[3-(2,3-epoxypropoxy)propyl]trimethoxysilane

Auto flammability

Link to relevant study record(s)

Reference

Endpoint:

auto-ignition temperature (liquids)

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2019-05-06

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

EU Method A.15 (Auto-Ignition Temperature (Liquids and Gases))

Deviations:

yes

Remarks:

For EC A.15. test, the empty part (gaseous phase of the test item) of the flask exceeded 15% of its total capacity. This deviation was not considered to have affected the quality or the interpretation of the results obtained

GLP compliance:

yes (incl. QA statement)

Key result

Auto-ignition temperature:

236 °C

Atm. press.:

ca. 97.7 - ca. 98.4 kPa

Results

Preliminary test

Injection No.	Volume of test item injected in the oven (µL)	Temperature (°C)		Auto-ignition		Maximal temperature of the air recorded in the center of the test flask after auto-ignition (°C)		Atm pressure (kPa)	Relative humidity (%)
		Observed	Corrected	Y / N	Lag (s)	Observed	Corrected
1	70	98	98	N	/	/	/	98.2	34
2	70	149	149	N	/	/	/	98.2	32
3	70	199	199	N	/	/	/	98.2	30
4	70	246	246	Y	17	264	264	98.1	28
5	70	225	225	N	/	/	/	98.3	44
6	70	234	234	N	/	/	/	96.2	44
7	07	240	240	N	/	/	/	96.2	41
8	70	243	243	N	/	/	/	96.1	39
9	90	243	243	Y	16	263	263	96.1	38
10	110	243	243	Y	16	247	247	96.1	36
11	130	243	243	Y	13	261	261	96.1	37
12	150	243	243	Y	15	260	260	98.6	38
13	90	240	240	N	/	/	/	98.6	36
14	90	241	241	N	/	/	/	98.5	36
15	110	241	241	Y	16	259	259	98.5	35
16	110	239	239	Y	25	257	257	98.3	37
17	110	237	237	N	/	/	/	98.2	35
18	130	237	237	N	/	/	/	98.2	35
19	150	237	237	Y	34	253	253	98.2	36
20	150	235	235	N	/	/	/	98.1	36
21	170	235	235	Y	30	251	251	98.1	36
22	170	233	233	N	/	/	/	98.0	36
23	190	233	233	N	/	/	/	97.8	37
24	190	235	235	N	/	/	/	97.8	37

 

The lowest auto-ignition temperature was found to be around 235 °C (observed value) with a volume of 170 µL.

The main test was conducted using this volume. 

 

Main test

Volume of test item injected in the oven: 170 µL

Assay No. 1

Injection No.	Temperature (°C)		Auto-ignition	Lag (s)	Maximal temperature of the air recorded in the center of the test flask after auto-ignition (°C)		Atmospheric pressure (kPa)	Relative humidity (%)
	Observed	Corrected			Observed	Corrected
1	235	235	N	/	/	/	97.8	38
2	236	236	Y	34	250	250	97.7	35

 

Assay No. 2

Injection No.	Temperature (°C)		Auto-ignition	Lag (s)	Maximal temperature of the air recorded in the center of the test flask after auto-ignition (°C)		Atmospheric pressure (kPa)	Relative humidity (%)
	Observed	Corrected			Observed	Corrected
1	235	235	N	/	/	/	97.7	34
2	236	236	Y	23	252	252	97.7	34

 

Assay No. 3

Injection No.	Temperature (°C)		Auto-ignition	Lag (s)	Maximal temperature of the air recorded in the center of the test flask after auto-ignition (°C)		Atmospheric pressure (kPa)	Relative humidity (%)
	Observed	Corrected			Observed	Corrected
1	236	236	Y	31	252	252	98.4	31
2	235	235	N	/	/	/	98.4	31

Assay No. 4

 

Injection No.	Temperature (°C)		Auto-ignition	Lag (s)	Maximal temperature of the air recorded in the center of the test flask after auto-ignition (°C)		Atmospheric pressure (kPa)	Relative humidity (%)
	Observed	Corrected			Observed	Corrected
1	235	235	N	/	/	/	98.4	30
2	236	236	N	/	/	/	98.4	26
3	237	237	Y	25	254	254	98.4	27

 

Assay No. 5

Injection No.	Temperature (°C)		Auto-ignition	Lag (s)	Maximal temperature of the air recorded in the center of the test flask after auto-ignition (°C)		Atmospheric pressure (kPa)	Relative humidity (%)
	Observed	Corrected			Observed	Corrected
1	236	236	Y	26	253	253	98.4	26
2	235	235	N	/	/	/	98.4	25

 

Summary

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

	Auto-ignition temperature (°C)		Auto-ignition Lag (s)	Maximal temperature of the air recorded in the center of the test flask after ignition (°C)		Atmospheric pressure (kPa)	Relative humidity (%)
Assay No.	Observation	Corrected		Observed	Corrected
1	236	236	34	250	250	97.7	35
2	236	236	23	252	252	97.7	34
3	236	236	31	252	252	98.4	31
4	237	237	25	254	254	98.4	27
5	236	236	26	253	253	98.4	25

 

Conclusion

The auto-ignition temperature of the test item was 236 °C ± 3 °C (corrected temperature).

Conclusions:

An auto flammability value of 236 °C ± 3°C at 97.7 to 98.4 kPa was determined using a relevant test method and in compliance with GLP. The result is considered to be reliable.

Description of key information

Auto-ignition temperature: 236°C at 97.7 to 98.4 kPa (EU Method A.15)

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:

236 °C

Additional information

An auto-ignition temperature value of 236 ± 3°C at 97.7 to 98.4 kPa was determined using a relevant test method and in compliance with GLP.  The result is considered to be reliable and has been selected as the key study.

In a supporting study, an auto-ignition temperature value of 243°C at 961.4 to 969.5 hPa was determined using a relevant test method and in compliance with ISO 9001:2008.

In a secondary source to which reliability could not be assigned, an auto-ignition temperature value of 400°C was reported for the substance.