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CAS Number: 109-99-9

Sum Formula: C4H8O

Molar Mass: 72.1 g/mol

German Synonyms: Diethylenmonoxid | Tetrahydrofuran

English Synonyms: Tetrahydrofurane | Tetrahydrofuran

EC Index Number: 603-025-00-0

EC Number: 203-726-8

Temperature Class: T3

Explosion Group: IIB

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
Eye Irrit. 2: eye irritation, category 2
STOT SE 3: Specific target organ toxicity following single exposure, category 3, respiratory tract irritation or narcotic effects

GHS Pictogram:

GHS Signal Word: Danger

GHS Hazard Statement:

H225: Highly flammable liquid and vapour.
H319: Causes serious eye irritation.
H335: May cause respiratory irritation.
EUH019: May form explosive peroxides.

Antoine parameters

1973

Boublik, T.; Fried, V.; Hala, E.

6.99515 Torr

UTI: 128-1183-19085/0-39

UTI: 128-1183-19085/0-39;
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	< 100 °C	> 23 °C	226.254 °C	1202.29 °C	6.99515 Torr

Bibliographic data

Title	The Vapour Pressures of Pure Substances
Author	Boublik, T.; Fried, V.; Hala, E.
Year	1973
Publisher	Elsevier Scientific Publishing Company;Amsterdam,
Abstract English	Selected values of the temperature dependence of the vapor pres- sures of some pure substances in the normal and low pressure region
Language	ENGL

Boiling point

1963

Nabert, K.; Schön, G.

1013.25 hPa

64 °C

UTI: 1000-1183-19106/0-39

UTI: 1000-1183-19106/0-39;
Line no	Boiling temperature	Pressure
	defined value at atmospheric pressure property of pure substance
1	64 °C	1013.25 hPa

Bibliographic data

Author	Nabert, K.; Schön, G.
Year	1963
Title	Sicherheitstechnische Kennzahlen brennbarer Gase und Dämpfe (mit 6. Nachtrag)
Publisher	Deutscher Eichverlag
Publisher City	Braunschweig
Abstract English	Safety values of about 1000 flammable gases and vapors: Explosion limits, ignition temperatures, flash points, explosion pressures.
Language	GERM

Density

1963

Nabert, K.; Schön, G.

1013.25 hPa

20 °C

0.89 g/cm³

UTI: 1000-1183-19107/0-39

UTI: 1000-1183-19107/0-39;
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	0.89 g/cm³	20 °C	1013.25 hPa

Bibliographic data

Author	Nabert, K.; Schön, G.
Year	1963
Title	Sicherheitstechnische Kennzahlen brennbarer Gase und Dämpfe (mit 6. Nachtrag)
Publisher	Deutscher Eichverlag
Publisher City	Braunschweig
Abstract English	Safety values of about 1000 flammable gases and vapors: Explosion limits, ignition temperatures, flash points, explosion pressures.
Language	GERM

Melting point

1963

Nabert, K.; Schön, G.

1013.25 hPa

-108 °C

UTI: 1000-1183-19110/0-39

UTI: 1000-1183-19110/0-39;
Line no	Melting temperature	Pressure
	defined value at atmospheric pressure saturated property of pure substance	recommended value at atmospheric pressure saturated
1	-108 °C	1013.25 hPa

Bibliographic data

Author	Nabert, K.; Schön, G.
Year	1963
Title	Sicherheitstechnische Kennzahlen brennbarer Gase und Dämpfe (mit 6. Nachtrag)
Publisher	Deutscher Eichverlag
Publisher City	Braunschweig
Abstract English	Safety values of about 1000 flammable gases and vapors: Explosion limits, ignition temperatures, flash points, explosion pressures.
Language	GERM

Relative gas density

1963

Nabert, K.; Schön, G.

2.49

UTI: 1000-1183-19108/0-39

UTI: 1000-1183-19108/0-39;
Line no	Relative gas density
	defined value property of pure substance
1	2.49

Bibliographic data

Author	Nabert, K.; Schön, G.
Year	1963
Title	Sicherheitstechnische Kennzahlen brennbarer Gase und Dämpfe (mit 6. Nachtrag)
Publisher	Deutscher Eichverlag
Publisher City	Braunschweig
Abstract English	Safety values of about 1000 flammable gases and vapors: Explosion limits, ignition temperatures, flash points, explosion pressures.
Language	GERM

Solubility in water

2009

Physikalisch-Technische Bundesanstalt (PTB)

25 °C

300 g/l

UTI: 228-1183-19103/0-39

UTI: 228-1183-19103/0-39;
Line no	Solubility in water	Temperature
	defined value property of pure substance	property of pure substance
1	300 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

Autoignition Temperature

1963

Nabert, K.; Schön, G.

