Propanoic acid,2-mercapto-

Molecular Structure of 2-Thiolactic acid (CAS NO.79-42-5):

IUPAC Name: 2-Sulfanylpropanoic acid 
Molecular Formula: C₃H₆O₂S
Molecular Weight: 106.14
XLogP3-AA: 0.5
H-Bond Donor: 1
H-Bond Acceptor: 2 
EINECS: 201-206-5 
Index of Refraction: 1.494
Molar Refractivity: 25.36 cm³
Molar Volume: 87.1 cm³
Surface Tension: 42.6 dyne/cm
Density: 1.218 g/cm³
Flash Point: 87 °C
Enthalpy of Vaporization: 48.66 kJ/mol
Boiling Point: 205.3 °C at 760 mmHg
Vapour Pressure: 0.103 mmHg at 25 °C
Melting Point: 10-14 °C(lit.)
Water Solubility: MISCIBLE
Product Categories: acid Flavor
Appearance: Clear colorless to slightly yellow liquid
Canonical SMILES: CC(C(=O)O)S
InChI: InChI=1S/C3H6O2S/c1-2(6)3(4)5/h2,6H,1H3,(H,4,5)
InChIKey: PMNLUUOXGOOLSP-UHFFFAOYSA-N
Air & Water Reactions: Soluble in water and denser than water

 2-Thiolactic acid (CAS NO.79-42-5) is used as temporarily allow the use of food spices. It is also used as a depilatory and in hair waving preparations.

Reported in EPA TSCA Inventory.

Safety Information of 2-Thiolactic acid (CAS NO.79-42-5):
Hazard Codes: C
Risk Statements: 34-22 
R22:Harmful if swallowed. 
R34:Causes burns.
Safety Statements: 26-36/37/39-45-25 
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. 
S25:Avoid contact with eyes. 
S45:In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) 
S36/37/39:Wear suitable protective clothing, gloves and eye/face protection.
RIDADR: UN 2936 6.1/PG 2
WGK Germany: 1
RTECS: UF5250000
HazardClass: 6.1
PackingGroup: II
Poison by ingestion. Moderately toxic by inhalation. When heated to decomposition it emits toxic fumes of SO_x.

DOT Classification:  6.1; Label: Poison

 2-Thiolactic acid (CAS NO.79-42-5), its Synonyms are 2-Mercaptopropanoic acid ; 2-Mercaptopropionic acid ; Propanoic acid, 2-mercapto- ; Propionic acid, 2-mercapto- ; Thiolactic acid ; alpha-Mercaptopropanoic acid ; alpha-Mercaptopropionic acid ; 2-Thiolpropionic acid .