Benzyltrimethylammonium hydroxide

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:

from 13 April 2018 to 09 May 2018

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Justification for type of information:

The substance can be produced through different process routes, yielding solutions in water or organic solvent (e.g. methanol or ethylene glycol).
It was initially unclear how to register the substance (mono-constituent or multi-constituent substance) and which manufactured substance to test to fulfil the REACH data requirements. After consultation with the ECHA helpdesk, the test program was started with the manufactured substance of the Lead registrant (solvent: methanol) in which the highest amount of solvent could be removed without causing degradation of the substance. This resulted in the selection of a solution of 56-57% BTMAOH in methanol as test substance.
During the course of the test program, and in order to aid meaningful risk assessment, after consultation with ECHA and upon ECHA's recommendation, it was considered to be more appropriate to test the water-based manufactured substance. As a consequence, some testing was performed with a BTMAOH solution in methanol, and some testing was performed with a BTMAOH solution in water.

The current entry reflects a test performed with a methanol-based test solution.

Qualifier:

according to guideline

Guideline:

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

Version / remarks:

2016

Deviations:

no

Qualifier:

according to guideline

Guideline:

DIN 51794 (Testing of mineral oil hydrocarbons - Determination of ignition temperature)

Version / remarks:

2003

Deviations:

no

GLP compliance:

yes

Key result

Auto-ignition temperature:

320 °C

Atm. press.:

>= 1 013 - <= 1 014 hPa

Table: Results of the auto-ignition temperature measurements

Test	Volume [μL]	Auto-ignition temperature [°C]	Ignition delay [s]	Colour of the flame	Minimum auto-ignition temperature [°C]
1	45	346	3	orange/blue	323
	50	323	4	orange/blue
	70	326	4	orange/blue
2	40	356	2	orange	333
	60	333	3	orange/blue
	80	334	4	orange
3	35	366	3	orange/blue	330
	55	330	3	orange/blue
	90	346	3	orange/blue

Conclusions:

The auto-ignition temperature of BTMAOH 56-57% in METHANOL was determined to be 320°C (at 1013-1014 hPa).

Executive summary:

The auto-ignition temperature was determined in a GLP study according to EC A.15 and DIN 51794. A solution of 56 -57% Benzyltrimethylammonium hydroxide in methanol was tested. The auto-ignition temperature of BTMAOH 56-57% in METHANOL was determined to be 320°C (at 1013-1014 hPa).

Description of key information

For the registered substance BTMAOH, having a melting point of 80°C, it is not needed (and technically not feasible) to determine the relative self-ignition temperature.

Additional information

Using a commercially available auto-ignition temperature apparatus, the auto-ignition temperature of BTMAOH 56-57% in METHANOL was determined to be 320°C (at 1013-1014 hPa).