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CAS Number: 75-33-2
Sum Formula: C3H8S
Molar Mass: 76.2 g/mol
German Synonyms: i-Propylmercaptan | Isopropylmercaptan | 2-Propylmercaptan | 2-Propanthiol
English Synonyms: 2-Propanethiol
EC Number: 200-861-4
Structural Formula 2-Propanethiol

Disclaimer: The CLP/GHS classification is not regularly updated in Chemsafe. For up-to-date information, please use the ECHA database. ( https://echa.europa.eu/en/information-on-chemicals )

GHS Hazard and Category:
  • Flam. Liq. 2: flammable liquids, category 2
GHS Pictogram:
pictogram flammable





GHS Signal Word: Danger
GHS Hazard Statement:
  • H225: Highly flammable liquid and vapour.

Antoine parameters
1 1976 Ohe, S. 6.87718 Torr UTI: 129-2364-31257/0-39
UTI: 129-2364-31257/0-39;
Line no Upper temperature limit of Antoine equation Lower temperature limit of Antoine equation Antoine constant C Antoine constant B Antoine constant A
  • recommended value
  • saturated
  • property of pure substance
  • recommended value
  • saturated
  • property of pure substance
  • recommended value
  • by regression
  • saturated
  • property of pure substance
  • recommended value
  • by regression
  • saturated
  • property of pure substance
  • defined value
  • by regression
  • saturated
  • property of pure substance
1 < 86 °C > 11 °C 226.152 °C 1113.814 °C 6.87718 Torr
Bibliographic data
Title Computer Aided Data Book of Vapor Pressure
Author Ohe, S.
Year 1976
Publisher Data Book Publishing Company;Tokyo(Pub.)
Abstract English Vapor pressure data for about 2000 pure substances are collected and processed by computer and plotted. Antoine constants are evaluated by a least sqare method.
Language JAPN
Boiling point
1 1991 Physikalisch-Technische Bundesanstalt (PTB) 1013.25 hPa 53 °C UTI: 4801-2364-31274/0-39
UTI: 4801-2364-31274/0-39;
Line no Boiling temperature Pressure
  • defined value
  • at atmospheric pressure
  • saturated
  • property of pure substance
  • saturated
1 53 °C 1013.25 hPa
Bibliographic data
Author Physikalisch-Technische Bundesanstalt (PTB)
Year 1991
Title Empfohlene Sicherheitstechnische Kenngrößen
Database PTB
Publisher Datenbank PTB-AG 3.41/3.71
Language GERM
Density
1 1991 Physikalisch-Technische Bundesanstalt (PTB) 1013.25 hPa 20 °C 0.82 g/cm3 UTI: 4801-2364-31275/0-39
UTI: 4801-2364-31275/0-39;
Line no Density Temperature Pressure
  • defined value
  • at atmospheric pressure and room temperature
  • property of pure substance
  • recommended value
  • at atmospheric pressure and room temperature
  • property of pure substance
  • recommended value
  • at atmospheric pressure and room temperature
1 0.82 g/cm3 20 °C 1013.25 hPa
Bibliographic data
Author Physikalisch-Technische Bundesanstalt (PTB)
Year 1991
Title Empfohlene Sicherheitstechnische Kenngrößen
Database PTB
Publisher Datenbank PTB-AG 3.41/3.71
Language GERM
Melting point
1 1991 Physikalisch-Technische Bundesanstalt (PTB) 1013.25 hPa -131 °C UTI: 4801-2364-31273/0-39
UTI: 4801-2364-31273/0-39;
Line no Melting temperature Pressure
  • defined value
  • at atmospheric pressure
  • property of pure substance
  • recommended value
  • at atmospheric pressure
1 -131 °C 1013.25 hPa
Bibliographic data
Author Physikalisch-Technische Bundesanstalt (PTB)
Year 1991
Title Empfohlene Sicherheitstechnische Kenngrößen
Database PTB
Publisher Datenbank PTB-AG 3.41/3.71
Language GERM
Relative gas density
1 1991 Physikalisch-Technische Bundesanstalt (PTB) 2.63 UTI: 4801-2364-31276/0-39
UTI: 4801-2364-31276/0-39;
Line no Relative gas density
  • defined value
  • property of pure substance
1 2.63
Bibliographic data
Author Physikalisch-Technische Bundesanstalt (PTB)
Year 1991
Title Empfohlene Sicherheitstechnische Kenngrößen
Database PTB
Publisher Datenbank PTB-AG 3.41/3.71
Language GERM
Solubility in water
1 2009 Physikalisch-Technische Bundesanstalt (PTB) 25 °C 6.2 g/l UTI: 228-2364-31270/0-39
UTI: 228-2364-31270/0-39;
Line no Solubility in water Temperature
  • defined value
  • estimated
  • property of pure substance
  • property of pure substance
1 6.2 g/l 25 °C
Bibliographic data
Author Physikalisch-Technische Bundesanstalt (PTB)
Year 2009
Title Wasserlöslichkeit
Database PTB
Publisher Datenbank PTB-Lab. 3.43
Language GERM
  • The oxidizing agent is air with an oxygen content of 20.95 % by volume. In the data base it is usually not specified as mixture component. Exceptions are highlighted.
  • Pressure values are absolute, not gauge pressures.
  • Impurities can strongly influence characteristic safety data, particulary if the properties of the impurity considerably deviate from the respective properties of the pure substance.
  • Safety characteristics are only displayed if evaluated data are available.
  • Values can be cited by using the UTI number of the table (Uniform Table Identifier).
  • Color Codes:         recommended value             no recommendation               do not use value

Flash point
1 1991 Physikalisch-Technische Bundesanstalt (PTB) -20 °C UTI: 4801-2364-31277/0-39
UTI: 4801-2364-31277/0-39;
Line no Flash point
  • recommended value
  • estimated
  • closed cup
  • property of pure substance
1 -20 °C
Bibliographic data
Author Physikalisch-Technische Bundesanstalt (PTB)
Year 1991
Title Empfohlene Sicherheitstechnische Kenngrößen
Database PTB
Publisher Datenbank PTB-AG 3.41/3.71
Language GERM
Lower explosion limit
1 1991 Physikalisch-Technische Bundesanstalt (PTB) 1.8 Vol% ± 10 % UTI: 4801-2364-31278/0-39
UTI: 4801-2364-31278/0-39;
Line no Lower explosion limit
  • recommended value
  • estimated
  • property of pure substance
1 1.8 Vol% ± 10 %
2 56 g/m3 ± 10 % ⚠
⚠ The reference for the specification in g/m3 is the molar volume at 20 °C
Bibliographic data
Author Physikalisch-Technische Bundesanstalt (PTB)
Year 1991
Title Empfohlene Sicherheitstechnische Kenngrößen
Database PTB
Publisher Datenbank PTB-AG 3.41/3.71
Language GERM

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