Mercaptoacetic Acid Cas 68-11-1
Chemical Name: Mercaptoacetic acid
CAS No.: 68-11-1
Molecular Fomula: C2H4O2S
Molecular Weight: 92.12
Appearance: Supernatant liquid
Assay: 80%
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Mercaptoacetic Acid (CAS 68-11-1) Technical Guide
Table of Contents
1. Product Overview & Specifications
| Parameter | Value |
|---|---|
| Chemical Formula | C2H4O2S |
| Molecular Weight | 92.12 g/mol |
| CAS Number | 68-11-1 |
| Appearance | Colorless to pale yellow liquid |
| Melting Point | -16.5°C |
| Boiling Point | 96°C (at 5 mmHg) 123°C (at 3.87 kPa) |
| Density | 1.325–1.33 g/cm³ |
| Solubility | Miscible with water, ethanol, ether |
| Flash Point | 125°C |
2. Key Applications
Core Industrial Uses:
- Chemical Synthesis: Acts as a reducing agent in organic reactions and stabilizer for PVC.
- Metal Treatment: Forms stable complexes with iron, molybdenum, and copper for surface passivation and wastewater treatment.
- Cosmetics: Primary component in cold-wave perm solutions (ammonium thioglycolate) and depilatory agents.
- Polymer Industry: Crosslinking agent for synthetic rubbers and stabilizer for halogenated polymers.
- Analytical Chemistry: Colorimetric detection of trace metals (e.g., Fe, Mo, Sn) with sensitivity down to 0.1 ppm.
3. Practical Use Cases
Scenario 1: Hair Care Formulations
Concentration: 5–8% ammonium thioglycolate solution
Function: Breaks disulfide bonds in keratin for permanent wave formation (pH 8.5–9.5).
Scenario 2: Metal Surface Preparation
Usage: 2–5% aqueous solution for steel passivation
Result: Reduces corrosion rate by 85% in ASTM B117 salt spray tests.
Scenario 3: Polymer Stabilization
Dosage: 0.3–1.2% in PVC formulations
Outcome: Extends thermal stability by 40% during extrusion at 180°C.
4. Industry Client Success Stories
Case 1: Advanced Cosmetic Solutions Ltd. (France)
Challenge: Develop low-irritation perm solution for sensitive scalp.
Solution: Optimized 6.5% TGA formulation with pH 8.2 buffering system.
Result: 30% reduction in consumer complaints while maintaining curl efficiency.
Case 2: Wuhan Carnoss Technology Co., China
Application: Metal surface treatment for automotive components.
Implementation: 3% TGA-based pretreatment for aluminum alloys.
Performance: Achieved 500-hour neutral salt spray resistance (ISO 9227).
5. Contact for Custom Solutions
Request tailored specifications or technical support:
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