Registration Dossier

Data platform availability banner - registered substances factsheets

Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Physical & Chemical properties

Vapour pressure

Currently viewing:

Administrative data

Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
key study
Study period:
Experimental work started on 16 Feb 2018 and finished on 21 Feb 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 guidelineopen allclose all
Qualifier:
according to guideline
Guideline:
EU Method A.4 (Vapour Pressure)
Version / remarks:
Vapour Pressure of Commission Regulation (EC) No 440/2008 of 30 May 2008
Qualifier:
according to guideline
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
Version / remarks:
23 March 2006
GLP compliance:
yes
Type of method:
effusion method: vapour pressure balance

Test material

Constituent 1
Chemical structure
Reference substance name:
Copper dichromium tetraoxide
EC Number:
234-634-6
EC Name:
Copper dichromium tetraoxide
Cas Number:
12018-10-9
Molecular formula:
Cr2CuO4
IUPAC Name:
dichromium(3+) copper(2+) tetraoxidandiide
Test material form:
solid: particulate/powder
Specific details on test material used for the study:
Identification: Copper dichromium tetraoxide
CAS Number: 12018-10-9
Appearance/Physical state: Dark blue powder
Batch: EX 14502.6
Purity: 43.2% (Cr), 28.3% (Cu)
Expiry date: 01 January 2023
Storage conditions: Room temperature in the dark

Results and discussion

Vapour pressureopen allclose all
Test no.:
#1
Temp.:
190 °C
Vapour pressure:
0.08 Pa
Test no.:
#1
Temp.:
191 °C
Vapour pressure:
0.04 Pa
Test no.:
#1
Temp.:
192 °C
Vapour pressure:
0.02 Pa
Test no.:
#1
Temp.:
193 °C
Vapour pressure:
0.031 Pa
Test no.:
#1
Temp.:
194 °C
Vapour pressure:
0.019 Pa
Test no.:
#1
Temp.:
195 °C
Vapour pressure:
0.03 Pa
Test no.:
#1
Temp.:
196 °C
Vapour pressure:
0.029 Pa
Test no.:
#1
Temp.:
197 °C
Vapour pressure:
0.023 Pa
Test no.:
#1
Temp.:
198 °C
Vapour pressure:
0.007 Pa
Test no.:
#1
Temp.:
199 °C
Vapour pressure:
0 Pa
Test no.:
#1
Temp.:
200 °C
Vapour pressure:
0 Pa
Test no.:
#2
Temp.:
190 °C
Vapour pressure:
0.043 Pa
Test no.:
#2
Temp.:
191 °C
Vapour pressure:
0 Pa
Test no.:
#2
Temp.:
192 °C
Vapour pressure:
0.028 Pa
Test no.:
#2
Temp.:
193 °C
Vapour pressure:
0.031 Pa
Test no.:
#2
Temp.:
194 °C
Vapour pressure:
0.023 Pa
Test no.:
#2
Temp.:
195 °C
Vapour pressure:
0.043 Pa
Test no.:
#2
Temp.:
196 °C
Vapour pressure:
0.04 Pa
Test no.:
#2
Temp.:
197 °C
Vapour pressure:
0.04 Pa
Test no.:
#2
Temp.:
198 °C
Vapour pressure:
0.023 Pa
Test no.:
#2
Temp.:
199 °C
Vapour pressure:
0.04 Pa
Test no.:
#2
Temp.:
200 °C
Vapour pressure:
0.036 Pa
Test no.:
#3
Temp.:
190 °C
Vapour pressure:
0.037 Pa
Test no.:
#3
Temp.:
191 °C
Vapour pressure:
0.041 Pa
Test no.:
#3
Temp.:
192 °C
Vapour pressure:
0.039 Pa
Test no.:
#3
Temp.:
193 °C
Vapour pressure:
0.04 Pa
Test no.:
#3
Temp.:
194 °C
Vapour pressure:
0.03 Pa
Test no.:
#3
Temp.:
195 °C
Vapour pressure:
0.044 Pa
Test no.:
#3
Temp.:
196 °C
Vapour pressure:
0.02 Pa
Test no.:
#3
Temp.:
197 °C
Vapour pressure:
0.042 Pa
Test no.:
#3
Temp.:
198 °C
Vapour pressure:
0.034 Pa
Test no.:
#3
Temp.:
199 °C
Vapour pressure:
0.044 Pa
Test no.:
#3
Temp.:
200 °C
Vapour pressure:
0.044 Pa
Test no.:
#4
Temp.:
190 °C
Vapour pressure:
0.041 Pa
Test no.:
#4
Temp.:
191 °C
Vapour pressure:
0.044 Pa
Test no.:
#4
Temp.:
192 °C
Vapour pressure:
0.035 Pa
Test no.:
#4
Temp.:
193 °C
Vapour pressure:
0.036 Pa
Test no.:
#4
Temp.:
194 °C
Vapour pressure:
0.03 Pa
Test no.:
#4
Temp.:
195 °C
Vapour pressure:
0.027 Pa
Test no.:
#4
Temp.:
196 °C
Vapour pressure:
0.028 Pa
Test no.:
#4
Temp.:
197 °C
Vapour pressure:
0.047 Pa
Test no.:
#4
Temp.:
198 °C
Vapour pressure:
0.039 Pa
Test no.:
#4
Temp.:
199 °C
Vapour pressure:
0.055 Pa
Test no.:
#4
Temp.:
200 °C
Vapour pressure:
0.045 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 199 ºC (472.15 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 3.21 x 10-3 Pa 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 3.3 x 10^-3 Pa at 25 ºC.
Executive summary:

The study was was conducted in compliance with Good Laboratory Practice standards. The vapor pressure of Copper dichromium tetraoxide has been determined to be less than 3.3 x 10-3 Pa at 25 °C, using the vapor pressure balance method, designed to be compatible with Method A.4 Vapour Pressure of Commission Regulation (EC) No 440/2008 of 30 May 2008, and Method 104 of the OECD Guidelines for Testing of Chemicals, 23 March 2006.