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Cas Database |
| Name |
2-Mercaptopropionic acid |
EINECS | 201-206-5 |
| CAS No. | 79-42-5 | Density | 1.218 g/cm3 |
| PSA | 76.10000 | LogP | 0.38930 |
| Solubility | miscible with water | Melting Point |
10-14 °C(lit.) |
| Formula | C3H6O2S | Boiling Point | 205.3 °C at 760 mmHg |
| Molecular Weight | 106.145 | Flash Point | 87 °C |
| Transport Information | UN 2936 6.1/PG 2 | Appearance | Clear colorless to slightly yellow liquid |
| Safety | 26-36/37/39-45-25 | Risk Codes | 34-22 |
| Molecular Structure |
|
Hazard Symbols |
 C
|
| Synonyms |
Propionicacid, 2-mercapto- (8CI);Propionic acid, a-mercapto- (3CI);2-Thiolactic acid;Thiolacticacid;a-Mercaptopropanoic acid;a-Mercaptopropionic acid;Thiolactic acid; |
Article Data | 55 |
2-Mercaptopropionic acid Synthetic route
- 19788-49-9
Ethyl 2-mercaptopropionate
- 79-42-5
2-mercaptopropanoic acid
| Conditions | Yield |
|---|---|
| With sodium hydroxide In phosphate buffer for 2h; | 99% |
- 129975-20-8
Ethyl (R,S)-2-(Acetylthio)propionate
- 79-42-5
2-mercaptopropanoic acid
| Conditions | Yield |
|---|---|
| With sodium hydroxide |
- 805179-10-6
2,2'-trisulfanediyl-di-propionic acid
- 79-42-5
2-mercaptopropanoic acid
| Conditions | Yield |
|---|---|
| With hydrogenchloride; zinc | |
| With sodium amalgam | |
| With sulfuric acid durch Elektrolytische Reduktion an Blei-Kathode; |
| Conditions | Yield |
|---|---|
| With sodium hydrogensulfide; hydrogen sulfide; water und Erhitzen des Reaktionsgemisches mit wss.Salzsaeure; |
| Conditions | Yield |
|---|---|
| With alkali disulfide Reduktion der entstehenden Thiodilactylsaeure mit granuliertem Zink und Schwefelsaeure; |
- 535-13-7
2-chloro-propanoic acid, ethyl ester
- 922-52-1, 4775-93-3, 20664-26-0, 20664-27-1, 21793-77-1
(S)-2-((S)-1-Carboxy-ethyldisulfanyl)-propionic acid
B
- 79-42-5
2-mercaptopropanoic acid
| Conditions | Yield |
|---|---|
| With potassium hydrosulfide |
- 51440-83-6
2-(ethoxycarbonothioyl)sulfanyl propanoic acid
- 79-42-5
2-mercaptopropanoic acid
| Conditions | Yield |
|---|---|
| With ammonium hydroxide; ethanol ueber mehrere Stufen; |
- 51440-83-6
2-(ethoxycarbonothioyl)sulfanyl propanoic acid
A
- 625-57-0
O-ethyl thiocarbamate
B
- 79-42-5
2-mercaptopropanoic acid
| Conditions | Yield |
|---|---|
| With ammonia |
| Conditions | Yield |
|---|---|
| With hydrogenchloride; zinc | |
| With sodium amalgam |
- 21793-77-1
(+)-2,2'-dithiobispropionic acid
- 79-42-5
2-mercaptopropanoic acid
| Conditions | Yield |
|---|---|
| at 25℃; Redoxgleichgewicht (polarimetrische Bestimmung); |
2-Mercaptopropionic acid Chemical Properties
Molecular Structure of 2-Thiolactic acid (CAS NO.79-42-5):
.gif)
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-Mercaptopropionic acid Uses
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.
2-Mercaptopropionic acid Toxicity Data With Reference
| Organism | Test Type | Route | Reported Dose (Normalized Dose) | Effect | Source |
|---|---|---|---|---|---|
| rat | LCLo | inhalation | 700ppm (700ppm) | Kodak Company Reports. Vol. 21MAY1971, |
2-Mercaptopropionic acid Consensus Reports
Reported in EPA TSCA Inventory.
2-Mercaptopropionic acid Safety Profile
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 SOx.
2-Mercaptopropionic acid Standards and Recommendations
DOT Classification: 6.1; Label: Poison
2-Mercaptopropionic acid Specification
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 .
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