2-mercaptopropanoicacid
2-Mercaptopropionic acid
CAS: 79-42-5
Molecular Formula: C3H6O2S
2-mercaptopropanoicacid - Names and Identifiers
| Name | 2-Mercaptopropionic acid |
| Synonyms | Thiolacticacid THIOLACTIC ACID Thiolactic acid 2-Mercaptopropanic Acid 2-mercaptopropanoicacid 2-mercapto-propanoicaci α-Mercaptopropanoic acid 2-Mercaptopropionic acid 2-sulfanylpropanoic acid (2S)-2-sulfanylpropanoate (2R)-2-sulfanylpropanoate 2-Mercapto Propionic Acid PROPANOIC ACID, 2-MERCAPTO- 2-hydroxypropanethioic S-acid (2S)-2-sulfanylpropanoic acid |
| CAS | 79-42-5 |
| EINECS | 201-206-5 |
| InChI | InChI=1/C3H6O2S/c1-2(6)3(4)5/h2,6H,1H3,(H,4,5)/p-1/t2-/m1/s1 |
| InChIKey | PMNLUUOXGOOLSP-UHFFFAOYSA-N |
2-mercaptopropanoicacid - Physico-chemical Properties
| Molecular Formula | C3H6O2S |
| Molar Mass | 106.14 |
| Density | 1.196 g/mL at 25 °C (lit.) |
| Melting Point | 10-14 °C (lit.) |
| Boling Point | 102 °C/16 mmHg (lit.)203-208 °C (lit.) |
| Flash Point | 190°F |
| JECFA Number | 551 |
| Water Solubility | MISCIBLE |
| Solubility | Can be miscible with water, alcohol and ether. |
| Vapor Presure | 1.7 hPa (20 °C) |
| Appearance | Transparent liquid |
| Color | Clear colorless to slightly yellow |
| Merck | 14,9340 |
| BRN | 506218 |
| pKa | pK1:4.32(0);pK2:10.20(SH) (25°C) |
| PH | 2 (H2O, 20℃)(undiluted) |
| Storage Condition | 2-8°C |
| Sensitive | Sensitive to air and easy to absorb moisture |
| Refractive Index | n20/D 1.481(lit.) |
| MDL | MFCD00004897 |
| Physical and Chemical Properties | Colorless to light yellow liquid. Roasted meat was aromatic. Miscible in water, ethanol, ether and acetone. Boiling point 117 C (2133Pa). |
| Use | A compound suitable for amino acid analysis by means of OPA |
2-mercaptopropanoicacid - Risk and Safety
| Hazard Symbols | C - Corrosive |
| Risk Codes | R34 - Causes burns R22 - Harmful if swallowed |
| Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36/37/39 - Wear suitable protective clothing, gloves and eye/face protection. S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) S25 - Avoid contact with eyes. |
| UN IDs | UN 2936 6.1/PG 2 |
| WGK Germany | 1 |
| RTECS | UF5250000 |
| TSCA | Yes |
| HS Code | 29309070 |
| Hazard Class | 6.1 |
| Packing Group | II |
| Toxicity | LD50 orally in Rabbit: 730 mg/kg |
2-mercaptopropanoicacid - Reference
| Reference Show more | 1. [IF=3.239] Gang Luo et al."The mechanism of N-acetyl-l-cysteine in improving the secretion of porcine follicle-stimulating hormone in Pichia pastoris."Yeast. 2021 Nov;38(11):601-611 |
2-mercaptopropanoicacid - Nature
Open Data Verified Data
oily liquid with unpleasant odor. Upon cold solidification, the crystals have a melting point of <10 °c. Relative density 1 · 220. Boiling point of 117 deg C (2.133kPa). Refractive index 4823. It can be miscible with water, ethanol, ether and acetone, and can form salts with metals.
Last Update：2024-01-02 23:10:35
2-mercaptopropanoicacid - Preparation Method
Open Data Verified Data
- using thiourea as raw material, first react with hydrochloric acid at 40 ℃, then add acrylonitrile Dropwise, and then heat up to 90-100 ℃, then react to obtain thiourea amino acetonitrile, then the D-methionine in DL-methionine at 40 ℃ is added to pH 11 when NaOH is available in the animal body. After removing ammonia, it is neutralized with hydrochloric acid at 30 ℃, and finally extracted with benzene, after benzene was distilled off, 125 to 140 ° C. Was collected by distillation under reduced pressure (2. 1331kPa) fraction, that is, the mercaptopropionic acid.
- with 2 chlorine propionic acid as raw material, and the role of potassium hydrogen sulfide derived.
Last Update：2022-01-01 10:37:53
2-mercaptopropanoicacid - Introduction
Used as antioxidant, catalyst and biochemical reagent. High-speed RP-HPLC/FC analysis of amino acids.
Last Update：2022-10-16 17:28:55
2-mercaptopropanoicacid - Use
Open Data Verified Data
It is used as an intermediate for the medicine fennerol.
Last Update：2022-01-01 10:37:52
2-mercaptopropanoicacid - Safety
Open Data Verified Data
This product is toxic. See thioglycolic acid.
Last Update：2022-01-01 10:37:53
2-mercaptopropanoicacid - Reference Information
| FEMA | 3180 | 2-MERCAPTOPROPIONIC ACID |
| LogP | 1.15 at 20℃ |
| NIST chemical information | information provided by: webbook.nist.gov (external link) |
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| content analysis | accurately weigh about 1g of the sample and move it into a ML Erlenmeyer flask containing 75ml of water, phenolphthalein indicator (TS-167) was added and titrated with 0.5 mol/L NaOH solution, corresponding to 0.5 mg 2-mercaptopropionic acid per mL of 53.08 mol/L NaOH solution. |
| toxicity | GRAS(FEMA). |
| usage limit | FEMA: 50.0mg/kg for meat, sausage and broth. |
| Use | GB 2760-1996 specifies temporary use of flavorants. |
| production method | The lactic acid ester is refluxed with thiourea-hydrobromic acid, and then hydrolyzed with sodium hydroxide and acidified. |
| category | toxic substances |
| toxicity grade | high toxicity |
| Acute toxicity | oral-rat LD50: 244 mg/kg; Oral-mouse LD50: 190 mg/kg |
| stimulation data | Skin-rabbits 10 mg/24 h severe; eye-rabbit 2 mg severe |
| flammability hazard characteristics | flammable; Thermally decomposed toxic sulfur oxide gas |
| storage and transportation characteristics | The warehouse is ventilated and dried at low temperature; It is stored and transported separately from oxidant and food |
| extinguishing agent | water, carbon dioxide, dry powder, sand |
| Occupational Standard | sel 1 mg/m3 |
Last Update：2024-04-09 02:00:11
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