GHS Classification: Corrosive (GHS05), Acute Toxicity (GHS06), Irritant (GHS07)
Hazard Statements: Causes severe skin burns and eye damage; toxic if swallowed or in contact with skin; may cause respiratory irritation.
UN Number: UN 2922
Hazard Class: 8 (Corrosive Substances), 6.1 (Toxic Substances)
Packing Group: II
GTC-141

Carboxylic Acids
3-Mercaptopropionic Acid
- CAS No.
- 107-96-0
- Catalogue ID
- GTC-141
3-Mercaptopropionic Acid, CAS 107-96-0. Source-derived identification, physical data and applications are provided for catalogue reference; request the current specification, COA and SDS for the required grade.
3-Sulfanylpropanoic acid; 3-Mercaptopropanoic acid; β-Mercaptopropionic acid; β-Thiopropionic acid; 3-Thiopropionic acid; 3-Thiopropanoic acid; 3-MPA
Supplied catalogue source: GTC-141 · Page 10
Reference data — confirm before ordering or use
The information below is a structured migration from the supplied catalogue snapshot. It is not a current product specification, COA or SDS. Confirm the actual supplier, grade, batch documents, classification, packing and destination requirements for your enquiry.
Basic Information of 3-MPA
3-Mercaptopropionic Acid (CAS No. 107-96-0) is manufactured to meet stringent quality standards, ensuring high purity and consistent performance for your specific industrial and research requirements:
| CAS No.: | 107-96-0 |
|---|---|
| EC No.: | 203-537-0 |
| Linear Formula: | HSCH₂CH₂COOH |
| Molecular Weight: | 106.14 |
| Appearance: | Colorless to light yellow liquid with a characteristic pungent odor (typical of thiols). |
| Odor: | Strong, unpleasant, sulfur-like odor. |
| Melting Point: | 15-18 °C (lit.) |
| Boiling point: | 110-111 °C/15 mmHg (lit.) |
| Density: | 1.218 g/mL at 25 °C (lit.) |
| Solubility: | Soluble in water, alcohol, ether, and other organic solvents. |
| Flash Point: | 201 °F |
| Purity: | Corrosive liquid with a strong, reducing nature due to the thiol group. |
| RIDADR: | UN 2922 8,6.1/PG 2 |
| Chemical Structure: | ![]() |
Our commitment to delivering high-purity 3-MPA ensures a reliable and effective reagent for your diverse chemical processes and research endeavors.
Primary Applications of 3-Mercaptopropionic Acid (3-MPA)
The dual functionality of 3-Mercaptopropionic Acid, featuring both a carboxylic acid and a reactive thiol group, drives its utilization in a wide array of applications:
Polymerization Regulator:
3-MPA acts as a chain transfer agent and polymerization regulator in various polymerization processes, controlling the molecular weight of polymers and influencing their final properties.
Antioxidant and Stabilizer:
The thiol group in 3-MPA allows it to function as an effective antioxidant, scavenging free radicals and inhibiting oxidative degradation in various formulations, including polymers and other susceptible materials.
Pharmaceutical Intermediate:
3-MPA is a crucial intermediate in the synthesis of numerous pharmaceutical compounds, often utilized to introduce sulfur-containing moieties into drug molecules, impacting their biological activity and pharmacokinetic properties.
Biocide Intermediate:
It serves as a precursor in the production of certain biocides and antimicrobial agents, leveraging the reactivity of the thiol group to create compounds with specific biological activities.
Surface Modification and Ligand Chemistry:
The thiol group readily binds to metal surfaces, making 3-MPA useful for surface modification in nanotechnology and materials science. It also serves as a ligand in the synthesis of metal nanoparticles and coordination complexes.
Specialty Chemical Synthesis:
3-MPA is a versatile building block for the synthesis of a wide range of specialty chemicals, including thioesters, thioethers, and other sulfur-containing organic compounds used in various industrial processes and research applications.
Exceptional Purity & Consistency: Our 3-MPA is manufactured to high purity standards, ensuring reliable and effective performance in your sensitive applications and research.
Commitment to Quality & Safety: We adhere to the highest industry standards for quality management, safety, and environmental responsibility across all our operations, ensuring peace of mind for our clients.
Hazards Classification



Confirm the current commercial product record.
Include the required grade or purity, quantity, preferred packing, destination country/port and required document set.
- 01Current specification
- 02Batch or sample COA
- 03Product- and supplier-specific SDS
- 04Packing and shipping review
