| Record Information |
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| Version | 5.0 |
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| Status | Expected but not Quantified |
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| Creation Date | 2012-09-11 17:43:48 UTC |
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| Update Date | 2023-02-21 17:20:44 UTC |
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| HMDB ID | HMDB0031520 |
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| Secondary Accession Numbers | |
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| Metabolite Identification |
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| Common Name | 2-Mercaptopropanoic acid |
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| Description | 2-Mercaptopropanoic acid, also known as 2-thiolactic acid or 2-thiolactate, belongs to the class of organic compounds known as alpha-mercaptocarboxylic acids. These are carboxylic acids that bear a thiol group at the C-2 position. Alpha-mercaptocarboxylic acids have the general formula RC(S)C(=O)O, where R = H, organyl group. 2-Mercaptopropanoic acid is a meaty, roasted, and sulfurous tasting compound. Based on a literature review a significant number of articles have been published on 2-Mercaptopropanoic acid. |
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| Structure | InChI=1S/C3H6O2S/c1-2(6)3(4)5/h2,6H,1H3,(H,4,5) |
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| Synonyms | | Value | Source |
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| 2-Mercaptopropionic acid | ChEBI | | 2-Thiolactic acid | ChEBI | | 2-Thiolpropionic acid | ChEBI | | alpha-Mercaptopropanoic acid | ChEBI | | alpha-Mercaptopropionic acid | ChEBI | | Thiolactic acid | ChEBI | | 2-Mercaptopropionate | Generator | | 2-Thiolactate | Generator | | 2-Thiolpropionate | Generator | | a-Mercaptopropanoate | Generator | | a-Mercaptopropanoic acid | Generator | | alpha-Mercaptopropanoate | Generator | | Α-mercaptopropanoate | Generator | | Α-mercaptopropanoic acid | Generator | | a-Mercaptopropionate | Generator | | a-Mercaptopropionic acid | Generator | | alpha-Mercaptopropionate | Generator | | Α-mercaptopropionate | Generator | | Α-mercaptopropionic acid | Generator | | Thiolactate | Generator | | 2-Mercaptopropanoate | Generator | | 2-mercapto-Propanoic acid | HMDB | | 2-mercapto-Propionic acid | HMDB | | 2-Sulfanylpropanoic acid | HMDB | | alpha -Mercaptopropanoic acid | HMDB | | alpha -Mercaptopropionic acid | HMDB | | FEMA 3180 | HMDB | | Ammonium thiolactate | MeSH | | Thiolactic acid, (S)-isomer | MeSH | | Thiolactic acid, disilver salt (+1) | MeSH | | Thiolactic acid, monoammonium salt | MeSH | | Thiolactic acid, calcium salt (2:1) | MeSH | | Thiolactic acid, strontium salt (2:1) | MeSH | | Thiolactic acid, (R)-isomer | MeSH | | Thiolactic acid, monolithium salt | MeSH |
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| Chemical Formula | C3H6O2S |
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| Average Molecular Weight | 106.144 |
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| Monoisotopic Molecular Weight | 106.008850126 |
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| IUPAC Name | 2-sulfanylpropanoic acid |
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| Traditional Name | thiolactic acid |
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| CAS Registry Number | 79-42-5 |
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| SMILES | CC(S)C(O)=O |
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| InChI Identifier | InChI=1S/C3H6O2S/c1-2(6)3(4)5/h2,6H,1H3,(H,4,5) |
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| InChI Key | PMNLUUOXGOOLSP-UHFFFAOYSA-N |
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| Chemical Taxonomy |
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| Description | Belongs to the class of organic compounds known as alpha-mercaptocarboxylic acids. These are carboxylic acids that bear a thiol group at the C-2 position. Alpha-mercaptocarboxylic acids have the general formula RC(S)C(=O)O, where R = H, organyl group. |
