Sodium Thiomethoxide (CAS 5188-07-8): Technical Overview
Table of Contents
1. Chemical Profile & Specifications
| Parameter | Value | Test Method |
|---|---|---|
| CAS Registry | 5188-07-8 | OECD 101 |
| Molecular Formula | CH3NaS | Mass Spectrometry |
| Molecular Weight | 70.09 g/mol | ISO 6978 |
| Physical State | Colorless liquid (20% aqueous solution) White crystalline solid (anhydrous) |
Visual Inspection |
| Density | 1.12-1.14 g/cm³ (liquid, 20°C) | ASTM D4052 |
| Flash Point | 27°C (closed cup) | ISO 3679 |
| pH (20% solution) | 12.5-13.5 | EPA 150.1 |
2. Functional Applications
Core Industrial Uses:
- Pharmaceutical Synthesis: Key intermediate for methionine production (precursor to vitamin U)
- Agrochemical Manufacturing: Building block for pesticides including methomyl and thiocarbamates
- Organic Reactions: Effective nucleophile in SN2 reactions, mercaptation processes
- Metal Processing: Corrosion inhibitor in alkaline systems (pH >10)
- Gas Odorization: Source compound for methanethiol in natural gas leak detection
3. Operational Guidelines
Recommended Handling Procedures:
| Parameter | Requirement |
|---|---|
| Storage Temperature | 2-8°C (liquid form) Ambient (solid form) |
| Material Compatibility | HDPE/LDPE containers Stainless steel 316 equipment |
| Solution Stability | 6 months under inert atmosphere (N2) |
| Neutralization Protocol | Controlled acid addition (H2SO4) with gas scrubbing |
4. Safety Protocols
| Hazard Category | Preventive Measures |
|---|---|
| Flammability (Class IB) | Ground all equipment Explosion-proof lighting |
| Corrosivity (pH 12.5+) | Chemical-resistant PPE (Butyl rubber) |
| Toxic Exposure | Fume hoods with ≥100 fpm face velocity |
| Reactive Incompatibilities | Isolate from acids, oxidizers, halogens |
5. Industrial Case Studies
Case 1: Pharmaceutical API Production
Client: Tier-1 European Pharma Manufacturer
Application: Cysteine derivative synthesis
Technical Parameters:
– Reaction scale: 8,000L batch
– Yield improvement: 12% vs. alternative reagents
– Purity specification: ≥99.5% (HPLC)
Case 2: Specialty Crop Protection
Client: US Agrochemical Formulator
Application: Thioether insecticide synthesis
Performance Metrics:
– Production capacity: 25 MT/month
– Waste reduction: 40% through closed-loop system
– Regulatory compliance: EPA 40 CFR Part 158
Technical Consultation
For material specifications, SDS documents, or application support:
Email: info@vivalr.com
Tel: (86) 15866781826
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