Phosphorodithioic acid, mixed O,O-bis(1,3-dimethylbutyl and iso-Pr) 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(1,3-dimethylbutyl and iso-Pr) esters, zinc salts

EC Number:

283-392-8

EC Name:

Phosphorodithioic acid, mixed O,O-bis(1,3-dimethylbutyl and iso-Pr) esters, zinc salts

Cas Number:

84605-29-8

Molecular formula:

Not applicable

IUPAC Name:

Phosphorodithioic acid, mixed O,O-bis(1,3-dimethylbutyl and iso-Pr) esters, zinc salts

Constituent 2

Reference substance name:

Zinc, O,O-mixed (1-methylethyl), (1,3-dimethylbutyl) phosphorodithioate

IUPAC Name:

Zinc, O,O-mixed (1-methylethyl), (1,3-dimethylbutyl) phosphorodithioate

Results and discussion

Boiling point

Decomposition:

yes

Decomp. temp.:

195 °C

Remarks on result:

other: 93.2% of the test substance decomposes at 195 deg. C

Any other information on results incl. tables

TGA data show there was one thermal event resulting in weight loss associated with sample decompositon. This event occurred at a derivative peak value of 195 ⁰C, and corresponds to a weight loss of 93.2%. The overall onset of sample weight loss occurred at approx. 187 ⁰C.  A residue remained at 600 ⁰C accounting for 6.8 % of the material. A TGA thermograph is attached as Figure 1.

Table 1. Results of TGA Analysis

Derivative Peak (^oC)	% Weight Loss
195	93.2
Residue at 600 ^oC	6.8

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 a temperature of 195 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. 187 ^oC. There was one  main thermal event at a derivative peak value of  195  ^oC corresponding to a weight loss value of 93.2 %. A residue remained at  600 ^oC equivalent to 6.8 % of the material.