Registration Dossier

Administrative data

Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
key study
Study period:
Experimental starting date: 14 March 2018. Experimental completion date:16 March 2018
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2018

Materials and methods

Test guideline
Qualifier:
according to
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
Deviations:
no
GLP compliance:
yes (incl. certificate)
Type of method:
effusion method: vapour pressure balance

Test material

Reference
Name:
Unnamed
Type:
Constituent
Test material form:
solid: particulate/powder
Details on test material:
Identification: 1-(methylamino)-4-[(3-methylphenyl)amino] anthraquinone
Physical state/Appearance: dark red powder
Batch: 702W01
Purity: 99.4%
Expiry Date: 08 February 2020
Storage Conditions: room temperature in the dark
Intended use/Application: industrial chemical

Results and discussion

Vapour pressure
Key result
Temp.:
25 °C
Vapour pressure:
< 0.002 Pa

Any other information on results incl. tables

The test item did not change in appearance under the conditions used in the determination.

No statistical analyses were performed because the balance readings were too low and variable for a line of best fit to have any meaning. Instead it was considered more appropriate to impose a regression slope on a chosen data point to provide an estimate of the maximum value for the vapor pressure at 25 ºC.

Run 4 was chosen because the sample had been under vacuum for the longest period prior to this run and so degassing would have been the most complete. The reading at 128 ºC
(401.15 K) was chosen because this is the data point which gives the highest estimated vapor pressure at any given temperature when a slope of –1000 K is imposed upon it.

The value of –1000 K is an in-house value and is the shallowest slope observed whilst determining the vapor pressure on a wide range of samples using the vapor pressure balance method. Extrapolation to 25 ºC gave a vapor pressure of 1.91 x 10-3Pa which has been taken as a maximum for this material.

Applicant's summary and conclusion

Conclusions:
The vapor pressure of the test item has been determined to be less than 2.0 x 10-3 Pa at 25 ºC.