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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:
2009-11-09 to 200-02-26
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: The study was conducted according to OECD 102 test guideline, and in compliance with GLP.
Qualifier:
according to guideline
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Deviations:
no
Qualifier:
according to guideline
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Type of method:
method to determine freezing temperature
Key result
Melting / freezing pt.:
253 K
Decomposition:
no
Sublimation:
no

Results

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

Determination 1

Time(s)

Temperature (K)

Time(s)

Temperature (K)

0

294

930

265

30

293

960

264

60

292

990

263

90

291

1020

263

120

290

1050

262

150

289

1080

261

180

288

1110

260

210

287

1140

260

240

286

1170

259

270

285

1200

259

300

284

1230

258

330

283

1260

258

360

282

1290

258

390

281

1320

257

420

281

1350

257

450

280

1380

256

480

279

1410

256

510

278

1440

256

540

278

1470

255

570

277

1500

255

600

275

1530

255

630

274

1560

254

660

273

1590

254

690

272

1620

254

720

271

1650

254

750

270

1680

253

780

269

1710

253

810

268

1740

253

840

267

1770

253

870

266

1800

253

900

266

1830

252

Observations:           The test material became increasingly viscous during cooling

Result:                       Freezing temperature <253 K (-20.15 C)


Determination 2

Time(s)

Temperature (K)

Time(s)

Temperature (K)

0

294

840

263

30

293

870

263

60

292

900

262

90

291

930

262

120

289

960

261

150

288

990

261

180

287

1020

260

210

285

1050

259

240

284

1080

258

270

283

1110

258

300

282

1140

258

330

281

1170

258

360

280

1200

258

390

279

1230

257

420

278

1260

257

450

277

1290

257

480

276

1320

257

510

275

1350

256

540

274

1380

256

570

273

1410

255

600

272

1440

255

630

271

1470

254

660

270

1500

254

690

268

1530

253

720

267

1560

253

750

266

1590

253

780

265

1620

253

810

264

1650

252

Observations:          The test material became increasingly viscous during cooling

Result:                       Freezing temperature <253 K (-20.15 C)

Observation: The test material became increasingly viscous during cooling

Conclusions:
A Freezing temperature value of less than 253 ± 0.5°K (-20.15°C) was determined in a reliable study conducted according to OECD 102, and in compliance with GLP.

Description of key information

Freezing Temperature: <253 K (-20.15°C) OECD 102

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
253 K

Additional information

A freezing temperature of <253 K (-20.15°C) has been determined for the test substance in a reliable study conducted in accordance to OECD 102. The substance was observed to become increasingly viscous during cooling.