230 °C

UTI: 1000-1183-19109/0-39

UTI: 1000-1183-19109/0-39;
Line no	Autoignition Temperature
	recommended value according to german standard property of pure substance
1	230 °C [A]

[A] DIN 51794: Testing of mineral oil hydrocarbons - Determination of ignition temperature; measurements are technically identical to those of ISO/IEC 80079-20-1 but results are treated differently.

Bibliographic data

Author	Nabert, K.; Schön, G.
Year	1963
Title	Sicherheitstechnische Kennzahlen brennbarer Gase und Dämpfe (mit 6. Nachtrag)
Publisher	Deutscher Eichverlag
Publisher City	Braunschweig
Abstract English	Safety values of about 1000 flammable gases and vapors: Explosion limits, ignition temperatures, flash points, explosion pressures.
Language	GERM

Flash point

1963

Nabert, K.; Schön, G.

-20 °C

UTI: 1000-1183-19104/0-39

UTI: 1000-1183-19104/0-39;
Line no	Flash point
	recommended value experimental closed cup property of pure substance
1	-20 °C

Bibliographic data

Author	Nabert, K.; Schön, G.
Year	1963
Title	Sicherheitstechnische Kennzahlen brennbarer Gase und Dämpfe (mit 6. Nachtrag)
Publisher	Deutscher Eichverlag
Publisher City	Braunschweig
Abstract English	Safety values of about 1000 flammable gases and vapors: Explosion limits, ignition temperatures, flash points, explosion pressures.
Language	GERM

Explosion limits

Lower explosion limit

Lower Explosion Limit as a function of temperature (DIN EN 1839-T)

2006

Physikalisch-Technische Bundesanstalt (PTB)

100 °C ... 180 °C

0.9 Vol% ... 1.2 Vol%

UTI: 4026-1183-19116/0-39

Lower Explosion Limit as a function of temperature (DIN EN 1839-T)
UTI: 4026-1183-19116/0-39;
Line no	Temperature	Lower explosion limit
	experimental property of pure substance	recommended value experimental at atmospheric pressure property of pure substance
1	100 °C	1.2 Vol%
2	150 °C	1 Vol%
3	180 °C	0.9 Vol%

Bibliographic data

Author	Physikalisch-Technische Bundesanstalt (PTB)
Year	2006
Title	Sicherheitstechnische Kenngrößen: Messwerte 2006 des PTB-Laboratoriums 3.41
Database	PTB
Publisher	PTB-Lab. 3.41
Language	GERM

1963

Nabert, K.; Schön, G.

1.5 Vol% ± 10 %

UTI: 1000-1183-19111/0-39

UTI: 1000-1183-19111/0-39;
Line no	Lower explosion limit
	recommended value property of pure substance
1	1.5 Vol% ± 10 %
2	46 g/m³ ± 10 % ⚠

⚠ The reference for the specification in g/m³ is the molar volume at 20 °C

Bibliographic data

Author	Nabert, K.; Schön, G.
Year	1963
Title	Sicherheitstechnische Kennzahlen brennbarer Gase und Dämpfe (mit 6. Nachtrag)
Publisher	Deutscher Eichverlag
Publisher City	Braunschweig
Abstract English	Safety values of about 1000 flammable gases and vapors: Explosion limits, ignition temperatures, flash points, explosion pressures.
Language	GERM

Upper explosion limit

Upper Explosion Limit as a function of pressure and temperature (9-l-autoclave)

2013

Physikalisch-Technische Bundesanstalt (PTB)

4 bar ... 10 bar

100 °C ... 150 °C

25.7 Vol% ... 51 Vol%

UTI: 4033-1183-19117/0-39

Upper Explosion Limit as a function of pressure and temperature (9-l-autoclave)
UTI: 4033-1183-19117/0-39;
Line no	Temperature	Pressure	Upper explosion limit
	property of pure substance		recommended value experimental property of pure substance
1	100 °C	4 bar	25.7 Vol%
2	150 °C	4 bar	32.4 Vol%
3	150 °C	10 bar	51 Vol%

Bibliographic data

Author	Physikalisch-Technische Bundesanstalt (PTB)
Year	2013
Title	Sicherheitstechnische Kenngrößen: Messwerte 2013 des PTB-Laboratoriums 3.71
Database	PTB
Publisher	PTB-Lab. 3.71
Language	GERM

1963

Nabert, K.; Schön, G.

