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Vapour pressure

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vapour pressure
Type of information:
experimental study
Adequacy of study:
key study
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
according to guideline
OECD Guideline 104 (Vapour Pressure Curve)
Version / remarks:
The modification being that a direct reading MKS Baritron Capacitance Manometer Model 628C was substituted for the mercury manometer in the method.
GLP compliance:
Intertek has been evaluated against Standard ISO/IEC 17025:2005 General Requirements for the Competence of Testing and Calibration Laboratories, and currently maintains accreditation from the A2LA (Certificate No. 3287.01
Other quality assurance:
ISO/IEC 17025 (General requirements for the competence of testing and calibration laboratories)
Type of method:
static method
Specific details on test material used for the study:
Chemical Name Cetyl Betaine
Physical State liquid
CAS # 693-33-4
EU # 211-748-4
Sample ID 53841K16
Manufacturer DeForest
Received on November 22, 2016
Tested on January 30, 2017
Key result
Test no.:
10 °C
Vapour pressure:
693.2 Pa
Key result
Test no.:
21.1 °C
Vapour pressure:
1 319.7 Pa
Key result
Test no.:
50 °C
Vapour pressure:
5 078.7 Pa
Key result
Test no.:
80 °C
Vapour pressure:
20 141.6 Pa

Description of key information

The vapour pressure of the dried solid was measured over a range of temperatures from 10C to 80C.

During the test, data were collected at one point per min. The last 10 to 20 measurements per temperature were averaged to obtain the vapor pressure at each temp. All bath temperature settings were set using the NIST traceable thermometer. The value at 21C has been selected as being most representative of the vapour pressue under normal conditions.

Key value for chemical safety assessment

Vapour pressure:
1 319.7 Pa
at the temperature of:
21.1 °C

Additional information