Dipotassium titanate(2-)

Surface tension

Administrative data

Endpoint:

surface tension

Data waiving:

study scientifically not necessary / other information available

Justification for data waiving:

the study does not need to be conducted because surface activity is not a desired property of the material

the study does not need to be conducted because water solubility is below 1 mg/L at 20°C

Cross-reference

Reason / purpose for cross-reference:

data waiving: supporting information

Reference

Endpoint:

water solubility

Type of information:

experimental study

Adequacy of study:

key study

Study period:

21 December 2017 - 6 February 2018

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Reason / purpose for cross-reference:

reference to same study

Qualifier:

according to guideline

Guideline:

EU Method A.6 (Water Solubility)

Version / remarks:

2016

Deviations:

no

Qualifier:

according to guideline

Guideline:

OECD Guideline 105 (Water Solubility)

Version / remarks:

1995

Deviations:

no

Qualifier:

equivalent or similar to guideline

Guideline:

EPA OPPTS 830.7840 (Water Solubility)

Version / remarks:

1998

Deviations:

no

GLP compliance:

yes

Type of method:

column elution method

Key result

Water solubility:

<= 0.041 mg/L

Conc. based on:

test mat. (dissolved fraction)

Incubation duration:

> 16 h

Temp.:

19.6 °C

pH:

>= 7 - <= 7.5

Remarks on result:

other: highest value at any flow rate

Details on results:

The turbidity of the eluates was < 0.2 NTU. According to this, no undissolved particles were detected in the eluates.

The pH of the aqueous samples was 7.0 and 7.5.

Analysed mean concentration in the water sample at flow rate 24 mL/h was 0.0165 mg/L (n=10, CV = 14%).
Analysed mean concentration in the water samples at flow rate 12 mL/h was 0.0148 (n=10, CV = 60%).
Average of two runs: 0.0156 mg/L.
The maximum difference (MD) on the mean values of the samples at both flow rates was ≤ 30%. However, since a high variation between different aliquots (> 30%) was observed, the water solubility was concluded to be ≤ 0.041 mg/L as this was the highest value at any flow rate.

Test item was detected in the samples from the blank column. The maximum contribution to the area of 0.0412 mg/L was ≥ 9.8% at a flow rate of 24 mL/h and ≥ 9.3% at a flow rate of 12 mL/h. This concentration was considered negligible.

Conclusions:

The water solubility of the substance at 20°C was determined to be <=0.041 mg/L.