Thiolactic Acid

Product Description

Green Stone Swiss supplies high-purity Thiolactic Acid manufactured under strict GMP-aligned quality systems, ensuring consistent batch-to-batch performance for professional cosmetic and personal care brands worldwide. Our direct factory supply model delivers reliable bulk quantities with full technical documentation and free sample support.

Thiolactic Acid is 2-mercaptopropionic acid. In cosmetic use it is a water-soluble specialty acid, not lactic acid and not a fragrance. This grade is a colorless to pale yellow liquid that mixes with water.

Rinse-off and selected leave-on formulas continue to specify this INCI when the thiol acid itself is required. Cosmetic-grade Thiolactic Acid remains a bulk acid when the assay is on the COA.

Product Specification

• INCI Name: Thiolactic Acid
• CAS No.: 79-42-5
• Molecular Formula: C₃H₆O₂S
• Molecular Weight: 106.14 Da
• Appearance: Colorless to pale yellow liquid
• Purity: Typical ≥98%
• Solubility: Soluble in water
• Suggested pH: 3.5–6.0 in finished systems
• Storage: Store in a cool, dry place; protect from air; keep containers closed

Key Benefits & Applications

Thiolactic Acid is a water-soluble specialty acid used at a low level.

• Added to the water phase
• Distinct from lactic acid
• Fits systems that specifically name the thiol acid
• Typical use level: 0.1–1.0% in the finished formula

Formulation Guidelines

Follow these guidelines to add Thiolactic Acid and then set the pH.

• Suggested Use Level: Typical 0.1–1.0% in the finished formula
• pH Range: Suggested 3.5–6.0
• Addition: Add to the water phase and adjust pH; avoid high heat
• Stability: Keep containers tightly closed; the liquid can oxidize in air
• Combine with Bisabolol when a soothing oil-phase active is needed beside this acid.