Decahydro-2-naphthyl acetate

Water solubility

Link to relevant study record(s)

Reference

Endpoint:

water solubility

Type of information:

experimental study

Adequacy of study:

key study

Study period:

17 October 2016 - 21 October 2016

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

OECD Guideline 105 (Water Solubility)

Version / remarks:

1995

Deviations:

no

Qualifier:

according to guideline

Guideline:

EU Method A.6 (Water Solubility)

Version / remarks:

2014

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Type of method:

flask method

Key result

Water solubility:

54 mg/L

Conc. based on:

test mat.

Loading of aqueous phase:

600 mg/L

Incubation duration:

24 h

Temp.:

20 °C

pH:

6.1

Details on results:

A linear calibration curve was obtained from 0.5 to 25 µg/L test item (n=6, r2> 0.992). The limit of detection (LOD) was 0.1 µg/L (determined as S/N = 3) and the limit of quantification (LOQ) was 10 mg/L. Recovery of the fortified samples was determined to be 102% at 10 mg/L (n=4, 2.0% coefficient of variation) and 88% at 40 mg/L (n=5, 4.3% coefficient of variation). Sample peaks (m/z 94, 107, 121 and 136) were confirmed by comparison against standard peak spectra.

No Tyndall effects were observed in any of the test item replicates or the control. The mean measured temperature during the pre-incubation phase was 29.95 ± 0.04°C (min 29.87, max 30.00) and during the incubation phase was 20.05 ± 0.04°C (min 19.98, max 20.20).

The concentration measured at each sampling time did not differ by more than 15% and temperatures were kept constant within ± 0.5°C. Therefore, all validity criteria were met.

Table 1. Water solubility results at 20 °C

	Test item concentration (mg/L)*
Pre-incubation time	24 hours	48 hours	72 hours
Replicate 1	55.3	51.1	56.3
Replicate 2	49.2	55.8	78.7^
Mean	52.3	53.4	56.3
Mean (24 -72h)	54.0
Deviation (%) (24 -72h)	7.7

* Mean value of two injections, dilution factor of 10000 taken into account

^ Determined to be an outlier via Grubbs-test, not taken into account

Conclusions:

The solubility of the test item was determined at 20 ± 0.5 °C to be 54.0 mg/L (pH 6.1) using the flask method.

Executive summary:

The solubility of the test item was determined at 20 ± 0.5 °C to be 54.0 mg/L (pH 6.1) using the flask method. The study is considered reliable without restriction (Klimisch 1) as it was performed according to guidelines OECD 105 and EU A.6, and was GLP-compliant.

Description of key information

The solubility of the test item was determined at 20 ± 0.5 °C to be 54.0 mg/L (pH 6.1) using the flask method.

Key value for chemical safety assessment

Water solubility:

54 mg/L

at the temperature of:

20 °C

Additional information

The key study is considered reliable without restriction (Klimisch 1) as it was performed according to guidelines OECD 105 and EU A.6, and was GLP-compliant.