2-Mercapto-5-Methoxybenzimidazole CAS No.37052-78-1

2-Mercapto-5-methoxybenzimidazole (CAS No. 37052-78-1) 

1. Basic Information

Chemical Name: 2-Mercapto-5-methoxybenzimidazoleSynonyms:5-Methoxy-1H-benzimidazole-2-thiol5-Methoxy-2-benzimidazolethiolCAS Number: 37052-78-1Molecular Formula: C₈H₈N₂OSMolecular Weight: 180.23 g/molAppearance: White to off-white crystalline powderOdor: Mild sulfur-like odor

2. Physical and Chemical Properties

Melting Point: ~280–285 °C (decomposes)Solubility:Water: Slightly solubleOrganic solvents: Soluble in DMSO, methanol, ethanol; partially soluble in acetonepKa: ~8–10 (thiol group)Stability: Stable under normal conditions, but may decompose at high temperatures

3. Hazards (GHS Classification)

Health Hazards:Skin/Eye Irritation: May cause irritation (H315, H319)Inhalation: Dust may cause respiratory irritation (H335)Sensitization: Potential skin sensitizer (H317)Environmental Hazards: May be harmful to aquatic organisms (H412)NFPA Rating: Health 2, Flammability 1, Reactivity 0

4. Storage and Handling

Storage: Store in a cool, dry place away from strong oxidizers and acids. Keep container tightly closed.Handling: Use PPE (gloves, safety goggles, lab coat) and handle in a well-ventilated area or fume hood.

5. Applications

Pharmaceuticals: Intermediate in drug synthesis (e.g., antiparasitic agents).Corrosion inhibitors: Used in metal protection formulations.Organic synthesis: Building block for benzimidazole derivatives.

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