12.4 Vol% ± 5 %

UTI: 1000-1183-19112/0-39

UTI: 1000-1183-19112/0-39;
Line no	Upper explosion limit
	recommended value property of pure substance
1	12.4 Vol% ± 5 %
2	370 g/m³ ± 5 % ⚠

⚠ The reference for the specification in g/m³ is the molar volume at 20 °C

Bibliographic data

Author	Nabert, K.; Schön, G.
Year	1963
Title	Sicherheitstechnische Kennzahlen brennbarer Gase und Dämpfe (mit 6. Nachtrag)
Publisher	Deutscher Eichverlag
Publisher City	Braunschweig
Abstract English	Safety values of about 1000 flammable gases and vapors: Explosion limits, ignition temperatures, flash points, explosion pressures.
Language	GERM

Upper Explosion Limit as a function of temperature (DIN EN 1839-T)

2006

Physikalisch-Technische Bundesanstalt (PTB)

100 °C ... 180 °C

13.1 Vol% ... 15.3 Vol%

UTI: 4026-1183-19115/0-39

Upper Explosion Limit as a function of temperature (DIN EN 1839-T)
UTI: 4026-1183-19115/0-39;
Line no	Temperature	Upper explosion limit
	experimental property of pure substance	recommended value experimental at atmospheric pressure property of pure substance
1	100 °C	13.1 Vol%
2	150 °C	14.3 Vol%
3	180 °C	15.3 Vol%

Bibliographic data

Author	Physikalisch-Technische Bundesanstalt (PTB)
Year	2006
Title	Sicherheitstechnische Kenngrößen: Messwerte 2006 des PTB-Laboratoriums 3.41
Database	PTB
Publisher	PTB-Lab. 3.41
Language	GERM

Lower explosion point

1986

Yagyu, S.

-23 °C

UTI: 200-1183-19088/0-39

UTI: 200-1183-19088/0-39;
Line no	Lower explosion point
	recommended value experimental property of pure substance
1	-23 °C

Bibliographic data

Title	Diagrams Related to Flashing Temperatures and Flammability Limits
Author	Yagyu, S.
Year	1986
Journal Title	Safety Document of the Research Institute of Indus
Volume	25
Publisher	RIIS
Language	JAPN

Maximum experimental safe gap

2016

Physikalisch-Technische Bundesanstalt (PTB), Arbeitsgruppe 3.71

0.83 mm

UTI: 4038-1183-60253/20240805-39

UTI: 4038-1183-60253/20240805-39;
Line no	Maximum experimental safe gap
	recommended value international standard method
1	0.83 mm [A]

[A] IEC 60079-20-1: Explosive atmospheres - Part 20-1: Material characteristics for gas and vapour classification - Test methods and data; Replaced by ISO/IEC 80079-20-1 in 2017

Bibliographic data

Author	Physikalisch-Technische Bundesanstalt (PTB), Arbeitsgruppe 3.71
Year	2016
Title	Sicherheitstechnische Kenngrößen: Messwerte des Labors
Database	PTB
Publisher	PTB-Lab. 3.71
Language	GERM

1992

Nabert, K.; Schön, G.; Redeker, T.

0.87 mm

UTI: 1050-1183-19113/0-39

UTI: 1050-1183-19113/0-39;
Line no	Maximum experimental safe gap
	property of pure substance
1	0.87 mm

Bibliographic data

Author	Nabert, K.; Schön, G.; Redeker, T.
Year	1992
Title	Sicherheitstechnische Kenngrößen brennbarer Gase und Dämpfe
Publisher	Deutscher Eichverlag
Publisher City	Braunschweig
Language	GERM

Stoichiometric fraction of combustible substance in mixture with air

2005

Physikalisch-Technische Bundesanstalt (PTB)

3.7 Mol%

UTI: 220-1183-19102/0-39

UTI: 220-1183-19102/0-39;
Line no	Stoichiometric fraction of combustible substance in mixture with air
	recommended value property of pure substance
1	3.7 Mol%

Bibliographic data

Author	Physikalisch-Technische Bundesanstalt (PTB)
Year	2005
Title	Berechnete molare stöchiometrische Brenngasanteile in Luft (c_stoech)
Database	PTB
Publisher	Datenbank PTB-Lab. 3.43
Language	GERM

Stoichiometric fraction of combustible substance in mixture with oxygen

2005

Physikalisch-Technische Bundesanstalt (PTB)

15.4 Mol%

UTI: 219-1183-19101/0-39

UTI: 219-1183-19101/0-39;
Line no	Stoichiometric fraction of combustible substance in mixture with oxygen
	recommended value property of pure substance
1	15.4 Mol%

Bibliographic data

Author	Physikalisch-Technische Bundesanstalt (PTB)
Year	2005
Title	Berechnete molare stöchiometrische Brenngasanteile in Sauerstoff
Database	PTB
Publisher	Datenbank PTB-Lab. 3.43
Language	GERM

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Tetrahydrofuran

Classification

Physico-Chemical Data

Safety Characteristics of Substance

Safety Characteristics of Substance Mixtures

Air, Nitrogen, Tetrahydrofuran (Tetrahydrofuran/nitrogen/air mixture)

Air, Dodecane, Tetrahydrofuran (Tetrahydrofuran/n-dodecane mixture)

Dinitrogen oxide, Tetrahydrofuran (Tetrahydrofuran/dinitrogen oxide mixture)

Oxygen, Tetrahydrofuran (Tetrahydrofuran/oxygen mixture)