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Water solubility

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Reference
Endpoint:
water solubility
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2018-06-11 to 2018-06-15
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
OECD Guideline 105 (Water Solubility)
Version / remarks:
July 27, 1995
Deviations:
no
Qualifier:
according to guideline
Guideline:
EU Method A.6 (Water Solubility)
Version / remarks:
19 March 2014
Deviations:
no
Qualifier:
according to guideline
Guideline:
EPA OPPTS 830.7840 (Water Solubility)
Version / remarks:
March 1998
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Type of method:
flask method
Specific details on test material used for the study:
SOURCE OF TEST MATERIAL
- Source and lot/batch No.of test material: OUCHI SHINKO CHEMICALS INDUSTRIAL CO., LTD.; 608011
- Expiration date of the lot/batch: August 31, 2018

STABILITY AND STORAGE CONDITIONS OF TEST MATERIAL
- Storage condition of test material: Keep to the storeroom with suitable ventilation. Avoid a fire, direct sunlight and wet. Store at room temperature.
- Stability under test conditions: stable
Key result
Water solubility:
45 mg/L
Conc. based on:
test mat.
Temp.:
20 °C
pH:
> 7.6 - <= 8.3

Regression data

Constant: -368

X Coefficient: 781781

R. Squared: 1.000

Results of the determination of water solubility

The Zinc di(benzimidazol-2-yl) disulphide concentrations were calculated with the help of the calibration equation given above.

Measured concentrations of Zinc di(benzimidazol-2-yl) disulphide are summarised in the table below. The repeatability of the determination was < 15% and thus within the range required by the guidelines.

Sampling time

Measured concentration of Test Item (mg/L )

Measured pH

Test vessels

Mean

24h

44.2

43

7.7

42.5

7.7

42.4

7.6

48h

43.2

46.6

7.9

48.4

7.8

48.2

7.8

72h

45.2

46.7

8.3

46.8

8.2

48.1

8.1

Solubility of the test item (mg/L):

45 ± 5

-

RSD%:

5

-

Conclusions:
A water solubility of 45 ± 5 mg/L at 20 ± 0.5 °C was determined for the test item.
Executive summary:

The water soulbility was determined in accordance with OECD guideline 105 adn EU method A.6 (TOXICOOP, 2018). The shake flask method was used. The water solubility of the test item was determined to be 45 ± 5 mg/L (95% confidence interval) at 20 °C ± 0.5 °C.

Description of key information

A water solubility of 45 ± 5 mg/L at 20 ± 0.5 °C was determined for the test item.

Key value for chemical safety assessment

Water solubility:
45 mg/L
at the temperature of:
20 °C

Additional information

The water solubility was determined in accordance with OECD guideline 105 and EU method A.6 (TOXICOOP, 2018). The shake flask method was used. The water solubility of the test item was determined to be 45 ± 5 mg/L (95% confidence interval) at 20 °C ± 0.5 °C.

The water solubility was additionally calculated using WATERNT v1.01 as part of EPISuite v4.11 from US Environmental Protection Agency. Using WATERNT v1.01 the water solubility of the test item was calculated to be 1772.5 mg/L at 25 °C (EPI Suite, 2014).