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Physical & Chemical properties

Melting point / freezing point

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Administrative data

Link to relevant study record(s)

Reference
Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
01.08.1995
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Version / remarks:
92/69/EEC
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Type of method:
method to determine freezing temperature
Key result
Melting / freezing pt.:
< -20 °C
Decomposition:
no
Sublimation:
no

Results

Determination 1

Time (seconds)

Temperature (K)

Observations

0

291

The test material was a clear, colourless, mobile liquid.

30

290

The test material was a clear, colourless, mobile liquid.

60

288

There was no change in the test material.

90

287

There was no change in the test material.

120

285

There was no change in the test material.

150

284

There was no change in the test material.

180

281

There was no change in the test material.

210

278

There was no change in the test material.

240

277

There was no change in the test material.

270

275

There was no change in the test material.

300

273

There was no change in the test material.

330

271

There was no change in the test material.

360

270

There was no change in the test material.

390

269

There was no change in the test material.

420

268

There was no change in the test material.

450

266

There was no change in the test material.

480

264

The test material was slightly opaque.

510

263

There was no change in the test material.

540

262

There was no change in the test material.

570

260

There was no change in the test material.

600

258

There was no change in the test material.

630

257

There was no change in the test material.

660

256

There was no change in the test material.

690

255

There was no change in the test material.

720

254

There was no change in the test material.

750

253

There was no change in the test material.

780

253

A small number of white crystals had formed.

No evidence of solidification or freezing of the test material was observed down to a temperature of 253 K (-20 °C).

Determination 2

Time (seconds)

Temperature (K)

Observations

0

292

The test material was a clear, colourless, mobile liquid.

30

290

There was no change in the test material.

60

289

There was no change in the test material.

90

288

There was no change in the test material.

120

286

There was no change in the test material.

150

285

There was no change in the test material.

180

284

There was no change in the test material.

210

283

There was no change in the test material.

240

282

There was no change in the test material.

270

281

There was no change in the test material.

300

281

There was no change in the test material.

330

279

There was no change in the test material.

360

278

There was no change in the test material.

390

277

There was no change in the test material.

420

276

There was no change in the test material.

450

274

There was no change in the test material.

480

274

The test material was slightly opaque.

510

273

There was no change in the test material.

540

272

There was no change in the test material.

570

272

There was no change in the test material.

600

271

There was no change in the test material.

630

270

There was no change in the test material.

660

270

There was no change in the test material.

690

269

There was no change in the test material.

720

268

There was no change in the test material.

750

267

There was no change in the test material.

780

267

A small number of white crystals had formed.

810

266

There was no change in the test material.

840

265

There was no change in the test material.

870

265

There was no change in the test material.

900

264

There was no change in the test material.

930

264

There was no change in the test material.

960

264

There was no change in the test material.

990

263

The test material was slightly opaque.

1020

263

There was no change in the test material.

1050

263

There was no change in the test material.

1080

262

There was no change in the test material.

1110

262

There was no change in the test material.

1140

262

There was no change in the test material.

1170

261

There was no change in the test material.

1200

261

There was no change in the test material.

1230

261

There was no change in the test material.

1260

260

There was no change in the test material.

1290

260

There was no change in the test material.

1320

260

There was no change in the test material.

1350

259

There was no change in the test material.

1380

259

The test material was opaque.

1410

258

There was no change in the test material.

1440

257

There was no change in the test material.

1470

256

There was no change in the test material.

1500

255

There was no change in the test material.

1530

255

There was no change in the test material.

1560

254

There was no change in the test material.

1590

254

There was no change in the test material.

1620

253

There was no change in the test material.

No evidence of solidification or freezing of the test material was observed down to a temperature of 253 K (-20 °C).

Conclusions:
The freezing temperature of the test item was determined to be below -20 °C.
Executive summary:

A study was conducted according to Regulation (EC) No 92/69 method A.1 to determine the freezing point of the test.Test material was cooled in an acetone/dry-ice bath. The sample was stirred continuously during cooling, and the temperature and observations recorded at 30 second intervals. The determination was performed in duplicate.The test item did not freeze during the course of the test, therefore, the freezing point of the test item was stated to be below -20 °C.

Description of key information

The freezing temperature of the test item was determined to be below -20 °C (reference 4.2-1).

Key value for chemical safety assessment

Additional information

A study was conducted according to Regulation (EC) No 92/69 method A.1 to determine the freezing point of the test. Test material was cooled in an acetone/dry-ice bath. The sample was stirred continuously during cooling, and the temperature and observations recorded at 30 second intervals. The determination was performed in duplicate. The test item did not freeze during the course of the test, therefore, the freezing point of the test item was stated to be below -20 °C.