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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Physical & Chemical properties

Surface tension

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Endpoint:
surface tension
Type of information:
read-across from supporting substance (structural analogue or surrogate)
Adequacy of study:
key study
Study period:
Up to 2008
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Source is a published handbook, no data on GLP/guideline compliance/method. Acceptable with restriction as handbook is peer reviewed and considered a reliable source.
Justification for type of information:
A discussion and report on the read across strategy is given as an attachment in IUCLID Section 13.
Reason / purpose for cross-reference:
read-across: supporting information
Principles of method if other than guideline:
The use of secondary sources of data is acceptable when they are based on a critical evaluation of peer-reviewed data and a consequent selection of a reliable and representative value for the property under investigation. The introduction to the CRC Handbook of Chemistry and Physics states that data for physical constants have been taken from many sources, including both compilations and the primary literature. Where conflicts were found, the value deemed most reliable was chosen. Therefore, although the method used is not known, the values presented here are acceptable as they are from a reliable secondary source of phys chem. data.
GLP compliance:
not specified
Remarks:
Not reported
Type of method:
other: Not reported
Key result
Surface tension:
15.49 mN/m
Temp.:
25 °C
Conc.:
100 vol%
Conclusions:
The surface tension of 2-methylbutane has been read across within the category from n-pentane and was reported as 15.49 mN/m at 25°C.
Executive summary:

The surface tension of 2 -methylbutane has been read across within the category from n-pentane. There is no available information on the methods used to determine the value for this endpoint. However, this information is taken from the CRC Handbook which is considered to be a reliable peer reviewed handbook and suitable for use as the key study for this endpoint. The surface tension of n-pentane is therefore 15.49 mN/m at 25°C.

Endpoint:
surface tension
Data waiving:
study scientifically not necessary / other information available
Justification for data waiving:
the study does not need to be conducted because based on structure, surface activity is not expected or cannot be predicted
the study does not need to be conducted because surface activity is not a desired property of the material

Description of key information

The surface tension is between 13.7 and 16 mN/m at 25°C for 2-methylbutane, based on Wilhelmy plate methodology.

Key value for chemical safety assessment

Additional information

The surface tension is between 13.7 and 16 mN/m at 25°C for 2-methylbutane based on Wilhelmy plate methodology. This range has been agreed by the consortium to represent the substance. This is supported by read across from within the category from n-pentane. The n-pentane range of 13 -17 mN/m at 25°C is taken from the CRC Handbook (Lide 2008). There is no information available on the methods used to determine the value for this endpoint. However, the CRC Handbook is considered to be a reliable, peer-reviewed handbook and suitable for use as a study for this endpoint.