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Physical & Chemical properties

Vapour pressure

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Administrative data

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Reference
Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
key study
Study period:
August 2015
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
equivalent or similar to guideline
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
Qualifier:
equivalent or similar to guideline
Guideline:
EU Method A.4 (Vapour Pressure)
GLP compliance:
yes (incl. QA statement)
Type of method:
isoteniscope
Key result
Temp.:
25 °C
Vapour pressure:
ca. 0.023 Pa
Remarks on result:
other: The vapour pressure of the product was measured at different temperatures (between 30 and 40 °C) in 6 runs. Then, it was extrapolated to 25 C°.

Six equations were derived from the three experiments that were run on this product. Vapour pressure is related to temperature by Equation: log10 (Vp) = slope/temperature + intercept where Vp is expressed in Pascal and temperature is expressed in Kelvin.

The results are given in the following table:

Experiment #

Slope

Intercept

logVp

at 25 °C

Vp (Pa)

at 25 °C

1

-6490

20.1

-1.67

0.021

2

-6400

19.8

-1.65

0.022

3

-6410

19.9

-1.65

0.025

4

-6210

19.2

-1.62

0.024

5

-6260

19.4

-1.62

0.025

6

-6390

19.8

-1.65

0.023

Average

-6360

19.7

-1.63

0.023

Conclusions:
The vapour pressure of the test item has been determined to be 0.023 Pa at 25 °C.

Description of key information

0.023 Pa at 25 °C

Key value for chemical safety assessment

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

Additional information

The measured vapour pressure of 2 -amino-2-methyl-1,3-propanediol in the temperature range of 30 to 40 °C, allowed us to extrapolate its value at 25 °C, with a value of 0.023 Pa. This value is supported by a calculation using EPIWIN Suite 4.1 from EPA which gave a value of 0.0212 Pa with the Modified Grain method and 0.0214 Pa with the Antoine method. Both values are in good agreement with the measured/extrapolated value.