Sodium O,O-diisobutyl dithiophosphate

Vapour pressure

Link to relevant study record(s)

Reference

Reference 1

Endpoint:

vapour pressure

Type of information:

(Q)SAR

Adequacy of study:

key study

Study period:

07 MAR 2022

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

results derived from a valid (Q)SAR model and falling into its applicability domain, with adequate and reliable documentation / justification

Justification for type of information:

1. SOFTWARE
OECD QSAR toolbox v4.5

2. MODEL (incl. version number)
MPBPWIN v1.44

3. SMILES OR OTHER IDENTIFIERS USED AS INPUT FOR THE MODEL
[Na+].CC(C)COP([S-])(=S)OCC(C)C

4. SCIENTIFIC VALIDITY OF THE (Q)SAR MODEL
Please refer to the QMRF attached under 'Attached justification'.

5. APPLICABILITY DOMAIN
Please refer to the QMRF attached under 'Attached justification'.

Qualifier:

according to guideline

Guideline:

other: REACH guidance on QSARs Chapter R.6

Version / remarks:

May 2008

Principles of method if other than guideline:

Software tool(s) used including version: OECD QSAR toolbox v4.5, EPI Suite v4.11
- Model(s) used: MPBPWIN v1.44
- Model description: see field 'Attached justification'
- Justification of QSAR prediction: see field 'Justification for type of information', 'Attached justification'

Specific details on test material used for the study:

[Na+].CC(C)COP([S-])(=S)OCC(C)C

Temp.:

25 °C

Vapour pressure:

0 Pa

Remarks on result:

other: (Modified Grain Method)

Temp.:

25 °C

Vapour pressure:

0 mm Hg

Remarks on result:

other: (Modified Grain Method)

Conclusions:

The vapour pressure of test item was calculated to be 2.06E-008 mmHg (2.74E-006 Pa) using the US- EPA software MPBPWIN v1.44.

Executive summary:

The estimation of vapour pressure was done using the software MPBPWIN v.1.44 implemented in EPIWIN program. The vapour pressure of test item was calculated to be 2.06E-008 mmHg (2.74E-006 Pa). The prediction was in the applicability domain of the model.

Reference 2

Endpoint:

vapour pressure

Type of information:

experimental study

Adequacy of study:

key study

Study period:

20-06-2012-27-06-2012

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

comparable to guideline study

Qualifier:

according to guideline

Guideline:

OECD Guideline 104 (Vapour Pressure Curve)

GLP compliance:

no

Type of method:

static method

Specific details on test material used for the study:

The production method yields the substance in an approximately 50% aqueous solution with a content of sodium hydroxide. A sample of this has been dehydrated in order to perform the test.

Key result

Temp.:

21.2 °C

Vapour pressure:

< 0.1 mBar

Key result

Temp.:

34.4 °C

Vapour pressure:

< 0.1 mBar

Key result

Temp.:

46.2 °C

Vapour pressure:

< 0.1 mBar

The vapour pressure was determined by a static method.

Few grams of material were placed in a 50 ml glass bottle.

Glass bottle thermostated and system evacuated with a vacuum pump for 5 minutes.

Pressure measured with a pressure transmitter, Yokogawa no 918609418. Measuring up to 130 mBar

Results at 21.2°C, 34.4 °C and 46.2°C pressure was below 0.1 mBar (10 Pa)

Conclusions:

Results at 21.2°C, 34.4 °C and 46.2°C pressure was below 0.1 mBar (10 Pa)

Executive summary:

The vapour pressure was determined by a static method. Few grams of material were placed in a 50 ml glass bottle. Glass bottle thermostated and system evacuated with a vacuum pump for 5 minutes. Pressure measured with a pressure transmitter, Yokogawa no 918609418. Measuring up to 130 mBar Results at 21.2°C, 34.4 °C and 46.2°C pressure was below 0.1 mBar (10 Pa)

Description of key information

The estimation of vapour pressure was done using the software MPBPWIN v.1.44 implemented in EPIWIN program. The vapour pressure of test item was calculated to be 2.06E-008 mmHg (2.74E-006 Pa). The prediction was in the applicability domain of the model.

Key value for chemical safety assessment

Vapour pressure:

0 Pa

at the temperature of:

25 °C

Additional information

Dehydrated sample of IBP1-Na (produced by adding aqueous NaOH to IBP-1)