Thermal cracking oil from blends of rubber, fuel oils and paraffin waxes, steam distillation concentrate

Water solubility

Link to relevant study record(s)

Reference

Endpoint:

water solubility

Type of information:

experimental study

Adequacy of study:

key study

Study period:

03/06/2019-11/06/2019

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

OECD Guideline 105 (Water Solubility)

Deviations:

no

GLP compliance:

no

Type of method:

flask method

Water solubility:

ca. 16 other: TC/L

Conc. based on:

other: Total carbon

Loading of aqueous phase:

100 mg/L

Incubation duration:

24 h

Temp.:

20 °C

pH:

>= 8.99 - <= 9.12

Remarks on result:

other: reported as mg TC/L

Water solubility:

ca. 58.6 other: TC/L

Conc. based on:

other: Total carbon

Loading of aqueous phase:

1 000 mg/L

Incubation duration:

24 h

Temp.:

20 °C

pH:

>= 8.99 - <= 9.14

Remarks on result:

other: reported as mg TC/L

Details on results:

As no specific analysis was feasible, the TC originating from the test item and dissolved in water was used as cumulative parameter for quantification. The overall mean value for the blank measurement was 0.869 mg carbon/L,this value was substracted from the TC measured in the test samples. According to the test guideline, the result found after a defined incubation time should not differ by more than 15 % from the result found after a shorter incubation time. For both loading rates, the maximum increase recorded (6.9 %) was lower than 15%. The acceptance criterium was therefore fulfilled and the study is valid.

Conclusions:

Thermal cracking oil from blends of rubber, fuel oils and paraffin waxes, steam distillation condensate at a loading rate of approximately 100 mg/L, the water solubility at 20 °C was found to be slightly soluble (0.1-100mg/L) 16.0 ± 0.8 mg TC/L(mean ± standard deviation) . At a loading rate of about 1000 mg/L, the water solubility at 20 °C was found to be slightly soluble (0.1-100mg/L) 58.6 ± 1.6 mg TC/L(mean ± standard deviation).

Executive summary:

The water solubility of Thermal cracking oil from blends of rubber, fuel oils and paraffin waxes, steam distillation condensate was determined using the OECD 105: Water solubility shake flask method (non-GLP). As the substance is a UVCB the test was carried out at two different loading rates: about 100 mg test item/L for the lower loading rate, and about 1000 mg/L for the higher loading rate at 20 °C. As no specific analysis was feasible, the total carbon (TC) originating from the test item and dissolved in water was used as a cumulative parameter for quantification. The TC concentration was determined using a total organic carbon (TOC) analyzer able to measure TC. In a preliminary test, the water solubility of the test item was estimated based on a total carbon measured in a water sample of about 7.6 mg carbon/L. For the substance

at a loading rate of approximately 100 mg/L, the water solubility at 20 °C was found to be 16.0 ± 0.8 mg TC/L Slightly soluble (0.1 -100mg/l). For the substance at a loading rate of approximately 1000 mg/L, the water solubility at 20 °C was found to be 58.6 ± 1.6 mg TC/L. As the test item is a mixture of several constituents with different solubilities, the results are loading rate dependent and therefore will be regarded as approximated values.Furthermore the results reflect only the carbonic part of the test item.

Description of key information

Thermal cracking oil from blends of rubber, fuel oils and paraffin waxes, steam distillation condensate at a loading rate of approximately 100 mg/L, the water solubility at 20 °C was found to be slightly soluble 16.0 ± 0.8 mg TC/L(mean ± standard deviation) . At a loading rate of about 1000 mg/L, the water solubility at 20 °C was found to be slightly soluble 58.6 ± 1.6 mg TC/L(mean ± standard deviation).

Key value for chemical safety assessment

at the temperature of:

20 °C