What is 3-Mercaptopropionic Acid and how is it identified?

3-Mercaptopropionic acid is a bifunctional thiol-acid with CAS 107-96-0, molecular formula C₃H₆O₂S and molecular weight 106.14. It is also called 3-MPA, beta-mercaptopropionic acid and 3-sulfanylpropanoic acid.

Which specifications should be checked when purchasing 3-MPA?

Confirm assay, color, water content, related sulfur impurities and acidity or acid value. The product is normally a clear liquid with a strong sulfide odor, so the batch analysis should state the actual purity and test method for the intended synthesis or stabilization use.

What is 3-Mercaptopropionic Acid used for?

It is used as a pharmaceutical and fine-chemical intermediate, PVC stabilizer, antioxidant, catalyst and biochemical reagent. The thiol and carboxylic acid groups make it useful for conjugate addition, metal binding, polymer modification and controlled synthesis.

3-Mercaptopropionic Acid CAS 107-96-0

3-Mercaptopropionic Acid (3-MPA), CAS 107-96-0, is a thiol-carboxylic acid used as a chain-transfer agent and synthesis intermediate. Confirm the required purity and handling requirements for the intended process.

CAS: 107-96-0
Synonyms: 3-Thiopropanoic acid, Beta-Mercaptopropionic acid, 3-MPA, Thiohydracrylic acid, 3-Sulfanylpropanoic acid
Einecs: 203-537-0
Molecular Formula: C₃H₆O₂S
Grade: Industrial grade 99%
Package: 200kg iron drum or 50kg plastic drum packing

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Product Description

3-Mercaptopropionic Acid (3-MPA), CAS 107-96-0, is also named beta-mercaptopropionic acid or 3-sulfanylpropanoic acid; the EC/EINECS number is 203-537-0.

Synonyms: 3-Thiopropanoic acid; Beta-Mercaptopropionic acid; 3-MPA; Thiohydracrylic acid; 3-Sulfanylpropanoic acid.

CAS: 107-96-0.

Molecular formula: C₃H₆O₂S.

Molecular weight: 106.14.

EC number: 203-537-0.

It is a clear, colorless to light-yellow liquid with a strong sulfide odor.

Typical properties include melting point about 16.8 °C, boiling point about 111.5 °C at 2.0 kPa, flash point about 93 °C, and relative density about 1.22 at 25 °C. It is soluble in water, ethanol and benzene.

It is widely used as a chain-transfer agent for molecular-weight control in polymer synthesis, including polycarboxylate superplasticizers.

It is also used as a pharmaceutical and fine-chemical intermediate, PVC stabilizer intermediate, antioxidant, catalyst and biochemical reagent.

Confirm assay or purity, color, water content, related sulfur impurities and acidity; typical industrial grades are about 99%.

Store in tightly closed, corrosion-resistant containers in a cool, ventilated area away from strong oxidizers, reducers, bases and ignition sources. The material has a strong mercaptan odor and may be corrosive, so use vapor controls, chemical-resistant PPE and suitable spill containment.

Confirm the current product-specific specification.

Confirm packaging with the requested quantity and destination requirements.

Document requirements should be confirmed from the current specification, SDS, COA, or other product-specific files.

Regulated-use suitability must be confirmed separately with current product-specific documentation.

The page is an RFQ entry point and does not state stock, price, MOQ, or fixed lead time.

For an RFQ, state the intended use, required specification, quantity, packaging, destination, and document needs.

FAQ - Technical & Supply Chain

Q:
What is 3-Mercaptopropionic Acid and how is it identified?

A: 3-Mercaptopropionic acid is a bifunctional thiol-acid with CAS 107-96-0, molecular formula C₃H₆O₂S and molecular weight 106.14. It is also called 3-MPA, beta-mercaptopropionic acid and 3-sulfanylpropanoic acid.
Q:
Which specifications should be checked when purchasing 3-MPA?

A: Confirm assay, color, water content, related sulfur impurities and acidity or acid value. The product is normally a clear liquid with a strong sulfide odor, so the batch analysis should state the actual purity and test method for the intended synthesis or stabilization use.
Q:
What is 3-Mercaptopropionic Acid used for?

A: It is used as a pharmaceutical and fine-chemical intermediate, PVC stabilizer, antioxidant, catalyst and biochemical reagent. The thiol and carboxylic acid groups make it useful for conjugate addition, metal binding, polymer modification and controlled synthesis.
Q:
How should 3-Mercaptopropionic Acid be stored and handled?

A: Store in tightly closed, corrosion-resistant containers in a cool, ventilated area away from strong oxidizers, reducers, bases and ignition sources. The material has a strong mercaptan odor and may be corrosive, so use vapor controls, chemical-resistant PPE and suitable spill and disposal procedures.

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