ChemicalBook >>2-Mercaptopropionic acid>>Thiolactic acid(79-42-5)

Thiolactic acid(79-42-5)

Thiolactic acid(79-42-5)
Product IdentificationBack to Contents
【Product Name】

Thiolactic acid

2-Mercaptopropanoic acid
2-Mercaptopropionic acid
2-Sulfanylpropanoic acid


【Molecular Weight】



【RTECS Class】



【Beilstein Reference】

【EC Class】

harmful, corrosive
Physical and Chemical PropertiesBack to Contents

An oily liquid with an unpleasant odor.
【Solubility in water】

【Melting Point】

10 - 14
【Boiling Point】

【Vapor Pressure】

0.1 (25 C)

1.193 g/cm3 (19 C)

3.74 (pKa)
【Partition Coefficient】

【Heat Of Vaporization】

48.7 kJ/mol

Substance is used in depilatory and hair waving prepns.
【Refractive Index】

1.4827 (13 C)
First Aid MeasuresBack to Contents

Do NOT induce vomiting. If victim is conscious and alert, give 2-4 cupfuls of milk or water. Get medical aid immediately.

Get medical aid immediately. Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen.

Get medical aid. Immediately flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes.

Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid immediately.
Handling and StorageBack to Contents

Keep away from sources of ignition. Store in a cool, dry place. Store in a tightly closed container. Corrosives area.

Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Avoid contact with heat, sparks and flame. Do not get on skin or in eyes. Do not ingest or inhale. Use only in a chemical fume hood.
Hazards IdentificationBack to Contents

Causes gastrointestinal tract burns. May cause perforation of the digestive tract.

May cause irritation of the respiratory tract with burning pain in the nose and throat, coughing, wheezing, shortness of breath and pulmonary edema. Inhalation may be fatal as a result of spasm, inflammation, edema of the larynx and bronchi, chemical pneumonitis and pulmonary edema.

Causes skin burns.

Causes eye burns. Lachrymator.

When heated, vapors may form explosive mixtures with air: indoors, outdoors, and sewers explosion hazards. May polymerize explosively when heated or involved in a fire. Contact with metals may evolve flammable hydrogen gas. Containers may explode when heated. Runoff may pollute waterways. Substance may be transported in a molten form.
【EC Risk Phrase】

R 22 34
【EC Safety Phrase】

S 26 36/37/39 45
【UN (DOT)】

Exposure Controls/Personal ProtectionBack to Contents
【Personal Protection】

Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166. Skin: Wear appropriate protective gloves and clothing to prevent skin exposure. Clothing: Wear appropriate protective clothing to prevent skin exposure.

Follow the OSHA respirator regulations found in 29CFR 1910.134 or European Standard EN 149. Always use a NIOSH or European Standard EN 149 approved respirator when necessary.
Fire Fighting MeasuresBack to Contents
【Flash Point】

【Fire Fighting】

Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Will burn if involved in a fire. To extinguish fire use water spray, dry chemical, carbon dioxide, or chemical foam.
【Fire Potential】

May burn but does not ignite readily.
Accidental Release MeasuresBack to Contents
【Small spills/leaks】

Absorb spill with inert material, (e.g., dry sand or earth), then place into a chemical waste container.
Stability and ReactivityBack to Contents
【Disposal Code】


Has not been fully evaluated.

Strong oxidizing agents, strong bases, strong reducing agents.

Carbon monoxide, carbon dioxide, sulfur oxides (SOx), including sulfur oxide and sulfur dioxide.
【Combustion Products】

Fire may produce irritating, corrosive and/or toxic gases.
Transport InformationBack to Contents
【UN Number】

【Hazard Class】

【Packing Group】

【HS Code】

2930 90 70
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