustible, acute toxicity Category 3 Toxic compounds or compounds causing chronic effects
Hazard class (category)	Acute toxicity, Category 3, Oral Hazardous to the aquatic environment — long-term hazard, Category 3 Skin sensitization, Category 1A Specific target organ toxicity — repeated exposure, Category 2
Toxicity	LD50 orally in Rabbit: 300 mg/kg

Product Usage

2-Mercaptobenzimidazole, with CAS No. 583-39-1 and chemical formula C₇H₆N₂S, appears as white to pale yellow crystalline powder, odorless, slightly soluble in water, and easily soluble in organic solvents such as ethanol and acetone. It has good antioxidant, anti-aging and metal protection properties. Its core application is in the rubber industry, serving as a rubber vulcanization accelerator and anti-aging agent, which can effectively increase the vulcanization speed of rubber, enhance the tensile strength and wear resistance of rubber products, and extend the service life of rubber. It is widely used in the production of natural rubber and synthetic rubber. At the same time, it can also be used as a metal corrosion inhibitor, which can form a protective film on the metal surface to prevent metal oxidation and rust; in the medical field, it can be used as an intermediate in organic synthesis for drug synthesis; in the dye industry, it is used to synthesize various functional dyes, and is a versatile functional chemical raw material in multiple fields.

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