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Thiolactic acid(79-42-5)

Supplier Product Identification Physical and Chemical Properties First Aid Measures Handling and Storage Hazards Identification Exposure Controls/Personal Protection Fire Fighting Measures Accidental Release Measures Stability and Reactivity Transport Information

Product Identification

Product Name
Thiolactic acid

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

CAS
79-42-5

Formula
C3H6O2S

Molecular Weight
106.14

EINECS
201-206-5

RTECS
UF5250000

RTECS Class
Other

Merck
12,9476

Beilstein/Gmelin
506218

Beilstein Reference
4-03-00-00682

EC Class
harmful, corrosive

Physical and Chemical Properties

Appearance
An oily liquid with an unpleasant odor.

Solubility in water
Miscible

Melting Point
10 - 14

Boiling Point
205

Vapor Pressure
0.1 (25 C)

Density
1.193 g/cm3 (19 C)

pKa/pKb
3.74 (pKa)

Partition Coefficient
.44

Heat Of Vaporization
48.7 kJ/mol

Usage
Substance is used in depilatory and hair waving prepns.

Refractive Index
1.4827 (13 C)

First Aid Measures

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

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

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

Eyes
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 Storage

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

Handling
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 Identification

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

Inhalation
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.

Skin
Causes skin burns.

Eyes
Causes eye burns. Lachrymator.

Hazards
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)
2936

Exposure Controls/Personal Protection

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.

Respirators
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 Measures

Flash Point
87

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.