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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:
09 Apr - 21 Jun 2014
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Version / remarks:
27 July 1995
Deviations:
no
Qualifier:
according to
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Version / remarks:
30 May 2008
Deviations:
no
GLP compliance:
yes (incl. certificate)
Remarks:
The Department of Health of the Government of the United Kingdom
Type of method:
capillary method
Remarks:
melting temperature devices with liquid bath
Key result
Melting / freezing pt.:
< -20 °C
Atm. press.:
1 013 hPa
Remarks on result:
other: Atmospheric pressure not reported, experiment assumed to be done at ambient conditions.
Key result
Melting / freezing pt.:
< 253 K
Atm. press.:
1 013 hPa
Remarks on result:
other: Atmospheric pressure not reported, experiment assumed to be done at ambient conditions.

Cooling data for Determinations 1 and 2 are shown in Table 1 and Table 2 below. The graphs of temperature (K) versus time (s) for Determinations 1 and 2 are attached.

Table 1: Determination 1

Time [s]

Temperature [K]

Time [s]

Temperature [K]

Time [s]

Temperature [K]

0

293.7

540

272.2

1080

259.7

30

291.7

570

270.7

1110

259.2

60

291.2

600

269.7

1140

258.7

90

290.7

630

268.7

1170

258.2

120

290.2

660

267.7

1200

257.7

150

289.7

690

267.2

1230

257.2

180

289.2

720

266.2

1260

256.7

210

288.2

750

265.7

1290

256.2

240

286.2

780

265.2

1320

255.7

270

283.2

810

264.7

1350

255.7

300

281.2

840

264.2

1380

255.2

330

280.2

870

263.2

1410

254.7

360

279.7

900

262.7

1440

254.2

390

277.2

930

262.2

1470

253.7

420

276.2

960

262.2

1500

253.2

450

274.7

990

261.2

1530

252.7

480

273.7

1020

260.7

1560

252.2

510

273.2

1050

260.2

-

-

Observation: No change in test item during testing

Result: Freezing temperature <-20°C (<253 K)

Table 2: Determination 2

Time [s]

Temperature [K]

Time [s]

Temperature [K]

Time [s]

Temperature [K]

0

294.7

510

272.2

1020

258.2

30

293.7

540

270.7

1050

257.7

60

291.7

570

270.2

1080

257.2

90

290.2

600

269.2

1110

256.7

120

288.7

630

268.7

1140

256.2

150

287.2

660

268.2

1170

255.7

180

285.7

690

266.7

1200

255.2

210

283.2

720

265.7

1230

254.7

240

281.7

750

265.2

1260

254.2

270

281.2

780

264.7

1290

254.2

300

280.7

810

263.7

1320

253.7

330

279.2

840

262.7

1350

253.2

360

278.2

870

261.7

1380

253.2

390

276.2

900

260.7

1410

252.7

420

275.2

930

259.7

1440

252.7

450

274.2

960

258.7

1470

252.7

480

273.2

990

258.7

1500

252.2

Observation: No change in test item during testing

Result: Freezing temperature <-20°C (<253 K)

Neither of the samples froze under the conditions of the test

Conclusions:
A freezing temperature of <-20°C (<253 K) at 1013 hPa was determined for the substance using a relevant test method and in compliance with GLP. The result is considered to be reliable.

Description of key information

Freezing temperature <-20°C (<253 K) (OECD 102)

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
-20 °C

Additional information

A freezing temperature value of <-20°C (<253 K) at 1013 hPa was determined for the submission substance using a capillary method (melting temperature device with liquid bath) in accordance with OECD Test Guideline 102 and in compliance with GLP. The result is considered to be reliable.