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| Kingdom | Organic compounds |
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| Super Class | Organic acids and derivatives |
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| Class | Carboxylic acids and derivatives |
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| Sub Class | Carboxylic acids |
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| Direct Parent | alpha-Mercaptocarboxylic acids |
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| Alternative Parents | |
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| Substituents | - 2-mercaptocarboxylic acid
- Monocarboxylic acid or derivatives
- Alkylthiol
- Organic oxygen compound
- Organic oxide
- Hydrocarbon derivative
- Organosulfur compound
- Organooxygen compound
- Carbonyl group
- Aliphatic acyclic compound
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| Molecular Framework | Aliphatic acyclic compounds |
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| External Descriptors | |
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| Ontology |
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| Physiological effect | |
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| Disposition | |
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| Process | Not Available |
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| Role | |
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| Physical Properties |
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| State | Liquid |
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| Experimental Molecular Properties | |
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| Experimental Chromatographic Properties | Not Available |
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| Predicted Molecular Properties | |
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| Predicted Chromatographic Properties | Predicted Collision Cross SectionsPredicted Retention Times Underivatized| Chromatographic Method | Retention Time | Reference |
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| Measured using a Waters Acquity ultraperformance liquid chromatography (UPLC) ethylene-bridged hybrid (BEH) C18 column (100 mm × 2.1 mm; 1.7 μmparticle diameter). Predicted by Afia on May 17, 2022. Predicted by Afia on May 17, 2022. | 1.85 minutes | 32390414 | | Predicted by Siyang on May 30, 2022 | 11.6257 minutes | 33406817 | | Predicted by Siyang using ReTip algorithm on June 8, 2022 | 2.99 minutes | 32390414 | | AjsUoB = Accucore 150 Amide HILIC with 10mM Ammonium Formate, 0.1% Formic Acid | 98.2 seconds | 40023050 | | Fem_Long = Waters ACQUITY UPLC HSS T3 C18 with Water:MeOH and 0.1% Formic Acid | 1635.3 seconds | 40023050 | | Fem_Lipids = Ascentis Express C18 with (60:40 water:ACN):(90:10 IPA:ACN) and 10mM NH4COOH + 0.1% Formic Acid | 439.7 seconds | 40023050 | | Life_Old = Waters ACQUITY UPLC BEH C18 with Water:(20:80 acetone:ACN) and 0.1% Formic Acid | 136.6 seconds | 40023050 | | Life_New = RP Waters ACQUITY UPLC HSS T3 C18 with Water:(30:70 MeOH:ACN) and 0.1% Formic Acid | 307.0 seconds | 40023050 | | RIKEN = Waters ACQUITY UPLC BEH C18 with Water:ACN and 0.1% Formic Acid | 95.3 seconds | 40023050 | | Eawag_XBridgeC18 = XBridge C18 3.5u 2.1x50 mm with Water:MeOH and 0.1% Formic Acid | 380.7 seconds | 40023050 | | BfG_NTS_RP1 =Agilent Zorbax Eclipse Plus C18 (2.1 mm x 150 mm, 3.5 um) with Water:ACN and 0.1% Formic Acid | 525.0 seconds | 40023050 | | HILIC_BDD_2 = Merck SeQuant ZIC-HILIC with ACN(0.1% formic acid):water(16 mM ammonium formate) | 577.0 seconds | 40023050 | | UniToyama_Atlantis = RP Waters Atlantis T3 (2.1 x 150 mm, 5 um) with ACN:Water and 0.1% Formic Acid | 819.7 seconds | 40023050 | | BDD_C18 = Hypersil Gold 1.9µm C18 with Water:ACN and 0.1% Formic Acid | 274.7 seconds | 40023050 | | UFZ_Phenomenex = Kinetex