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Physical & Chemical properties

Water solubility

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Reference
Endpoint:
water solubility
Type of information:
experimental study
Adequacy of study:
key study
Study period:
Mar 04 - May 30, 2017
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
OECD Guideline 105 (Water Solubility)
GLP compliance:
no
Type of method:
column elution method
Water solubility:
< 12.1 µg/L
Temp.:
20 °C
pH:
6.3

After substraction of the blank value:

Flow rate [mL/h]

Fraction No.

Volume of combined fractions [mL]

IS [µg/L]

Solubility of test item [µg/L]

 

 

 

 

12.5

1 (1-2)

20

107.91

<12.10

 

2 (3-4)

20

 107.91

 <12.10

 

3 (5-6)

20

 107.91

 <12.10

 

4 (7-8)

20

 107.91

 <12.10

 

5 (9-10)

20

 107.91

 <12.10

 

6 (11-12)

20

 107.91

 <12.10

 

7 (13-14)

20

 107.91

 <12.10

 

8 (15-16)

20

 107.91

 <12.10

 

 

 

 

 

 

6.25

1 (1-2)

20

 107.91

 <12.10

 

2 (3-4)

20

 107.91

 <12.10

 

3 (5-6)

20

 107.91

 <12.10

 

4 (7-8)

20

 107.91

 <12.10

 

5 (9-10)

20

 107.91

 <12.10

 

6 (11-12)

20

 107.91

 <12.10

 

7 (13-14)

20

 107.91

 <12.10

 

8 (15-16)

20

 107.91

 <12.10

Determination of the water solubility at both flow rates yielded values below the limit of quantification (LOQ).

The WS was determined at 20 °C. The pH value of the collected aqueous fractions was 6.3.

Working range:

The calibration curve fits over a range from 4.03 µg/L to 1008.10 µg/L (monoglyceride) or 12.10 µg/L to 1008.10 µg/L (di- and triglyceride), respectively. For each calibration curve a linear fit was used with r2 = 0.998 (monoglyceride), r2 = 0.997(diglyceride) and r2 = 1.000 (triglyceride), respectively.

recovery:

recovery wa measured in duplicate at two concentration. For the lower concentration (202.62 µg/L) average recovery rates of 97.2% (monoglyceride), 82.5% (diglyceride) and 139.6% (triglyceride) were determined. For the higher concentration (403.24 µg/L) average recovery rates of 105.7% (monoglyceride), 103.5% (diglyceride) and 134.9% (triglyceride) were determined.

Description of key information

<12.1 µg/L at 20 °C and pH 6.3 (OECD 105, column elution method)

Key value for chemical safety assessment

Additional information