Resin acids and Rosin acids, hydrogenated, sodium salts

Vapour pressure

Link to relevant study record(s)

Reference

Endpoint:

vapour pressure

Type of information:

(Q)SAR

Adequacy of study:

key study

Study period:

2018

Reliability:

1 (reliable without restriction)

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:

The test item is a UVCB substance, therefore, vapour pressure was estimated using QSARs. The detailed justification and methodology is provided in the full report attached to "Full Report" Section.

Qualifier:

no guideline required

Principles of method if other than guideline:

QSAR calculation, please see attached justification document in the full report attached in the "Attached full report " section.'

GLP compliance:

no

Type of method:

other: QSAR Calculation

Key result

Test no.:

#1

Temp.:

20 °C

Vapour pressure:

0.107 Pa

Remarks on result:

other: Room temperature assumed.

The QSAR calculation is based on the hypothesis that changes in molecular structure reflect changes in the observed response or biological activity and, is a widely accepted predictive and diagnostic process used for finding associations between chemical structures. To obtain results for specific mixes of components, it is necessary to input both the vapor pressure and what percentage of the total substance mix the individual component represents. Where data is missing, as in the case of DRT’s chemical table found in appendix 3, the total sum of the components does not add up to 100% of the substance (i.e. the final result requires scaling upto 100%). The scale was calculated by using 100 divided by the sum of the percentages (100/sum%) in the calculation table, and was finally multiplied by the vapor pressure, to give a slightly higher vapor pressure which is representative of the substance.

Conclusions:

The Vapour Pressure of the substance Sodium Salts of Hydrogenated Rosin was predicted using EPISuite v4.113 (Estimation Program Interface), MPBPVP v1.43 (Melting and boiling points, vapor pressure) (US EPA 2012). The final Vapor Pressure (Pa), scaled to represent 100% of the substance was determined to be 0.107331 Pa.

Executive summary:

The Vapour Pressure of the substance Sodium Salts of Hydrogenated Rosin was predicted using EPISuite v4.113 (Estimation Program Interface), MPBPVP v1.43 (Melting and boiling points, vapor pressure) (US EPA 2012). The final Vapor Pressure (Pa), scaled to represent 100% of the substance was determined to be 0.107331 Pa.

Description of key information

The Vapour Pressure of the substance Sodium Salts of Hydrogenated Rosin was predicted using EPISuite v4.113 (Estimation Program Interface), MPBPVP v1.43 (Melting and boiling points, vapor pressure) (US EPA 2012). The final Vapor Pressure (Pa), scaled to represent 100% of the substance was determined to be 0.107331 Pa.

Key value for chemical safety assessment

Vapour pressure:

0.107 Pa