Phosphorothioic acid, O,O-bis(2-methylpropyl) ester, sodium salt (1:1)

Melting point / freezing point

Administrative data

Endpoint:

melting point/freezing point

Type of information:

experimental study

Adequacy of study:

key study

Study period:

August 18, 2011 - July 7, 2012

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2012

Report date:

2012

Materials and methods

Test guideline

Test guideline 1

Qualifier:

according to guideline

Guideline:

OECD Guideline 102 (Melting point / Melting Range)

Deviations:

no

Test guideline 2

Qualifier:

according to guideline

Guideline:

other: ASTM E794-98

Deviations:

no

Test guideline 3

Qualifier:

according to guideline

Guideline:

EU Method A.1 (Melting / Freezing Temperature)

Deviations:

no

GLP compliance:

no

Type of method:

differential scanning calorimetry

Remarks:

DSC

Test material

Test material information

Constituent 1

Reference substance name:

Sodium O,O-diisobutyl phosphorothioate

EC Number:

610-992-2

Cas Number:

53378-52-2

Molecular formula:

C8 H18 O3 P S . Na

IUPAC Name:

Sodium O,O-diisobutyl phosphorothioate

Test material form:

other: grease-like solid

Specific details on test material used for the study:

- Name of test material (as cited in study report): S10821; AERO® 6697 Promoter distilled
- Name: Sodium diisobutyl monothiophoshate
- CAS: 53378-52-2
- Purity: 87.3%
- Molecular formula: C8H18O3PS.Na
- Molecular weight: 248.26
- Storage condition of test material: not indicated in the study report
- Batch no.: 20154-189-B

Results and discussion

Melting / freezing point

Melting / freezing pt.:

> 115.6 - < 129.8 °C

Atm. press.:

1 013 hPa

Decomposition:

no

Remarks on result:

other: The onset temperature is 115.6 °C.

Any other information on results incl. tables

Melting point / melting range of test substance

Specimen No.	Heating cycle	Onset (melting point) (°C)	Peak temp.(°C)	End temp. (°C)	Melting Range (°C)	Enthalpy (J/g)
1	1	115.6	126.3	129.8	115.6 – 129.8	10.3
2	1	115.6	126.3	129.8	115.6 – 129.8	11.1
1	2	115.6	126.3	129.7	115.6 – 129.7	10.3
2	2	115.6	126.3	129.7	115.6 – 129.7	11.1

*Note that the broad melting point range is indicative of impurities present.

Applicant's summary and conclusion

Conclusions:

Using DSC, according to the OECD 102 and ASTM E794-98 guidelines, the melting temperature range of ther test substance was determined to be 115.6-129.8 °C.

Executive summary:

In this study the melting point of the test material has been measured by a Differential Scanning Calorimetry method (DSC) in accordance with the OECD Testing Guideline 102. Two assays were performed and for each a single endothermic peak was observed. The melting point measured was 115.6 °C.