Phosphorodithioic acid, mixed O,O-bis(iso-Bu and pentyl) esters, zinc salts

Boiling point

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

Test material information

Constituent 1

Reference substance name:

Phosphorodithioic acid, mixed O,O-bis(iso-Bu and pentyl) esters, zinc salts

EC Number:

270-608-0

EC Name:

Phosphorodithioic acid, mixed O,O-bis(iso-Bu and pentyl) esters, zinc salts

Cas Number:

68457-79-4

Molecular formula:

{[(iso-C4H9O)0.64(C5H11O)0.36]PS2}2Zn - neutral, {[(iso-C4H9O)0.64(C5H11O)0.36]PS2}6Zn4O - basic

IUPAC Name:

Phosphorodithioic acid, mixed O,O-bis(iso-Bu and pentyl) esters, zinc salts

Results and discussion

Boiling point

Boiling point 1

Decomposition:

yes

Decomp. temp.:

216 °C

Remarks on result:

other: 67.1% of the test substance decomposes at 216 deg. C

Boiling point 2

Decomposition:

yes

Decomp. temp.:

456 °C

Remarks on result:

other: 3.9% of the test substance decomposes at 456 deg. C

Any other information on results incl. tables

TGA data show there were two thermal events resulting in weight loss associated with sample decomposition. These thermal events occurred at derivative peak values of 216 ⁰C and 456 ⁰C and account for weight losses of 67.1% and 3.9%, respectively. The overall onset of sample weight loss occurred at approx.  211^oC. A residue remained at 600 ⁰C accounting for 29% of the material. A TGA thermograph is attached as Figure 1.

Table 1: Results of TGA Analysis

Derivative Peak (^oC)	% Weight Loss
216	67.1
456	3.9
Residue at  600 ^oC	29.0

     

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 216 C and 456 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. 211 ^oC. There were two main thermal events at derivative peak values of  216 and 456 ^oC corresponding to weight loss values of 67.1 and 3.9%, respectively. A residue remained at  600 ^oC equivalent to 29% of the material.