5-Amino-1,2,3-thiadiazole
Agrochemicals 2025-03-02
5-Amino-1,2,3-thiadiazole (CAS No. 4005-51-0)
1. Basic Information
- IUPAC Name: 5-Amino-1,2,3-thiadiazole
- Synonyms:
- 5-ATD
- 1,2,3-Thiadiazol-5-amine
- CAS Number: 4005-51-0
- Molecular Formula: C₂H₃N₃S
- Molecular Weight: 101.13 g/mol
- Appearance: White to pale yellow crystalline powder
- Odor: Slight sulfurous odor
2. Physical and Chemical Properties
| Property | Value |
|---|---|
| Melting Point | 90–92°C (194–198°F) |
| Boiling Point | Decomposes before boiling |
| Solubility | – Water: Partially soluble |
| – Organic solvents: Soluble in ethanol, methanol, DMSO | |
| pKa | ~4.5 (amino group) |
| Log Pow | 0.2 (octanol/water) |
3. Chemical Structure
N
// \\
S N
\\ /
C-NH₂
4. 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
5. 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
6. Applications
- Pharmaceuticals:
- Intermediate for antiviral and anticancer drugs
- Agrochemicals:
- Building block for fungicides and herbicides
- Organic Synthesis:
- Precursor for heterocyclic compounds (e.g., triazoles)
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