Phosphoric Acid, C8-12(even-numbered) linear Alkyl Esters

Vapour pressure

Link to relevant study record(s)

Reference

Reference 1

Endpoint:

vapour pressure

Type of information:

calculation (if not (Q)SAR)

Adequacy of study:

weight of evidence

Study period:

9th - 19th September, 2016

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

OECD Guideline 104 (Vapour Pressure Curve)

Version / remarks:

23rd March 2006

Deviations:

no

GLP compliance:

not specified

Type of method:

other: estimation using the Grain-Watson method

Specific details on test material used for the study:

SOURCE OF TEST MATERIAL
- Source and lot/batch No.of test material: 7703200
- Expiration date of the lot/batch: 2019-02-28

Test no.:

#1

Temp.:

20 °C

Vapour pressure:

<= 4.7 Pa

Test no.:

#2

Temp.:

50 °C

Vapour pressure:

<= 46 Pa

DSC plots are attached.

Conclusions:

The test item has an estimated vapour pressure of <= 4.7 Pa at 20 °C.

Executive summary:

The vapour pressure of the test item was determined in accordance with OECD TG 104. The experimentally-determined vapour pressure of the test item at 20°C was not in the recommended range of 1 to 1000 mbars for DSC measurements. Therefore an estimation procedure in accordance with OECD TG 104 was used (Grain-Watson method). This method is applied for vapour pressures between 10E03 to 10E-07 mbar. The estimated vapour pressure is <= 4.7 Pa at 20 °C and <=46 Pa at 50 °C.

Reference 2

Endpoint:

vapour pressure

Type of information:

experimental study

Adequacy of study:

weight of evidence

Study period:

2017-06-13 - 2017-06-13

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

EU Method A.4 (Vapour Pressure)

GLP compliance:

not specified

Type of method:

static method

Test no.:

#1

Temp.:

20 °C

Vapour pressure:

0.45 Pa

Conclusions:

The vapour pressure was 0.45 Pa at 20 °C.

Executive summary:

The vapour pressure of the test item was measured according to EU Method A.4 (Static method). The vapour pressure was 0.45 Pa at 20 °C.

Description of key information

Based on a weight of evidence approach the test item has an estimated vapour pressure of 0.45 Pa at 20°C.

Key value for chemical safety assessment

Vapour pressure:

0.45 Pa

at the temperature of:

20 °C

Additional information

The vapour pressure of the test item was determined in accordance with OECD TG 104. The experimentally-determined vapour pressure of the test item at 20°C was not in the recommended range of 1 to 1000 mbars for DSC measurements. Therefore an estimation procedure in accordance with OECD TG 104 was used (Grain-Watson method). This method is applied for vapour pressures between 10E03 to 10E-07 mbar. The estimated vapour pressure is <= 4.7 Pa at 20°C and <=46 Pa at 50°C.

A measured vapour pressure is available for Phosphoric acid, C4 and C12-14(even numbered) alkyl esters. Since this substance contains similar chain lengths as the C8 -12 esters, and in addition, a significant proportion of C4 esters, this measured result is considered to be more representative of the likely vapour pressure of the substance and is adopted for exposure assessment.