Xanthylium, 3,6-bis(diethylamino)-9-[2-(ethoxycarbonyl)phenyl]-, molybdatetungstatephosphate

Water solubility

Link to relevant study record(s)

Reference

Reference 1

Endpoint:

water solubility

Type of information:

experimental study

Adequacy of study:

key study

Study period:

30 Aug 2016

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

test procedure in accordance with national standard methods with acceptable restrictions

Qualifier:

no guideline followed

Principles of method if other than guideline:

Prepare sample solutions of 1 and 10 mg sample / liter water in volumetric flaks with stoppers.
- Add a magnetic stirring element to both volumetric flasks
- Place both flasks under stirring in a temperature controlled heating bath at 30°C for at least 72h
- After 72h, place both flasks under stirring in a temperature controlled heating bath at 20 ± 0.5°C for at least 24h
- Visually verify for undissolved particles

GLP compliance:

not specified

Type of method:

flask method

Specific details on test material used for the study:

Product code: 0245F
Product batch / lot: 280PE 310516

Key result

Water solubility:

< 0.001 g/L

Conc. based on:

test mat. (total fraction)

Incubation duration:

> 24 h

Temp.:

20 °C

pH:

7

Remarks on result:

other:

Remarks:

pH not specified therefore assumed to be neutral (pH 7)

Conclusions:

Water solubility is < 0.001 g/L

Reference 2

Endpoint:

water solubility

Type of information:

experimental study

Adequacy of study:

key study

Study period:

28 Mar 2017 - 25 Apr 2017

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

test procedure in accordance with generally accepted scientific standards and described in sufficient detail

Qualifier:

according to guideline

Guideline:

OECD Series on Testing and Assessment No. 29 (23-Jul-2001): Guidance document on transformation/dissolution of metals and metal compounds in aqueous media

Deviations:

no

GLP compliance:

not specified

Type of method:

flask method

Specific details on test material used for the study:

Product batch / lot: 0245F / 280PE310516

Key result

Water solubility:

< 1 mg/L

Conc. based on:

test mat.

Incubation duration:

28 d

Temp.:

19.5 °C

pH:

7

Remarks on result:

not determinable

Conclusions:

The goal of this study was to determine the solubility and released elements of C.I. Pigment Violet 2 (CAS 1326-04-1) when exposed during 28 days at pH7.
After exposure of the pigment sample for 28 days at pH7 and a loading rate of 1 mg/L, traces of tungsten and molybdenum were detected in all sample filtrates. None of the filtrates were found to contain phosphor (less than quantification limit of 10 µg/L). Undissolved pigment particles are clearly visible on the filtrate membranes demonstrating solubility of Pigment Violet 2 at pH7 to be far less than 1 mg/L.

Reference 3

Endpoint:

water solubility

Type of information:

experimental study

Adequacy of study:

supporting study

Study period:

16 Feb 2017 - 17 Feb 2017

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

test procedure in accordance with generally accepted scientific standards and described in sufficient detail

Qualifier:

equivalent or similar to guideline

Guideline:

OECD Series on Testing and Assessment No. 29 (23-Jul-2001): Guidance document on transformation/dissolution of metals and metal compounds in aqueous media

Deviations:

not specified

GLP compliance:

not specified

Type of method:

flask method

Specific details on test material used for the study:

Product batch / lot: 0245F / 280PE310516

Water solubility:

< 1 mg/L

Conc. based on:

test mat.

Incubation duration:

> 24 h

Temp.:

37 °C

pH:

1

Conclusions:

The goal of this study was to determine the solubility and released elements of C.I. Pigment Violet 2 (CAS 1326-04-1) when exposed during at least 24 hours at pH1.
After exposure of the pigment sample for more than 24 hours at pH1 and a loading rate of 1 mg/L, minor traces of phosphor were detected in 1 of the 3 filtrates. None of the filtrates were found to contain tungsten or molybdenum (less than quantification limit of 10 µg/L).
Undissolved pigment particles are clearly visible on the filtrate membranes demonstrating solubility of Pigment Violet 2 at pH1 to be far less than 1mg/L.

Reference 4

Endpoint:

water solubility

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

EU Method A.6 (Water Solubility)

Qualifier:

according to guideline

Guideline:

OECD Guideline 105 (Water Solubility)

GLP compliance:

no

Type of method:

flask method

Specific details on test material used for the study:

Product code: 0245F
batch: 280PE 310516

Key result

Water solubility:

< 0.1 mg/L

Conc. based on:

test mat.

Incubation duration:

> 24 h

Temp.:

20 °C

pH:

5.76

Conclusions:

When inspecting the Stericup-GV membrane, pigment particles are clearly visible. The filtrate
is clear and not coloured.
Based on the visual observation of the sample solution and filter membrane, the water
solubility of pigment sample 0245F batch 280PE310516 (C.I. Pigment Violet 2, CAS 1326-
04-1) is determined to be <0.1mg/L.

Key value for chemical safety assessment

Water solubility:

0.1 mg/L

at the temperature of:

20 °C