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Partition coefficient
Administrative data
Link to relevant study record(s)
- Endpoint:
- partition coefficient
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- January 21, 2015 - January 22, 2015
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.8 (Partition Coefficient)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 117 (Partition Coefficient (n-octanol / water), HPLC Method)
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- HPLC method
- Partition coefficient type:
- octanol-water
- Analytical method:
- high-performance liquid chromatography
- Key result
- Type:
- log Pow
- Partition coefficient:
- 4.7
- Temp.:
- 25 °C
- pH:
- 5.8
- Conclusions:
- The partition coefficient n-octanol/water of the test item Disperse Yellow DYLA 1306 was found to be 4.7
- Executive summary:
The partition coefficient n-octanol/water of the test item Disperse Yellow DYLA 1306 was determined according to the HPLC method described in the European Commission Regulation (EC) No. 440/2008.
It was found to be:
log POW= 4.7
Reference
Results:
Table 2: Determination of the dead time t0
Dead time marker |
tR / min 1. measurement |
tR / min 2. measurement |
tR / min |
Formamide |
2.51 |
2.51 |
2.51 |
Dead time: t0 = 2.51 min
Table 3: Calibration data 1st injection
Calibration substance |
tR / min |
k |
log k |
log POW 1) |
4-Acetylpyridine |
2.88 |
0.15 |
-0.83 |
0.5 |
Benzonitrile |
3.46 |
0.38 |
-0.42 |
1.6 |
4-Chloroaniline |
3.60 |
0.44 |
-0.36 |
1.8 |
Atrazine |
4.87 |
0.94 |
-0.03 |
2.6 |
2,3-Dichloroaniline |
4.93 |
0.97 |
-0.01 |
2.8 |
Diphenylamine |
7.50 |
1.99 |
0.30 |
3.4 |
2,6-Diphenylpyridine |
19.51 |
6.78 |
0.83 |
4.9 |
Triphenylamine |
43.46 |
16.33 |
1.21 |
5.7 |
1)OECD guideline 117, adopted 2004
Regression:
Parameters: a = 2.692
b = 2.553
r2= 0.9978
Table 4: log POW of the test item – 1st injection
Test item |
tR/ min |
k |
log k |
log POW |
Disperse Yellow DYLA 1306 |
18.27 |
6.29 |
0.80 |
4.7 |
Table 5: Calibration data 2nd injection
Calibration substance |
tR / min |
k |
log k |
log POW 4) |
4-Acetylpyridine |
2.88 |
0.15 |
-0.83 |
0.5 |
Benzonitrile |
3.45 |
0.38 |
-0.42 |
1.6 |
4-Chloroaniline |
3.59 |
0.43 |
-0.36 |
1.8 |
Atrazine |
4.86 |
0.94 |
-0.03 |
2.6 |
2,3-Dichloroaniline |
4.92 |
0.96 |
-0.02 |
2.8 |
Diphenylamine |
7.49 |
1.99 |
0.30 |
3.4 |
2,6-Diphenylpyridine |
19.51 |
6.78 |
0.83 |
4.9 |
Triphenylamine |
43.56 |
16.37 |
1.21 |
5.7 |
4)OECD guideline 117, adopted 2004
Regression:
Parameters: a = 2.697
b = 2.547
r2= 0.9978
Table 6: log POWof the test item – 2nd injection
Test item |
tR/ min |
k |
log k |
log POW |
Disperse Yellow DYLA 1306 |
18.34 |
6.31 |
0.80 |
4.7 |
Description of key information
The partition coefficient of the test item was determined by the HPLC method according to the European Commission Regulations (EC) No. 440/2008,
A.8. partition coefficient n-octanol/water and according to the OECD test guideline, OECD 117, HPLC Method.
Key value for chemical safety assessment
- Log Kow (Log Pow):
- 4.7
- at the temperature of:
- 25 °C
Additional information
The partition coefficient n-octanol/water of the test item Disperse Yellow DYLA 1306 was determined according to the HPLC method described in the European Commission Regulation (EC) No. 440/2008.
It was found to be:
log POW= 4.7
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