Properties & Applications & PackagesInquiry

Product Overview

2-Mercaptobenzimidazole (MBI) is a sulfur-containing heterocyclic compound widely used in rubber processing as a protective additive. It helps improve resistance to heat, oxidation and ozone exposure, making it a reliable choice for compounds that need longer service life and stable performance.
Antioxidant MBI is a white or light yellow fine powder crystal, non-toxic, bitter taste, relative density 1.40-1.44, melting point not lower than 285℃, soluble in ether, acetone and ethyl acetate, insoluble in petroleum ether and dichloride. Methane, insoluble in carbon tetrachloride, benzene and water.

Key Specifications

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
Form	Powder
PKA	10.24±0.10(Predicted)
Color	White to beige
Water Solubility	<0.1 g/100 mL at 23.5 ºC

Performance Benefits

Protects rubber from oxidation and heat aging.
Improves product durability and storage stability.
Supports better processing performance in rubber compounding.
Widely accepted in tire and technical rubber formulations.

Typical Applications

Tires and tire components
Rubber hoses and belts
Industrial rubber products
Latex and elastomer systems
Rubber vulcanization and protection systems

This product is used as an antioxidant for natural rubber, diene synthetic rubber and latex, and can also be used for polyethylene. It has protective effects against oxygen, weather aging and static aging. It can also effectively protect against copper damage and overcome the adverse effects caused by excessive sulfur during crystal vulcanization. This product can be used alone or in combination with other antioxidants (such as DNP, AP and other non-polluting antioxidants) to achieve obvious synergistic effects. This product is easily dispersed in rubber, does not discolor under sunlight, and is slightly polluting. When used alone, the dosage is generally 1-1.5 parts. When the dosage exceeds 2 parts, clearing and frost will occur. The dosage in latex foam rubber is 0.5 parts. Because this crystal has a bitter taste, it is not suitable for use in rubber products that come into contact with food.

Packaging, Grades & Supply

We supply 2-Mercaptobenzimidazole (MBI) in bags, drums and bulk packaging for industrial buyers. COA and MSDS are available with each order. For procurement teams and distributors, please ask for the current MBI price and bulk supply terms based on your required volume.

Why choose Greenchem International?

Stable export supply and strict quality control.
Flexible packaging and bulk logistics support.
Technical support for rubber formulation and application selection.
Competitive commercial terms for long-term buyers.

Ordering & Inquiry

To buy 2-Mercaptobenzimidazole (MBI, CAS 583-39-1) or request COA, MSDS and a competitive quotation, please share your required grade, quantity and delivery country. We will reply with lead time and pricing.

2-Mercaptobenzimidazole, Antioxidant MBI