Core-Shell C18 2.6 um, 3.0 x 100 mm, Phenomenex with Water:MeOH and 0.1% Formic Acid | 1099.6 seconds | 40023050 | | SNU_RIKEN_POS = Waters ACQUITY UPLC BEH C18 with Water:ACN and 0.1% Formic Acid | 312.3 seconds | 40023050 | | RPMMFDA = Waters ACQUITY UPLC BEH C18 with Water:ACN and 0.1% Formic Acid | 329.1 seconds | 40023050 | | MTBLS87 = Merck SeQuant ZIC-pHILIC column with ACN:Water and :ammonium carbonate | 723.7 seconds | 40023050 | | KI_GIAR_zic_HILIC_pH2_7 = Merck SeQuant ZIC-HILIC with ACN:Water and 0.1% FA | 350.2 seconds | 40023050 | | Meister zic-pHILIC pH9.3 = Merck SeQuant ZIC-pHILIC column with ACN:Water 5mM NH4Ac pH9.3 and 5mM ammonium acetate in water | 258.4 seconds | 40023050 |
Predicted Kovats Retention IndicesUnderivatizedDerivatized| Derivative Name / Structure | SMILES | Kovats RI Value | Column Type | Reference |
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| 2-Mercaptopropanoic acid,1TMS,isomer #1 | CC(S)C(=O)O[Si](C)(C)C | 975.5 | Semi standard non polar | 33892256 | | 2-Mercaptopropanoic acid,1TMS,isomer #2 | CC(S[Si](C)(C)C)C(=O)O | 1146.2 | Semi standard non polar | 33892256 | | 2-Mercaptopropanoic acid,2TMS,isomer #1 | CC(S[Si](C)(C)C)C(=O)O[Si](C)(C)C | 1218.2 | Semi standard non polar | 33892256 | | 2-Mercaptopropanoic acid,2TMS,isomer #1 | CC(S[Si](C)(C)C)C(=O)O[Si](C)(C)C | 1171.4 | Standard non polar | 33892256 | | 2-Mercaptopropanoic acid,1TBDMS,isomer #1 | CC(S)C(=O)O[Si](C)(C)C(C)(C)C | 1214.1 | Semi standard non polar | 33892256 | | 2-Mercaptopropanoic acid,1TBDMS,isomer #2 | CC(S[Si](C)(C)C(C)(C)C)C(=O)O | 1397.2 | Semi standard non polar | 33892256 | | 2-Mercaptopropanoic acid,2TBDMS,isomer #1 | CC(S[Si](C)(C)C(C)(C)C)C(=O)O[Si](C)(C)C(C)(C)C | 1647.3 | Semi standard non polar | 33892256 | | 2-Mercaptopropanoic acid,2TBDMS,isomer #1 | CC(S[Si](C)(C)C(C)(C)C)C(=O)O[Si](C)(C)C(C)(C)C | 1621.7 | Standard non polar | 33892256 |
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| GC-MS Spectra| Spectrum Type | Description | Splash Key | Deposition Date | Source | View |
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| Predicted GC-MS | Predicted GC-MS Spectrum - 2-Mercaptopropanoic acid GC-MS (Non-derivatized) - 70eV, Positive | splash10-08ou-9100000000-1ddf1e7864794c2a9d67 | 2017-09-01 | Wishart Lab | View Spectrum | | Predicted GC-MS | Predicted GC-MS Spectrum - 2-Mercaptopropanoic acid GC-MS (1 TMS) - 70eV, Positive | splash10-024r-9300000000-c8b327dd622ce8610af7 | 2017-10-06 | Wishart Lab | View Spectrum | | Predicted GC-MS | Predicted GC-MS Spectrum - 2-Mercaptopropanoic acid GC-MS (Non-derivatized) - 70eV, Positive | Not Available | 2021-10-12 | Wishart Lab | View Spectrum |
MS/MS Spectra| Spectrum Type | Description | Splash Key | Deposition Date | Source | View |
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| Predicted LC-MS/MS | Predicted LC-MS/MS Spectrum - 2-Mercaptopropanoic acid 10V, Positive-QTOF | splash10-000i-9200000000-8e01a7bcebf854db93b8 | 2015-04-24 | Wishart Lab | View Spectrum | | Predicted LC-MS/MS | Predicted LC-MS/MS Spectrum - 2-Mercaptopropanoic acid 20V, Positive-QTOF | splash10-08g0-9100000000-6a8bb0d8374bd2086a27 | 2015-04-24 | Wishart Lab | View Spectrum | | Predicted LC-MS/MS | Predicted LC-MS/MS Spectrum - 2-Mercaptopropanoic acid 40V, Positive-QTOF | splash10-0a4r-9000000000-32e7619d6cd6cc5ac61e | 2015-04-24 | Wishart Lab | View Spectrum | | Predicted LC-MS/MS | Predicted LC-MS/MS Spectrum - 2-Mercaptopropanoic acid 10V, Negative-QTOF | splash10-0a4i-6900000000-82a7fd269418d8e68299 | 2015-04-25 | Wishart Lab | View Spectrum | | Predicted LC-MS/MS | Predicted LC-MS/MS Spectrum - 2-Mercaptopropanoic acid 20V, Negative-QTOF | splash10-052r-9300000000-05b84a2072b802d6d685 | 2015-04-25 | Wishart Lab | View Spectrum | | Predicted LC-MS/MS | Predicted LC-MS/MS Spectrum - 2-Mercaptopropanoic acid 40V, Negative-QTOF | splash10-0fer-9000000000-54b8055a55c3e7f9c304 | 2015-04-25 | Wishart Lab | View Spectrum | | Predicted LC-MS/MS | Predicted LC-MS/MS Spectrum - 