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Physical & Chemical properties

Melting point / freezing point

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Reference
Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
Between 07 January 2009 and 17 April 2009.
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: 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.
Reference:
Composition 0
Qualifier:
according to
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Deviations:
no
Qualifier:
according to
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Deviations:
no
Qualifier:
according to
Guideline:
other: BS4633: Method for the Determination of Crystallizing Point.
Deviations:
no
GLP compliance:
yes (incl. certificate)
Remarks:
Date of inspection: 19th August 2008 Date of signature: 4th March 2009 :
Type of method:
method to determine freezing temperature
Remarks:
dry ice/acetone bath
Test material information:
Composition 1
Key result
Melting / freezing pt.:
< 253 K
Atm. press.:
ca. 1 013 hPa

Cooling data for Determinations 1 and 2 are shown in the following tables:

Table 1: Determination 1

Time(s)

Temperature (K)

Time(s)

Temperature (K)

0

293

1140

259

30

293

1170

259

60

292

1200

258

90

290

1230

258

120

288

1260

258

150

286

1290

258

180

285

1320

258

210

285

1350

257

240

283

1380

257

270

281

1410

257

300

280

1440

257

330

279

1470

257

360

277

1500

257

390

277

1530

256

420

275

1560

256

450

273

1590

256

480

272

1620

256

510

271

1650

256

540

270

1680

256

570

269

1710

256

600

269

1740

255

630

268

1770

255

660

267

1800

255

690

267

1830

255

720

266

1860

255

750

266

1890

255

780

265

1920

254

810

264

1950

254

840

263

1980

254

870

263

2010

254

900

262

2040

254

930

262

2070

253

960

261

2100

253

990

261

2130

253

1020

260

2160

253

1050

260

2190

252

1080

260

2220

252

1110

259

2250

252

Observations:           The test material became increasingly viscous during cooling.
Result:                       Freezing temperature <253 K

Table 2: Determination 2

Time(s)

Temperature (K)

Time(s)

Temperature (K)

0

294

1140

260

30

293

1170

260

60

293

1200

260

90

292

1230

259

120

290

1260

259

150

287

1290

259

180

286

1320

258

210

284

1350

258

240

283

1380

258

270

281

1410

258

300

279

1440

258

330

278

1470

258

360

278

1500

258

390

277

1530

257

420

275

1560

257

450

273

1590

257

480

272

1620

257

510

271

1650

257

540

270

1680

256

570

269

1710

256

600

269

1740

256

630

268

1770

255

660

267

1800

255

690

267

1830

255

720

266

1860

254

750

266

1890

254

780

265

1920

254

810

264

1950

254

840

263

1980

254

870

263

2010

253

900

262

2040

253

930

262

2070

253

960

262

2100

253

990

261

2130

252

1020

261

2160

252

1050

261

2190

252

1080

261

2220

252

1110

260

2250

251

Test conducted under atmospheric pressure condition, decomposition/sublimation, as well as decomposition /sublimation temperature is not specified.

Conclusions:
The freezing temperature of the test material has been determined to be less than 253 K at ambient pressure.
Executive summary:

Melting/Freezing Temperature. Determined to be less than 253 K, using BS4633: Method for the Determination of Crystallizing Point, Method A.1 Melting/Freezing Temperature of Commission Regulation (EC) No 440/2008 of 30 May 2008 and Method 102 of the OECD Guidelines for Testing of Chemicals, 27 July 1995.

Description of key information

The melting/freezing temperature of the substance was determined to be < -20 °C (< 253 K) at ambient atmospheric pressure according to OECD Guideline 102. 

Key value for chemical safety assessment

Additional information

A dry ice/acetone bath equipped with a thermometer was used to determine the properties of the substance at temperatures down to -20 °C. Temperature and observations of the test material were recorded approximately every 30 seconds. During cooling, the substance became increasingly viscous. Freezing was not observed down to -20 °C, therefore the freezing temperature of the substance is < -20 °C (< 253 K) at ca. 1013 hPa.