Phenol, paraalkylation products with C10-15 branched olefins ( C12 rich) derived from propene oligomerization, calcium salts, sulfurized, including distillates (petroleum), hydrotreated, solvent-refined, solvent-dewaxed, or catalyc dewaxed, light or heavy paraffinic C15-C50

Vapour pressure

Link to relevant study record(s)

Reference

Reference 1

Endpoint:

vapour pressure

Type of information:

experimental study

Adequacy of study:

key study

Study period:

March 24, 2021

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

study well documented, meets generally accepted scientific principles, acceptable for assessment

Justification for type of information:

Alternative method most appropriate for this substance.

Principles of method if other than guideline:

OECD Guideline 104 (OECD Guidelines for the Testing of Chemicals) states vapor pressure may be calculated if the vapor pressure is expected to be less than 10 Pa. A different calculation method than the one detailed in Guideline 104’s Appendix, however, was deemed more appropriate for this sample type.
GLS Test Code 15118, Thermogravimetric analysis differential thermal analysis (TGA-DTA) Vapor Pressure, was used to determine the vapor pressure at 20 ºC of test material EC 701-249-4.

GLP compliance:

no

Other quality assurance:

ISO/IEC 17025 (General requirements for the competence of testing and calibration laboratories)

Type of method:

other: Thermogravimetric analysis differential thermal analysis

Key result

Test no.:

#1

Temp.:

20 °C

Vapour pressure:

ca. 0.002 Pa

Remarks on result:

not measured/tested

Conclusions:

The vapor pressure of the substance EC 701-249-4 was evaluated using a modified method most appropriate for the large molecular weight, highly viscous, substance that has a very low vapor pressure that cannot be measured by traditional means.
The vapor pressure in this study was 0.00232 Pa @20C

Executive summary:

The vapor pressure of the substance EC 701-249-4 was evaluated using a modified method most appropriate for the large molecular weight, highly viscous, substance that has a very low vapor pressure that cannot be measured by traditional means.

The vapor pressure in this study was 0.00232 Pa @20C

Reference 2

Endpoint:

vapour pressure

Type of information:

read-across based on grouping of substances (category approach)

Adequacy of study:

supporting study

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

study well documented, meets generally accepted scientific principles, acceptable for assessment

Justification for type of information:

The intent of this experiment was to determine whether exposure to a similar alkyl phenate sulfide or the residual tetrapropenyl phenol (TPP) starting material may occur when the material is handled at elevated temperature.

Principles of method if other than guideline:

Gas chromatography coupled with Mass Spectrometry has been used to identify the vapors present in phenol, dodecyl-, sulfurized, carbonates, calcium salts, overbased at 70oC, in order to determine if any significant vapor concentration for the phenate, TPP impurity or the diluent oil is observed at 70oC.

Key result

Temp.:

70 °C

Remarks on result:

other: Neither the registered alkyl phenate substance or the residual impurity was dectected in the headspace after 3 days at 70C

The major peaks observed corresponded to the air and water (retention time 2.4 – 3.4 min). There was a small amount of ethanol observed at 3.6 minutes. The peaks between retention times 13-20 min correspond to the systemic contaminations from the headspace vial. There was no evidence indicating any significant concentrations of the diluent oil, TPP or low molecular weight phenate residues.

Conclusions:

No significant vapor concentrations for the phenate, TPP impurity or the diluent oil are observed at 70oC.

Executive summary:

A study was conducted to determine the potential exposure of the substance or the residual impurity TPP (EC 310 -154 -3) at elevated temperatures to mimic higher process temperatures. The substance was kept at 70C for 3 days and the headspace was collected and analyzed. No significant vapor concentrations for the phenate or TPP were measured.

Description of key information

The vapor pressure of the substance EC 701-249-4 was evaluated using a modified method most appropriate for the large molecular weight, highly viscous, substance that has a very low vapor pressure that cannot be measured by traditional means.

The vapor pressure in this study was 0.00232 Pa @20C.

In addition, a supporting study (Cheng, 2014) looked at the headspace vapor of an analog, EC 701 -251 -5, after the material was kept at 70 °C for 3 days. Neither the alkyl phenate sulfide substance or impurity (TPP; EC 310 -154 -3) was detected, further demonstrating that the vapor pressure is very low and inhalation exposure is expected to be low for both the alkyl phenate sulfides and TPP.

Key value for chemical safety assessment

Vapour pressure:

0.002 Pa

at the temperature of:

20 °C

Additional information

The substance being registered is composed of a series of alkylated phenol species of variable composition and a highly refined, lubricant base oil necessary to act as a solvent for the synthetic reaction and to optimize the reaction kinetics used in the substance’s manufacture. Attempts to remove this base oil from the substance result in changes to the other components’ original structures and the physicochemical characteristics of the substance as a whole. With this in mind, the substance is being registered to include the base oil as a component of the substance and thus the base oil is present in the test material.

The vapor pressure of the substance EC 701-249-4 was evaluated using a modified method most appropriate for the large molecular weight, highly viscous, substance that has a very low vapor pressure that cannot be measured by traditional means.

The vapor pressure in this study was 0.00232 Pa @20C.