Melting point :10-14 °C (lit.)
Boiling point :102 °C/16 mmHg (lit.) 203-208 °C (lit.)
Density :1.196 g/mL at 25 °C (lit.)
vapor pressure :1.7 hPa (20 °C)
FEMA :3180 | 2-MERCAPTOPROPIONIC ACID
refractive index :n20/D 1.481(lit.)
Flash point :190 °F
storage temp. :2-8°C
solubility :1g/L in organic solvents at 20 ℃
form :Liquid
pka :pK1:4.32(0);pK2:10.20(SH) (25°C)
color :Clear colorless to slightly yellow
PH :2 (H2O, 20℃)(undiluted)
Odor :at 0.01 % in propylene glycol. meaty sulfurous roasted
Odor Type :sulfurous
Water Solubility :MISCIBLE
Merck :14,9340
JECFA Number :551
BRN :506218
InChIKey :PMNLUUOXGOOLSP-UHFFFAOYSA-N
LogP :1.15 at 20℃
CAS DataBase Reference :79-42-5(CAS DataBase Reference)
NIST Chemistry Reference :2-Mercaptopropanoic acid(79-42-5)
EPA Substance Registry System :Propanoic acid, 2-mercapto- (79-42-5)

Symbol(GHS):
Signal word:	Danger
Hazard statements:	Code Hazard statements Hazard class Category Signal word Pictogram P-Codes H314 Causes severe skin burns and eye damage Skin corrosion/irritation Category 1A, B, C Danger P260,P264, P280, P301+P330+ P331,P303+P361+P353, P363, P304+P340,P310, P321, P305+ P351+P338, P405,P501
Precautionary statements:	P280 Wear protective gloves/protective clothing/eye protection/face protection. P303+P361+P353 IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower. P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. P363 Wash contaminated clothing before reuse. P405 Store locked up.