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Physical & Chemical properties

Vapour pressure

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Endpoint:
vapour pressure
Type of information:
migrated information: read-across from supporting substance (structural analogue or surrogate)
Adequacy of study:
weight of evidence
Reliability:
3 (not reliable)
Rationale for reliability incl. deficiencies:
other: no method provided
Guideline:
other: no guideline reported
Temp.:
77 °F
Vapour pressure:
0.03 mm Hg
Remarks on result:
other: equals 4.0 Pa @25°C
Conclusions:
The vapour pressure of m-xylylendiamine has been reported as 0.03 mmHg at 77F, equals 4.0 Pa at 25°C.
Endpoint:
vapour pressure
Type of information:
migrated information: read-across from supporting substance (structural analogue or surrogate)
Adequacy of study:
weight of evidence
Reliability:
2 (reliable with restrictions)
Qualifier:
according to
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
Temp.:
25 °C
Vapour pressure:
0.69 Pa
Conclusions:
The vapour pressure of m-xylylenediamine (MXDA) is reported as 0.69 Pa at 25°C.
Endpoint:
vapour pressure
Type of information:
migrated information: read-across from supporting substance (structural analogue or surrogate)
Adequacy of study:
weight of evidence
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: read across to the amine component (1,3-Bis(aminomethyl)benzene) in the substance.
Guideline:
other: no guideline reported
Temp.:
25 °C
Vapour pressure:
0.04 hPa
Remarks on result:
other: calculated

Description of key information

Due to unreliable test results of the tested substance, the vapour pressure of m-phenylenebis(methylamine) of 0.69 Pa at 25°C was taken for the chemical safety assessment.  

Key value for chemical safety assessment

Vapour pressure:
0.69 Pa
at the temperature of:
25 °C

Additional information

The vapour pressure of the 'BADGE-MXDA' was determined by a slightly modified OECD 104 method at three different temperatures (10°C, 25°C and 50°C). The results were: 253.3 Pa@10°C, 373.3 Pa@25°C, 826.6 Pa@50°C. These results are unreliable, because the measured vapour pressure is much higher than the v.p. of the pure amine (MXDA, 0.69 Pa at 25°C, taken from the Safety Data Sheet of a manufacturer. .

It is assumed that the tested sample has picked up significant amounts of moisture which has probably falsified the test results. It is planned to run this v.p. test again under dry conditions.

Until new results will become available, the vapour pressure of the amine (MXDA, 0.69 Pa @25°C)) has therefore been used in a weight of evidence approach for the Chemical Safety Assessment of the substance. The rational for this is, because the amine is the component with the lowest molecular weight, the highest volatility and highest health hazard. It has therefore been used for the human health related exposure assessments.

Other publications report a calculated vapour pressure of MXDA of 4.0 Pa at 25°C. The vapour pressure as measured according to the OECD 104 guidelines (0.69 Pa@25°C) seems to be the most reliable value.