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Reference
Endpoint:
auto-ignition temperature (liquids)
Type of information:
experimental study
Adequacy of study:
key study
Study period:
17 Jan to 14 Dec 2016
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
EU Method A.15 (Auto-Ignition Temperature (Liquids and Gases))
GLP compliance:
yes (incl. certificate)
Remarks:
Groupe Interministerial des Produits Chimiques, 67 rue Barbes, 94201 Ivry-sur Seine
Auto-ignition temperature:
> 372 - < 378 °C
Atm. press.:
980 hPa

Preliminary test

Volume of test item injected in the oven = 70 µL

 

Temperature of the assay (°C)

Auto-ignition

Maximal temperature of the air recorded in the centre of the test flask after auto-ignition (°C)

Atmospheric pressure (kPa)

Relative humidity (%)

Assay No.

Observed

Corrected

Y / N

Lag(s)

Observed

Corrected

1

102

103

No

/

/

/

97.6

43

2

150

151

No

/

/

/

97.8

51

3

200

201

No

/

/

/

97.7

50

4

248

249

No

/

/

/

97.7

50

5

301

302

No

/

/

/

97.6

49

6

347

348

No

/

/

/

97.5

48

7

402

403

Yes

2

435

436

97.5

49

8

374

375

No

/

/

/

97.7

56

9

384

385

Yes

4

403

404

97.6

54

 

The auto-ignition temperature was situated between 375°C and 385°C (corrected values). This range is given for information, the final result is given by the main test in following section.

Main test

Volume of test item injected in the oven = 70 µL

Only the runs with an auto-ignition observed for each assay are summarised in the following table:

 

Auto-ignition temperature (°C)

Auto-ignition

Maximal temperature of the air recorded in the centre of the test flask after ignition (°C)

Atmospheric pressure (kPa)

Relative humidity (%)

Assay No.

Observed

Corrected

Lag (s)

Observed

Corrected

1

375

376

3

382

383

97.7

45

2

374

375

4

390

391

97.7

33

3

374

375

4

397

398

98.1

48

4

376

377

3

398

399

98.0

48

5

376

377

2

389

390

98.0

49

 

Conclusion

The auto-ignition temperature of the test item was 375°C ± 3°C (corrected temperature).

Conclusions:
An auto-ignition temperature of 375 +/-3 °C at 980 hPa was determined in a reliable study conducted according to an appropriate test protocol.

Description of key information

[3-(trimethoxysilyl)propyl]urea: 375 +/- 3°C at 980 hPa (measured)

Key value for chemical safety assessment

Additional information

An auto-ignition temperature of 375 +/-3 °C at 980 hPa was obtained for the parent substance according to EU test method A.15.