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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

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Physical & Chemical properties

Vapour pressure

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Reference
Endpoint:
vapour pressure
Type of information:
migrated information: read-across from supporting substance (structural analogue or surrogate)
Adequacy of study:
key study
Study period:
2009
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Determination has been run according to standardized method but without GLP compliance.
Qualifier:
according to guideline
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
Deviations:
no
GLP compliance:
no
Type of method:
gas saturation method
Temp.:
20 °C
Vapour pressure:
0.002 Pa

The vapour pressure was determined at three different temperatures; 7°, 13° and 19°C, as the test substance has a stated melting point range of 20 -34°C. The flow rate was normally 500 ml/min, but was altered from 250 -1000 ml/min for one temperature. The logarithms of the determined vapour pressures was plotted against the inverted absolute temperature in order to extrapolate the vapour pressure for 20°C.

Conclusions:
The vapour pressure of the test substance was determined to be 1.5 mPa at 20°C.
Executive summary:

Read across. As a worst case, the vapour pressure is read across from a substance with lower carbon chain distribution from the diamine category. Since the vapour pressure increase with decreasing hydrophobe in a specific homologue, it is a worst case to read across from a substance with lower carbon chain distribution. Furthermore, in terms of the hydrophilic group, the vapour pressure is higher over the diamine (not quaternized) that over its quaternized ammonium chloride salt.

The vapour pressure of N-C12,14 alkyl-1,3 -diaminopropane (Diamine C12 -14) (CAS no 90640-43-0) has been determined according to the OECD Guidelines for the Testing of Chemicals, No 104 “Vapour Pressure”, by the gas saturation method. LCMS was used for the quantification.

 

The vapour pressure was determined at three different temperatures; 7°, 13° and 19°C, as the test substance has a stated melting point range of 20 -34°C. The flow rate was normally 500 ml/min, but was altered from 250-1000 ml/min for one temperature. The logarithms of the determined vapour pressures were plotted against the inverted absolute temperature in order to extrapolate the vapour pressure for 20°.

 

The vapour pressure of N-C12,14 alkyl-1,3-diaminopropane was determined to be 1.5 mPa at 20°C.

Description of key information

Read across. The vapour pressure of N-C12,14 alkyl-1,3-diaminopropane was determined to be 1.5 mPa at 20°C.

Key value for chemical safety assessment

Vapour pressure:
0.002 Pa
at the temperature of:
20 °C

Additional information

Read across. As a worst case, the vapour pressure is read across from a substance with lower carbon chain distribution from the diamine category. Since the vapour pressure increase with decreasing hydrophobe in a specific homologue, it is a worst case to read across from a substance with lower carbon chain distribution. Furthermore, in terms of the hydrophilic group, the vapour pressure is higher over the diamine (not quaternized) that over its quaternized ammonium chloride salt.