Phosphorodithioic acid, mixed O,O-bis(2-ethylhexyl and iso-Bu 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:

Between 25 August 2010 and 16 October 2010.

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: see 'Remark'

Remarks:

Study conducted in compliance with agreed protocols, with no or minor deviations from standard test guidelines and/or minor methodological deficiencies, which do not affect the quality of the relevant results. The study report was conclusive, done to a valid guideline and the study was conducted under GLP conditions.

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2010

Report date:

2010

Materials and methods

Test guideline

Test guideline 1

Qualifier:

according to guideline

Guideline:

EU Method A.2 (Boiling Temperature)

Deviations:

no

Test guideline 2

Qualifier:

according to guideline

Guideline:

OECD Guideline 103 (Boiling point/boiling range)

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Type of method:

differential scanning calorimetry

Test material

Test material information

Constituent 1

Reference substance name:

X-3383

IUPAC Name:

X-3383

Details on test material:

Sponsor's identification: X-3383
Description: Pale yellow viscous liquid
Purity: approx. 77 % w/w in mineral oil
Batch/Lot number: Not supplied
Date received: 10 August 2010
Storage conditions: Room temperature in the dark
Expiry date: 06 August 2016

The integrity of supplied data relating to the identity, purity and stability of the test item is the responsibility of the Sponsor.

Results and discussion

Boiling point

Atm. press.:

>= 101.23 - <= 101.56 kPa

Decomposition:

yes

Decomp. temp.:

ca. 473 K

Any other information on results incl. tables

Results

Thermographic data for determinations 1 to 4 are shown in the following tables, respectively.

Thermographic Data – Determination 1

Thermal Event	Interpretation	Temperature
		ºC	K
Shallow rise in the baseline	Approximate onset of decomposition	200	473

Atmospheric pressure: 101.23 kPa

Thermographic Data – Determination 2

Thermal Event	Interpretation	Temperature
		ºC	K
Shallow rise in the baseline	Approximate onset of decomposition	200	473

Atmospheric pressure: 101.23 kPa

Thermographic Data – Determination 3

Thermal Event	Interpretation	Temperature
		ºC	K
Shallow rise in the baseline	Approximate onset of decomposition	200	473

Atmospheric pressure: 101.56 kPa

Thermographic Data – Determination 4

Thermal Event	Interpretation	Temperature
		ºC	K
Shallow rise in the baseline	Approximate onset of decomposition	200	473

Atmospheric pressure: 101.56 kPa

Overall result: Decomposed from approximately 200°C (473 K).

As the test item decomposed, no value for the boiling temperature could be determined experimentally. Please see Attachment "Thermograms" for Thermogram data. Discussion Decomposition of the test item was confirmed using an additional, Siwoloboff-method test, whereupon the test item had become amber/brown in colour by 189°C; at 207°C, the test item had become brown in colour (with a bubble released from the Siwoloboff tube); at 214°C, the test item(and/or decomposition products) had started to boil, with bubbles being released more frequently; at 220°C, the test item (and/or decomposition products) was producing an off-white precipitate and boiling was more vigorous; at 222°C, the test item (and/or decomposition products) erupted from the sample tube, leaving behind an off-white/ beige solid.

As a result of the low rate of enthalpy change during decomposition, the onset temperature can only be approximated.

Similar thermographic profiles were obtained using air and nitrogen atmospheres; this indicates that the observed decomposition in all determinations is probably thermal and not oxidative.

Applicant's summary and conclusion

Conclusions:

The test item has been determined to decompose from approximately 200°C (473 K) at 101.23 to 101.56 kPa. As the test item decomposed, no value for boiling temperature could be determined.

Executive summary:

Method

The determination was carried out by differential scanning calorimetry (DSC) using the procedure specified in ASTM E537-86, designed to be compatible with Method A2 Boiling Temperature ofCommissionRegulation (EC) No 440/2008 of 30 May 2008 and Method 103 of the OECD Guidelines for Testing of Chemicals, 27 July 1995.

Results

Overall result: Decomposed from approximately 200°C (473 K).

As the test item decomposed, no value for the boiling temperature could be determined experimentally. Conclusion The test item has been determined to decompose from approximately 200°C (473 K) at 101.23 to 101.56 kPa. As the test item decomposed, no value for boiling temperature could be determined.