Sodium Thiomethoxide CAS No. 5188-07-8
Agrochemicals 2025-03-02
Sodium Thiomethoxide
CAS No.: 5188-07-8 | EC No.: 225-969-9
1. Chemical Identification
| Property | Specification |
|---|---|
| IUPAC Name | Sodium methanethiolate |
| Molecular Formula | CH₃NaS |
| Molecular Weight | 70.09 g/mol |
| Appearance | White to off-white powder |
| Density | 1.12 g/cm³ at 20°C |
| Vapor Pressure | 29 hPa at 25°C |
| Water Solubility | Soluble |
| pH | Strongly alkaline (12-14) |
Synonyms:
Sodium methyl mercaptide, Sodium methanethiolate
2. Key Applications
Chemical Synthesis
- Nucleophilic Substitution:
✓ Production of methyl aryl sulfides
✓ SN2 dealkylation of esters/ethers
Industrial Manufacturing
- Pesticides:
✓ Methomyl insecticide synthesis
✓ Other thioether pesticides - Pharmaceuticals:
✓ Methionine production
✓ Sulfur-containing drug intermediates
Specialty Chemistry
- Dye intermediate
- Polymer modification agent
3. Product Advantages
✔ Strong Nucleophilicity – High reactivity in substitution reactions
✔ Versatile Intermediate – Multiple industrial applications
✔ Controlled Reactivity – Predictable reaction kinetics
4. Physical & Chemical Properties
- Thermal Stability:
- Stable at room temperature
- Decomposes at >250°C
- Reactivity:
- Reacts violently with water/acid
- Air-sensitive (store under inert gas)
5. Handling & Storage
| Parameter | Requirement |
|---|---|
| Storage Temp | 2-8°C (under nitrogen/argon) |
| Packaging | 25kg sealed metal drums |
| Shelf Life | 12 months |
| Special Notes | Moisture-sensitive |
6. Safety Information
Danger!
- H314: Causes severe skin burns and eye damage
- H290: May be corrosive to metals
- H335: May cause respiratory irritation
Protective Measures:
- P280: Wear chemical-resistant gloves/face shield
- P303+P361+P353: Skin contact wash procedure
- P305+P351+P338: Eye contact rinse protocol
7. Quality Specifications
- Purity: ≥95% (titration)
- Sulfur Content: 44-46%
- Water Content: ≤0.5%
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