1,4,5,6,7,7-hexachloro-8,9,10-trinorborn-5-ene-2,3-dicarboxylic anhydride

Vapour pressure

Link to relevant study record(s)

Reference

Reference 1

Endpoint:

vapour pressure

Type of information:

experimental study

Adequacy of study:

supporting study

Study period:

From 29 October 2015 to 30 November 2015

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

OECD Guideline 104 (Vapour Pressure Curve)

Deviations:

no

Qualifier:

according to guideline

Guideline:

EU Method A.4 (Vapour Pressure)

Deviations:

no

GLP compliance:

no

Type of method:

effusion method: Knudsen cell

Key result

Test no.:

#1

Temp.:

20 °C

Vapour pressure:

0 Pa

Remarks on result:

other: extrapolated result

Test no.:

#2

Temp.:

25 °C

Vapour pressure:

0 Pa

Remarks on result:

other: extrapolated result

The vapour pressure was too low to be measured at 52°C (results for this temperature were excluded from calculations of final results), but good results were achieved from 91 to 115°C giving confidence in the extrapolated results.

Conclusions:

The vapour pressure was found to be 1.875E-8 Pa at 20°C and 3.685E-8 Pa at 25°C

Executive summary:

The vapour pressure of Chlorendic Acid was determined in accordance with OECD Testing Guideline 104 and EU Method A4 using the Knudsen cell effusion method. The vapour pressure was too low to be measured at 52°C (results for this temperature were excluded from calculations of final results), but good results were achieved from 91 to 115°C giving confidence in the extrapolated results. The vapour pressure was calculated to be 1.875E-8 Pa at 20°C and 3.685E-8 Pa at 25°C.

Reference 2

Endpoint:

vapour pressure

Type of information:

experimental study

Adequacy of study:

key study

Study period:

6 June to 3 July 2002

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: Study undertaken at GLP accredited laboratory.

Qualifier:

according to guideline

Guideline:

EU Method A.4 (Vapour Pressure)

Deviations:

no

Qualifier:

according to guideline

Guideline:

OECD Guideline 104 (Vapour Pressure Curve)

Deviations:

no

GLP compliance:

yes

Type of method:

effusion method: vapour pressure balance

Temp.:

25 °C

Vapour pressure:

ca. 0.003 Pa

Transition / decomposition:

no

Three runs were performed between 27 and 79 C. The same sample was used for each tes, with the pressure being kept at less than 1*10 -5 Torr.

Conclusions:

The vapour pressure of chlorendic anhydride is 2.68 x 10 -3 Pa at 25°C.

Description of key information

Although the vapour pressure of chlorendic anhydride was measured as 2.68E-03 Pa at 25°C, chlorendic anhydride hydrolyses to chlorendic acid in the environment.  Therefore the vapour pressure of chlorendic acid (1.875E-8 Pa at 20°C) was used for the Chemical Safety Assessment.

Key value for chemical safety assessment

Vapour pressure:

0 Pa

at the temperature of:

20 °C