Reaction mass of 3-phenoxybenzyl (1R,3R)-2,2-dimethyl-3-(2-methylprop-1-en-1-yl)cyclopropanecarboxylate and 3-phenoxybenzyl (1R,3S)-2,2-dimethyl-3-(2-methylprop-1-en-1-yl)cyclopropanecarboxylate (4:1)

Melting point / freezing point

Link to relevant study record(s)

Reference

Reference 1

Endpoint:

melting point/freezing point

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2002

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

OECD Guideline 102 (Melting point / Melting Range)

Qualifier:

according to guideline

Guideline:

EU Method A.1 (Melting / Freezing Temperature)

Qualifier:

according to guideline

Guideline:

other: Technical Guidance Document in Support of the Directive 98/8/EC Concerning the Placing of Biocide! Products on the Market, Part A., Chapter 2, 3.1 " Melting Point ", Final Draft, Version 4.32 October 2000

GLP compliance:

yes (incl. QA statement)

Type of method:

other: combined thermal analysis and capillary method

Key result

Melting / freezing pt.:

-30 °C

A preliminary test was performed to check the approximate freezing temperature of D-PHENOTHRIN. The test item was stored at - 15 °C in a deep freezer. As the sample was not frozen after storage of 27 hours the freezing temperature of D-PHENOTHRIN is below - 15 °C.

During the tests, about 6 ml of the test item placed in a small test tube were cooled down from room temperature to about - 40 °C using a dry ice and acetone mixture.

Two main tests were performed to check the freezing point of D-PHENOTHRIN. At room temperature the test item was clear and the agitator was stirring. The mixtures were cooled down and at -31.4 °C and -28.5 °C, respectively, the viscosity of the samples increased. The change in viscosity is addressed as freezing point.

The determination of the freezing temperature with thermocouples showed no heat effect from which freezing can be deduced. Therefore, the phase transformation was determined visually.

Conclusions:

In conclusion, the freezing temperature/freezing point for D-PHENOTHRIN was determined to be at -30 °C ±1.5 °C which is equal to 243 K ±1.5 K.

Executive summary:

The determination of the freezing point / freezing range of the test item was performed according to the EEC Directive 92/69, A.1 "Melting/Freezing temperature", December 1992 and to the OECD Guideline No. 102: "Melting point / melting range", adopted July 27, 1995 and the Technical Guidance Document.

First, a preliminary test was performed to check the approximate freezing temperature of D-PHENOTHRIN. Then, two main tests were performed to determine the freezing point of D-PHENOTHRIN. At room temperature the test item was clear and the agitator was stirring. The mixtures were cooled down and at -31.4 °C and -28.5 °C, respectively, the viscosity of the samples increased. The change in viscosity is addressed as freezing point. The determination of the freezing temperature with thermocouples showed no heat effect from which freezing can be deduced. Therefore, the phase transformation was determined visually. In conclusion, the freezing temperature/freezing point for D-PHENOTHRIN was determined to be at -30 °C ±1.5 °C.

Reference 2

Endpoint:

melting point/freezing point

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2006

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

EU Method A.1 (Melting / Freezing Temperature)

Qualifier:

according to guideline

Guideline:

other: CIPAC MT 1-freezing point

GLP compliance:

yes (incl. QA statement)

Type of method:

capillary method

Key result

Melting / freezing pt.:

-20 °C

The movement of the glass stirring was more and more difficult until to -20 °C when the sample became a clear compact material. Phenomena of crystallization were noted into the sample from -28 to -32 °C.

Conclusions:

The movement of the glass stirring was more and more difficult until to -20 °C when the sample became a clear compact material.

Executive summary:

The sample was placed in a special test tube and placed in the apparatus for determining the freezing temperature.

The sample was stirred gently and continuously during cooling and the temperature is measured and noted at one-minute intervals.

As soon as the temperature remains constant for some consecutive readings, this temperature should be the freezing temperature. The movement of the glass stirring was more and more difficult until to -20 °C when the sample became a clear compact material. Phenomena of crystallization were noted into the sample from -28 to -32 °C.

Description of key information

Based on the results of two independent experiments, the freezing temperature/freezing point for D-PHENOTHRIN was determined to be at -30 °C ±1.5 °C.

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:

-30 °C