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?????

?????
????? ??? ???
?? ??:
79-42-5
???:
?????
???(??):
?????;???????
???:
2-Mercaptopropionic acid
???(??):
FEMA 3810;THIOLACTIC ACID;FEMA 3180;thiolactic;Thiomilchsure;Thio Latic Acid;2-thiolacticacid;2-Thiolactic acid;ThiolacticAcid>Thiolacticacid,95%
CBNumber:
CB0239767
???:
C3H6O2S
??? ??:
106.14
MOL ??:
79-42-5.mol
MSDS ??:
SDS

????? ??

???
10-14 °C (lit.)
?? ?
102 °C/16 mmHg (lit.) 203-208 °C (lit.)
??
1.196 g/mL at 25 °C (lit.)
???
1.7 hPa (20 °C)
FEMA
3180 | 2-MERCAPTOPROPIONIC ACID
???
n20/D 1.481(lit.)
???
190 °F
?? ??
2-8°C
???
1g/L in organic solvents at 20 ℃
??? ??
??
?? ?? (pKa)
pK1:4.32(0);pK2:10.20(SH) (25°C)
??
????~???
??????(pH)
2 (H2O, 20℃)(undiluted)
??
???? ??? ? 0.01%. ??? ?? ?? ??
?? ??
???
???? ??
synthetic
???
?? ??
JECFA Number
551
Merck
14,9340
BRN
506218
??? ?? ??
???
????
??
?? ??? ?? ?????
??? ?? ????? ????
InChI
1S/C3H6O2S/c1-2(6)3(4)5/h2,6H,1H3,(H,4,5)
InChIKey
PMNLUUOXGOOLSP-UHFFFAOYSA-N
SMILES
CC(S)C(O)=O
LogP
1.15 at 20℃
CAS ??????
79-42-5(CAS DataBase Reference)
NIST
2-Mercaptopropanoic acid(79-42-5)
EPA
Propanoic acid, 2-mercapto- (79-42-5)
??
  • ?? ? ?? ??
  • ?? ? ???? ?? (GHS)
??? ?? C
?? ???? ?? 34-22
????? 26-36/37/39-45-25
????(UN No.) UN 2936
WGK ?? 1
RTECS ?? UF5250000
TSCA TSCA listed
?? ?? 6.1
???? II
HS ?? 29309070
???? ??? 6.1A - Combustible acute toxic Cat. 1 and 2
very toxic hazardous materials
Hazard Classifications Skin Corr. 1B
?? LD50 orally in Rabbit: 730 mg/kg
????(GHS): Corrosion (GHS05)Skull and Crossbones (GHS06)
?? ?: Danger
??·?? ??:
?? ??·?? ?? ?? ?? ?? ?? ? ?? ?? P- ??
H314 ??? ?? ??? ?? ??? ??? ????? ?? ????? ?? 1A, B, C ?? P260,P264, P280, P301+P330+ P331,P303+P361+P353, P363, P304+P340,P310, P321, P305+ P351+P338, P405,P501
??????:
P261 ??·?·??·???·??·...·????? ??? ????.
P264 ?? ??? ?? ??? ????.
P264 ?? ??? ?? ??? ????.
P270 ? ??? ??? ??? ???, ???? ???? ???.
P271 ?? ?? ??? ? ?? ???? ?????.
P280 ????/???/???/?????? ?????.
P301+P330+P331 ???? ?? ?????. ??? ?? ?? ???.
P303+P361+P353 ??(?? ????)? ??? ??? ?? ??? ??? ????? ??? ?? ????/?????.
P363 ?? ??? ??? ??? ?????.
P403+P233 ??? ??? ? ?? ?? ??? ???? ?????.
P405 ???? ?????.
P501 ...? ??? / ??? ?? ???.
NFPA 704
2
3 0

????? MSDS


Thiolactic acid

????? C??? ??, ??, ??

??? ??

Clear colorless to slightly yellow liquid. Oily liquid; Melting point 10 ℃; Boiling point d-95 ~ 100 ℃ / 2133Pa, dl- 98.5 ~ 99.0 ℃ / 1866Pa; Density I-D19.24 1.193; Refractive index dl-nD: 1.4823; Optical rotation[α] D-45.47; soluble in water, ethanol and ether.

??

Depilatory, hair-waving preparations.

?? ??

By electrolysis of the corresponding sulfide, S(SCHMeCO2H)2.

?? ??

An oily liquid with an unpleasant odor. Toxic by ingestion and skin absorption. Used as a depilatory and in hair waving preparations.

??? ?? ??

Soluble in water and denser than water.

????

TOXIC; inhalation, ingestion or skin contact with material may cause severe injury or death. Contact with molten substance may cause severe burns to skin and eyes. Avoid any skin contact. Effects of contact or inhalation may be delayed. Fire may produce irritating, corrosive and/or toxic gases. Runoff from fire control or dilution water may be corrosive and/or toxic and cause pollution.

????

Combustible material: may burn but does not ignite readily. When heated, vapors may form explosive mixtures with air: indoors, outdoors and sewers explosion hazards. 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.

Safety Profile

Poison by ingestion. Moderately toxic by inhalation. When heated to decomposition it emits toxic fumes of SOx. See also SULFIDES and MERCAPTANS.

????? ?? ?? ? ???

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???( 256)?? ??
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