Registration Dossier

Administrative data

Endpoint:
boiling point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2009
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: The study was performed according to guideline

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2009
Report date:
2009

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
other: ASTM E2550-07 Standard Test Method for Thermal Stability by Thermogravimetry
Deviations:
no
GLP compliance:
no
Remarks:
ISO 9001/2000 Certified
Type of method:
other: thermogravimetric

Test material

Constituent 1
Chemical structure
Reference substance name:
Zinc bis[O,O-bis(2-ethylhexyl)] bis(dithiophosphate)
EC Number:
224-235-5
EC Name:
Zinc bis[O,O-bis(2-ethylhexyl)] bis(dithiophosphate)
Cas Number:
4259-15-8
Molecular formula:
Too complex
IUPAC Name:
1-Hexanol, 2-ethyl-, O,O-diester with phosphorodithioic acid, zinc salt

Results and discussion

Boiling pointopen allclose all
Decomposition:
yes
Decomp. temp.:
222 °C
Remarks on result:
other: 60.3 % of the test material decomposes at 222 deg. C
Decomposition:
yes
Decomp. temp.:
264 °C
Remarks on result:
other: 10.6 % of the test material decomposes at 264
Decomposition:
yes
Decomp. temp.:
394 °C
Remarks on result:
other: 5.2 % of the test material decomposes at 394 deg. C

Any other information on results incl. tables

TGA data show three thermal events resulting in weight loss associated with sample decomposition. These thermal events occurred at derivative peak values of 222 0C, 264 0C and 394 0C corresponding to weight losses of  60.3, 10.6 and 5.2 %, respectively. The overall onset of sample weight loss occurred at approx. 220oC.  A residue remained at 600 0C accounting for 23.2% of the material. Residual solvent accounted for 0.7% weight loss and was observed < 100 deg. C. A TGA thermograph is attached as Figure 1.

Table 1: Results of TGA Analysis

Derivative Peak (oC)

% Weight Loss

222

60.3

264

 10.6

394

  5.2

Residue at 600oC

23.2

Applicant's summary and conclusion

Conclusions:
Analysis by TGA indicates the test substance decomposes before boiling. The test material showed weight loss associated with decomposition at temperatures of 222, 264 and 394 deg. C
Executive summary:

A thermogravimetric analysis performed according to the ASTM E2550 -07 guideline indicates the test substance decomposes before boiling.

The test material was heated under nitrogen up to  600 oC. Examination of the TGA curve shows that weight loss associated with sample decomposition occurred. The onset of weight loss occurred at approx. 220 oC. There were  three  main thermal events at derivative peak values of  222, 264 and  394 oC corresponding to weight loss values of  60.3, 10.6 and 5.2 %, respectively. A residue remained at  600 oC equivalent to 23.2% of the material. Residual solvent accounted for and additional 0.7% weight loss and occurred at < 100 oC.

.