2-Mercaptopropanoic acid 10V, Positive-QTOF | splash10-06ri-9300000000-6c6126220fa27a3b87f2 | 2021-09-22 | Wishart Lab | View Spectrum | | Predicted LC-MS/MS | Predicted LC-MS/MS Spectrum - 2-Mercaptopropanoic acid 20V, Positive-QTOF | splash10-03di-9000000000-ff9c437be9955d96c16e | 2021-09-22 | Wishart Lab | View Spectrum | | Predicted LC-MS/MS | Predicted LC-MS/MS Spectrum - 2-Mercaptopropanoic acid 40V, Positive-QTOF | splash10-03di-9000000000-837019e0985800dc60db | 2021-09-22 | Wishart Lab | View Spectrum | | Predicted LC-MS/MS | Predicted LC-MS/MS Spectrum - 2-Mercaptopropanoic acid 10V, Negative-QTOF | splash10-0a4i-2900000000-df5a3761ea71e7c2a207 | 2021-09-22 | Wishart Lab | View Spectrum | | Predicted LC-MS/MS | Predicted LC-MS/MS Spectrum - 2-Mercaptopropanoic acid 20V, Negative-QTOF | splash10-053r-9100000000-6fefeb2e7bef315a22de | 2021-09-22 | Wishart Lab | View Spectrum | | Predicted LC-MS/MS | Predicted LC-MS/MS Spectrum - 2-Mercaptopropanoic acid 40V, Negative-QTOF | splash10-001i-9000000000-6f2915ed00c7319209c6 | 2021-09-22 | Wishart Lab | View Spectrum |
NMR Spectra| Spectrum Type | Description | Deposition Date | Source | View |
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| Predicted 1D NMR | 13C NMR Spectrum (1D, 100 MHz, D2O, predicted) | 2021-09-16 | Wishart Lab | View Spectrum | | Predicted 1D NMR | 1H NMR Spectrum (1D, 100 MHz, D2O, predicted) | 2021-09-16 | Wishart Lab | View Spectrum | | Predicted 1D NMR | 13C NMR Spectrum (1D, 200 MHz, D2O, predicted) | 2021-09-16 | Wishart Lab | View Spectrum | | Predicted 1D NMR | 1H NMR Spectrum (1D, 200 MHz, D2O, predicted) | 2021-09-16 | Wishart Lab | View Spectrum | | Predicted 1D NMR | 13C NMR Spectrum (1D, 300 MHz, D2O, predicted) | 2021-09-16 | Wishart Lab | View Spectrum | | Predicted 1D NMR | 1H NMR Spectrum (1D, 300 MHz, D2O, predicted) | 2021-09-16 | Wishart Lab | View Spectrum | | Predicted 1D NMR | 13C NMR Spectrum (1D, 400 MHz, D2O, predicted) | 2021-09-16 | Wishart Lab | View Spectrum | | Predicted 1D NMR | 1H NMR Spectrum (1D, 400 MHz, D2O, predicted) | 2021-09-16 | Wishart Lab | View Spectrum | | Predicted 1D NMR | 13C NMR Spectrum (1D, 500 MHz, D2O, predicted) | 2021-09-16 | Wishart Lab | View Spectrum | | Predicted 1D NMR | 1H NMR Spectrum (1D, 500 MHz, D2O, predicted) | 2021-09-16 | Wishart Lab | View Spectrum | | Predicted 1D NMR | 13C NMR Spectrum (1D, 600 MHz, D2O, predicted) | 2021-09-16 | Wishart Lab | View Spectrum | | Predicted 1D NMR | 1H NMR Spectrum (1D, 600 MHz, D2O, predicted) | 2021-09-16 | Wishart Lab | View Spectrum | | Predicted 1D NMR | 13C NMR Spectrum (1D, 700 MHz, D2O, predicted) | 2021-09-16 | Wishart Lab | View Spectrum | | Predicted 1D NMR | 1H NMR Spectrum (1D, 700 MHz, D2O, predicted) | 2021-09-16 | Wishart Lab | View Spectrum | | Predicted 1D NMR | 13C NMR Spectrum (1D, 800 MHz, D2O, predicted) | 2021-09-16 | Wishart Lab | View Spectrum | | Predicted 1D NMR | 1H NMR Spectrum (1D, 800 MHz, D2O, predicted) | 2021-09-16 | Wishart Lab | View Spectrum | | Predicted 1D NMR | 13C NMR Spectrum (1D, 900 MHz, D2O, predicted) | 2021-09-16 | Wishart Lab | View Spectrum | | Predicted 1D NMR | 1H NMR Spectrum (1D, 900 MHz, D2O, predicted) | 2021-09-16 | Wishart Lab | View Spectrum | | Predicted 1D NMR | 13C NMR Spectrum (1D, 1000 MHz, D2O, predicted) | 2021-09-16 | Wishart Lab | View Spectrum | | Predicted 1D NMR | 1H NMR Spectrum (1D, 1000 MHz, D2O, predicted) | 2021-09-16 | Wishart Lab | View Spectrum |
IR Spectra| Spectrum Type | Description | Deposition Date | Source | View |
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| Predicted IR Spectrum | IR Ion Spectrum (Predicted IRIS Spectrum, Adduct: [M-H]-) | 2023-02-04 | FELIX lab | View Spectrum | | Predicted IR Spectrum | IR Ion Spectrum (Predicted IRIS Spectrum, Adduct: [M+H]+) | 2023-02-04 | FELIX lab | View Spectrum | | Predicted IR Spectrum | IR Ion Spectrum (Predicted IRIS Spectrum, Adduct: [M+Na]+) | 2023-02-04 | FELIX lab | View Spectrum |
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