Shandong Huashang Chemical Co., Ltd. is a high-tech enterprise focused on industry of fine chemicals research and develop, produce and sale. Shandong Huashang Chemical Co., Ltd. is located in Shan Dong Ji Nan China. we have the ability to provide you high quality products. More than 90 % of our products are exported to developed countries and regions such as north America, Europe, Japan, South Korea and the Middle East.
1. Basic Product Information
- Full Name: 2-Mercaptobenzimidazole
- Abbreviation: MBI
- Aliases: 1H-Benzimidazole-2-thiol, 2-Benzimidazolethiol
- CAS No.: 583-39-1
- EINECS No.: 209-506-2
- Molecular Formula: C7H6N2S
- Molecular Weight: 150.20
- Chemical Classification: Heterocyclic organic fine chemical, rubber antioxidant, metal corrosion inhibitor, pharmaceutical intermediate
- Core Product Features
Excellent anti-aging performance for rubber, good heat resistance and ozone resistance; effective corrosion inhibition for copper and copper alloys; stable heterocyclic thiol structure, low volatility, good compatibility with rubber polymers and coating systems, widely used in rubber industry, metal anti-rust fluid, pharmaceutical synthesis and electroplating additives.
2. Detailed Physical & Chemical Properties
2.1 Physical Properties
- Appearance: White or off-white crystalline powder, uniform fine particles, no caking
- Odor: Slight sulfur characteristic odor
- Solubility: Slightly soluble in ethanol, methanol, acetone; insoluble in water, benzene, aliphatic hydrocarbon solvents
- Melting Point: 298–302℃
- Boiling Point: Decompose above 350℃, no fixed boiling point under normal pressure
- pH Value (suspension in water): Neutral to weak alkaline
- Hygroscopicity: Non-hygroscopic, stable under normal storage environment
2.2 Chemical Properties
- Structural Feature: Contains benzimidazole ring and reactive thiol (-SH) group, easy to form chelate complex with copper ions
- Thermal Stability: Stable below 260℃; high temperature over melting point will produce sulfur-containing decomposition gas
- Acid & Alkali Stability: Stable in neutral and weak alkaline medium; reacts with strong oxidants to generate disulfide by-products
- Anti-oxidation Mechanism: Captures free radicals produced during rubber thermal oxidation, delays polymer aging and cracking
- Metal Chelation: Forms dense protective film on copper surface to prevent oxidation and discoloration of copper materials
3. Comprehensive Product Applications
3.1 Rubber & Plastic Industry (Main Application)
High-efficiency antioxidant for natural rubber, synthetic rubber, latex and rubber products. It effectively inhibits thermal aging, ozone aging and metal ion catalytic aging of rubber, extends service life of tires, hoses, rubber seals and latex gloves.
3.2 Metal Corrosion Inhibitor Field
Special copper and copper alloy anti-tarnish agent for cutting fluid, cooling liquid, electroplating passivation solution and metal cleaning agent. It prevents copper surface oxidation, discoloration and blackening during processing and storage.
3.3 Pharmaceutical & Biochemical Intermediates
Key heterocyclic building block for synthesis of anti-ulcer drugs, anti-inflammatory medicines and fungicides; used in laboratory synthesis of benzimidazole derivatives.
3.4 Coating & Electroplating Additives
Auxiliary additive for water-based anti-rust coatings, metal surface treatment agents, brightening agent stabilizer for copper electroplating bath.
3.5 Other Fine Chemical Fields
UV stabilizer for polymer materials, analytical reagent for copper ion detection, bacteriostatic additive for industrial circulating water.
4. Full Parameter Specification Table
| Item | Detailed Standard Specification |
| CAS No. | 583-39-1 |
| Molecular Formula | C7H6N2S |
| Molecular Weight | 150.20 |
| Appearance | White / off-white crystalline powder |
| Melting Point | 298–302℃ |
| Boiling Point | Decompose over 350℃, no fixed boiling point |
| Purity (HPLC) | ≥99.0% |
| Moisture Content | ≤0.3% |
| Ash Content | ≤0.15% |
| Free Sulfur Impurity | ≤0.05% |
| Bulk Packaging | 25kg PE lined kraft paper drum |
| Sample Packaging | 1kg / 5kg sealed plastic bag |
| Storage Condition | Sealed cool dry warehouse, away from strong oxidants, strong acid and direct sunlight |
| Transportation Standard | General organic fine chemical, non-dangerous goods; avoid mixing with oxidizing chemicals during transit |
| Shelf Life | 24 months under intact original sealed packaging |
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