Reaction mass of sodium amino-bis{[4-(ethenylsubstituted)phenyl]diazenyl}-hydroxynaphthalenesulfonate and polysodium amino-{[4-(ethenylsubstituted)phenyl]diazenyl}-{[4-(ethenylsubstituted)-2-sulfonatophenyl]diazenyl}-hydroxynaphthalenesulfonate and polysodium amino-bis{[4-(ethenylsubstituted)-2-sulfonatophenyl]diazenyl}-hydroxynaphthalenesulfonate

Vapour pressure

Link to relevant study record(s)

Reference

Endpoint:

vapour pressure

Type of information:

calculation (if not (Q)SAR)

Remarks:

Estimated by calculation

Adequacy of study:

key study

Study period:

2015

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: Expert judgement

Reason / purpose for cross-reference:

reference to same study

Reason / purpose for cross-reference:

reference to other study

Qualifier:

according to guideline

Guideline:

other: EPISUITE provided by the Environmental Protection Agency (US EPA) Vers. 4.11

Deviations:

no

Principles of method if other than guideline:

EPISUITE provided by the Environmental Protection Agency (US EPA) Vers. 4.11

GLP compliance:

no

Type of method:

other:

Specific details on test material used for the study:

None

Key result

Test no.:

#1

Temp.:

25 °C

Vapour pressure:

0.007 Pa

Remarks on result:

other: limit value of all the known components

Total composition and calculated vapour pressures:

Main component 1 calculated vapour pressure 3.68*10-25 Pa at 25 °C

Main component 2 calculated vapour pressure 6.46*10-31 Pa at 25 °C

Main component 3 calculated vapour pressure 4.01*10-37 Pa at 25 °C

Main component 4 calculated vapour pressure 5.45*10-24 Pa at 25 °C

By-product calculated vapour pressure 7.28*10-3 Pa at 25 °C

Unknown organic by-products

Water

Sodiumsulfate

Disodiumhydrogenphosphate

Sodiumdihydrogenphosphate

Diammoniumhydrogenphosphate

Ammoniumdihydrogenphosphate

Sodiumchloride

Potasiumchloride

Conclusions:

The limit value vapour pressure of the test item, FAT 40866/A TE was calculated to be 7.28×10-3 Pa.

Executive summary:

Calculation of the vapor pressure of the known compounds was made with the software EPISUITE provided by the Environmental Protection Agency (US EPA) Vers. 4.11 using the mean of the modified Grain method on the basis of the structures and SMILES-Codes provided by the sponsor. For the sodium salts the structure and SMILES-Codes of the corresponding free acids were used.

The vapor pressure of the main components could not be determined using any of the methods stated in the guidelines as the recommended range for all methods is far above the calculated value. The vapor pressure of the sodium salts can be expected much lower than the calculated values of the free acids as normally salts have a lower vapor pressure as the corresponding free acids. The vapor pressure of the inorganic salts is not determinable as well.

The vapor pressure of the known by products was calculated as 7.28 ×10^-3 Pa. which should be considered as limit value of all the known components.

Description of key information

The limit value vapour pressure of the test item, FAT 40866/A TE was calculated to be 7.28×10-3 Pa.

Key value for chemical safety assessment

Vapour pressure:

0.001 Pa

at the temperature of:

25 °C

Additional information

The limit value vapour pressure of the test item, FAT 40866/A TE was calculated to be 7.28×10-3 Pa at 25°C.