Xanthylium, 9-[2-(ethoxycarbonyl)phenyl]-3,6-bis(ethylamino)-2,7-dimethyl-, molybdatesilicate

Partition coefficient

Link to relevant study record(s)

Reference

Reference 1

Endpoint:

partition coefficient

Type of information:

experimental study

Adequacy of study:

supporting study

Study period:

14 Apr 2014

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

test procedure in accordance with national standard methods

Qualifier:

no guideline followed

Principles of method if other than guideline:

- Principle of test: Solubility in n-octanol is determined visually.
- Method
 Prepare sample solutions of 1 and 10mg sample / liter n-octanol 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

Partition coefficient type:

octanol-water

Specific details on test material used for the study:

C.I. Pigment Red 81:5 (CAS 63022-06-0)
Product code: 8135N
Product batch / lot: 021340

Analytical method:

not specified

other: Solubility in n-octanol is determined visually

Type:

log Pow

Partition coefficient:

1

Temp.:

20 °C

pH:

7

Remarks on result:

other:

Remarks:

N-octanol solubility <1 mg/L and water solubility <1 mg/L therefore estimate only provided.

Details on results:

n-octanol solubility was found to be < 1mg/L, with some particles being still undissolved.

Conclusions:

Water - octanol solubility was found to be less than 1mg/L. Hence, it is not possible to detemine the partition coefficient and estimate only provided.

Reference 2

Endpoint:

partition coefficient

Type of information:

calculation (if not (Q)SAR)

Adequacy of study:

key study

Study period:

13 March 2017 - 17 March 2017

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

study well documented, meets generally accepted scientific principles, acceptable for assessment

Qualifier:

equivalent or similar to guideline

Guideline:

other: The described test method is based on regulation (EC) No 440/2008 (test methods pursuant to Regulation (EC) No 1907/2006) section A.6 and OECD guideline 105.

Deviations:

not specified

GLP compliance:

no

Type of method:

flask method

Partition coefficient type:

octanol-water

Specific details on test material used for the study:

C.I. Pigment Red 81:5 (CAS 63022-06-0)
Product code / batch: 8135N / 021340

Analytical method:

not specified

Key result

Type:

log Pow

Partition coefficient:

1

Temp.:

20 °C

pH:

7

Remarks on result:

other:

Remarks:

N-octanol <0.1 mg/L and water solubility<0.1mg/L therefore estimate only provided

Details on results:

The test item n-octanol solubility is < 0.1mg/L and water solubility is <0.1 mg/L therefore the log Pow could not be accurately determined, estimate only provided.

Conclusions:

The test item n-octanol solubility is < 0.1 mg/L and water solubility is <0.1 mg/L therefore the log Pow estimate only provided as log Pow = 1.

Description of key information

The 1-octanol solubility of pigment sample 8135N batch 021340 (C.I. Pigment Red 81:5) was determined to be <0.1mg/L and water solubility was determined as <0.1 mg/L. Therefore the partition coefficient estimate was only provided as log Pow = 1.

Key value for chemical safety assessment

Log Kow (Log Pow):

1

at the temperature of:

20 °C