tert-pentyl peroxypivalate

Partition coefficient

Link to relevant study record(s)

Reference

Endpoint:

partition coefficient

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2013

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

OECD Guideline 117 (Partition Coefficient (n-octanol / water), HPLC Method)

Deviations:

yes

Remarks:

The test- and reference substances were dissolved in methanol

GLP compliance:

no

Type of method:

HPLC method

Partition coefficient type:

octanol-water

Specific details on test material used for the study:

Chemical name: tert-Amyl peroxypivalate
Trade name: Trigonox 125-C75
CAS number: 29240-17-3
Batch/lot no.: 1205442102
Best before: 01-06-2014
Storage until required: -25 °C

Key result

Type:

log Pow

Partition coefficient:

3.3

Temp.:

30 °C

pH:

7

Data retention time and corresponding log k, log K_owdata

Substance	log Kow theor.	Average net retention time (min)	Average log k
Thiourea		0
Aniline	0.9	0.46	-0.53
Methyl benzoate	2.1	1.55	0.00
Bromobenzene	3.0	3.69	0.38
Phenantrene	4.5	12.19	0.90
Fluoranthene	5.1	18.74	1.08
4,4'-DDT	6.5	32.12	1.32
tert-Amyl peroxypivalate		3.81	0.40

Conclusions:

The log Kow was determined to be 3.3

Executive summary:

The partition coefficient n-octanol/water (K_ow) of tert-Amyl peroxypivalate was estimated using the High Performance Liquid Chromatography (HPLC) method. The Kow test was performed in accordance with the OECD guideline 117 with a modification, the test- and reference substances were dissolved in methanol. In the test, the average measured Log Kow value for tert-Amyl peroxypivalate was calculated with the retention time from two injections, using the calibration plot of Log k versus Log Kow of the selected reference substances. The average measured Log Kow value for tert-Amyl peroxypivalate, as determined from the test, was 3.3. tert-Amyl peroxypivalate had a Kow of 2.0E+03.

Description of key information

The partition coefficient log Kow value for tert-amyl peroxypivalate is 3.3.

Key value for chemical safety assessment

Log Kow (Log Pow):

3.3

at the temperature of:

30 °C

Additional information

The partition coefficient n-octanol/water (K_ow) of tert-Amyl peroxypivalate was estimated using the High Performance Liquid Chromatography (HPLC) method. The Kow test was performed in accordance with the OECD guideline 117 with a modification, the test- and reference substances were dissolved in methanol. In the test, the average measured Log Kow value for tert-Amyl peroxypivalate was calculated with the retention time from two injections, using the calibration plot of Log k versus Log Kow of the selected reference substances. The average measured Log Kow value for tert-Amyl peroxypivalate, as determined from the test, was 3.3. tert-Amyl peroxypivalate had a Kow of 2.0E+03.