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Administrative data

Endpoint:
additional ecotoxicological information
Type of information:
experimental study
Adequacy of study:
supporting study
Study period:
April 2011
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Study is a research based experiment, not conducted to GLP, Not conducted to a standard guideline. Considered reliable with restrictions.

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2012
Report date:
2012

Materials and methods

Test guideline
Qualifier:
no guideline available
Principles of method if other than guideline:
Degradation of the test material in water and identification and quantification where possible of the formed degradation products.
GLP compliance:
no

Test material

Constituent 1
Chemical structure
Reference substance name:
Bisisobutyryl peroxide
EC Number:
222-340-0
EC Name:
Bisisobutyryl peroxide
Cas Number:
3437-84-1
Molecular formula:
C8H14O4
IUPAC Name:
2-methylpropanoyl 2-methylpropaneperoxoate
Constituent 2
Reference substance name:
Bisisobutryl peroxide
IUPAC Name:
Bisisobutryl peroxide
Test material form:
gas under pressure: refrigerated liquefied gas
Details on test material:
Trade name Trigonox 187-C30
Chemical description Diisobutyryl peroxide, 30% solution in isododecane
IUPAC name Diisopropylperoxyanhydride
Chemical name Diisobutyryl peroxide
EC name Bisisobutyryl peroxide
EC number 222-340-0
CAS number 3437-84-1
Batch number 1101447007

Molecular formula C8H14O4
Molecular weight 174.1944 g/mol
Description Colourless clear liquid
Smiles notation CC(C)C(=O)OOC(=O)C(C)C

Storage requirements Store in accordance with local/national regulations. Keep away from food, drink and animal feeding stuffs. Store in a dry well ventilated place away from sources of heat and direct sunlight. Store separate from other chemicals. Keep only in the original container. Keep container upright to prevent leakage.
For maximum quality store below: -20 °C.
For safety, store below -20 °C.
Expiration date 08/01/2011 (month/day/year)

Results and discussion

Any other information on results incl. tables

Results Raw Data

Exp

Time

% m/m

No.

sec

min.

Trigonox 187

IsoBAcid

IPA

propene

acetone

1

544

9.1

0.0213

0.0077

0.0036

0.0006

0.0002

2

795

13.3

0.0154

0.0099

0.0041

0.0008

0.0003

3

1016

16.9

0.0116

0.0122

0.0059

0.0011

0.0002

4

1214

20.2

0.0086

0.0131

0.0072

0.0013

0.0002

5

1574

26.2

0.0063

0.0139

0.0071

0.0015

0.0002

6

1831

30.5

0.0039

0.0162

0.0071

0.0015

0.0003

7

2089

34.8

0.0024

0.0149

0.0071

0.0016

0.0003

8

2346

39.1

0.0022

0.0152

0.0085

0.0017

0.0002

9

2604

43.4

0.0015

0.0156

0.0085

0.0016

0.0003

10

2861

47.7

0.0016

0.0172

0.0084

0.0017

0.0002

11

3119

52.0

0.0006

0.0170

0.0081

0.0017

0.0003

12

3376

56.3

0.0005

0.0163

0.0084

0.0017

0.0002

13

3634

60.6

0.0000

0.0164

0.0081

0.0016

0.0003

Several degradation products are detected: Isobutyric acid (isoBAcid), isopropylalcohol (IPA), propene, and acetone. The amounts of these compounds and the rest peroxide (Trigonox 187, abbreviated as Tx-187 in the spectrum) were calculated using acetic acid (peak) as internal standard.

Applicant's summary and conclusion

Conclusions:
For the degradation of Diisobutryl peroxide in water it can be concluded that:

- Diisobutryl peroxide decomposes completely in water after 60 minutes at 27°C (room temperature).
- The decomposition products observed are: Isobutyric acid (IBA), Isopropanol, propene and acetone.
- The main decomposition/hydrolysis product found is Isobutyric acid.
- Propene is also likely to be one of the main decomposition products but the exact amount can not be determined due to its high volatile nature.

Executive summary:

The test material concerned decomposes to a mixture of decomposition products that were identified and quantified during this experiment. The study was a non standard research based investigation. No guideline was followed and no GLP accreditation was given. Due to the specialist and complex nature of the measurments these results are considered to have limitations but are considered reliable with the resrictions mentioned.