Octyl methacrylate

Auto flammability

Link to relevant study record(s)

Reference

Endpoint:

auto-flammability

Type of information:

read-across based on grouping of substances (category approach)

Adequacy of study:

weight of evidence

Reliability:

1 (reliable without restriction)

Justification for type of information:

Read across from 2-Ethylhexyl methacrylate category member donor substance.
REPORTING FORMAT FOR THE CATEGORY APPROACH
see attached category document
PM_Lower Alkyl (C1-C8) Methacrylates
This is a category (C1-C8 lower Alkyl Methacrylates) with clear trends in the physicochemical properties of its members, related to molecular weight, molecular size and hydrophilicity.

Qualifier:

according to guideline

Guideline:

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

GLP compliance:

yes (incl. QA statement)

Auto-ignition temperature:

250 °C

Atm. press.:

>= 1 010 - <= 1 013 hPa

Preliminary test: The lowest self-ignition temperature was determined to be 258 ^oC.

Main test: The following table shows the results of the three principal tests. Temperatures, where self-ignition (+) was detected and where not (-). The amount of test item tested at each measurement is indicated as numbers of drops.

1. Principal test			1. Principal test (continued)			2. Principal test
Barometric pressure at 1013.3 hPa			Barometric pressure at 1012.3 hPa			Barometric pressure at 1010.8 hPa
T/^oC	drops	+/-	T/^oC	drops	+/-	T/^oC	drops	+/-
258	5	+	248	3	-	253	5	+
253	5	-	248	4	-	248	8	-
253	10	-	248	5	-	248	9	-
253	2	-	248	6	-	248	10	-
253	3	-	248	8	-	248	4	-
253	8	+	248	9	-	248	3	-
248	8	-				248	7	-
248	7	-				248	2	-
248	9	-				248	1	-
248	10	-				248	5	-
248	2	-				248	6	-
248	1	-				248	8	-

3. Principal test
Barometric pressure at 1011.0  hPa
T/^oC	drops	+/-
253	8	+
248	8	-
248	9	-
248	7	-
248	10	-
248	6	-
248	5	-
248	7	-
248	1	-
248	2	-
248	3	-
248	4	-
248	8	-

The self-ignition temperature of the test item is 250 ^oC.

Conclusions:

In a valid guideline study the self-ignition temperature of the test item is 250 °C.

Executive summary:

In a valid guideline study the self-ignition temperature of the test item is 250 °C.

Description of key information

Read across to the structural analogue 2 -Ethylhexyl methacrylate category member of the lower alkyl methacrylate category (C1 -C8):

The auto flammability temperature of 2-ethylhexyl methacrylate is reported to be 250°C.

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:

250 °C