1-Phenyltetrazole-5-thiol
Agrochemicals 2025-03-02
1-Phenyl-1H-tetrazole-5-thiol (CAS No. 86-93-1)
1. Basic Information
- IUPAC Name: 1-Phenyl-1H-tetrazole-5-thiol
- Synonyms:
- 5-Mercapto-1-phenyltetrazole
- PMT
- CAS Number: 86-93-1
- Molecular Formula: C₇H₆N₄S
- Molecular Weight: 178.21 g/mol
- Appearance: White to pale yellow crystalline powder
- Odor: Slight sulfurous odor
2. Physical and Chemical Properties
| Property | Value |
|---|---|
| Melting Point | 210–215°C (dec.) |
| Solubility | – Water: Insoluble |
| – Organic solvents: Soluble in DMF, DMSO, alkaline solutions | |
| pKa | ~6.5 (thiol group) |
| Log Pow | 1.8 (octanol/water) |
3. Hazards (GHS Classification)
- Health Hazards:
- Harmful if swallowed (H302)
- Causes skin irritation (H315)
- Causes serious eye irritation (H319)
- Environmental: Toxic to aquatic life (H411)
- NFPA Rating: Health 2, Flammability 1, Reactivity 1
4. Storage and Handling
- Storage:
- Keep in tightly sealed amber containers
- Store in a cool, dry, well-ventilated area
- Handling:
- Use nitrile gloves, safety goggles, and a fume hood
- Avoid dust formation
5. Applications
- Photography:
- Antifogging agent in silver halide emulsions
- Corrosion Inhibition:
- Additive in metal plating baths
- Organic Synthesis:
- Ligand for transition metal complexes
- Precursor for heterocyclic compounds
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