Disodium 3,3'-[carbonylbis[imino(3-methoxy-4,1-phenylene)azo]]bis[benzenesulphonate]

Vapour pressure

Administrative data

Endpoint:

vapour pressure

Type of information:

experimental study

Adequacy of study:

key study

Study period:

Experimental starting date: 08 September 2017; Experimental completion date: 11 September 2017

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2017

Report date:

2017

Materials and methods

Test guideline

Test guideline 1

Qualifier:

according to guideline

Guideline:

OECD Guideline 104 (Vapour Pressure Curve)

Deviations:

no

Test guideline 2

Qualifier:

according to guideline

Guideline:

EU Method A.4 (Vapour Pressure)

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Type of method:

effusion method: vapour pressure balance

Test material

Test material information

Constituent 1

Reference substance name:

Disodium 3,3'-[carbonylbis[imino(3-methoxy-4,1-phenylene)azo]]bis[benzenesulphonate]

EC Number:

233-316-4

EC Name:

Disodium 3,3'-[carbonylbis[imino(3-methoxy-4,1-phenylene)azo]]bis[benzenesulphonate]

Cas Number:

10114-86-0

Molecular formula:

C27H22N6Na2O9S2

IUPAC Name:

disodium 3,3'-[carbonylbis[imino(3-methoxy-4,1-phenylene)azo]]bis[benzenesulphonate]

Test material form:

solid: particulate/powder

Details on test material:

Identification: CIM-42(Direct Yellow 132)
CAS No: 10114-86-0
Appearance/Physical state: Dark orange colored powder
Batch: 150909K
Purity: 90.3%
Expiry date: 01 October 2017
Storage conditions: Room temperature over silica gel, in the dark

Results and discussion

Vapour pressure

Key result

Temp.:

25 °C

Vapour pressure:

< 0.001 Pa

Remarks on result:

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

Transition / decomposition

Transition / decomposition:

no

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 5 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 196ºC (469.15K) was chosen because this is the data point which gives the highest estimated vapor pressure at any given temperature when a slope of –1500 K is imposed upon it.

The value of –1500 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 7.34 x 10^-4 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 7.4 x 10-4 Pa at 25 ºC.

Executive summary:

Thevapor pressure of CIM-42(Direct Yellow 132)has been determined to be less than 7.4 x 10^-4Pa 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.