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EC number: 202-895-5
CAS number: 100-85-6
TGA EXPERIMENT (PRELIMINARY TEST)
Decrease of weight from 80°C upwards:
25% at 117°C and 70% at 130°C.
After the experiment, a grey residue
remained in the sample container. The change of the colour indicated
reaction and/or decomposition of the test item.
DSC EXPERIMENT 1
During cooling, no effects were observed
which could be ascribed to crystallization of the test item. During
heating, an endothermic peak was observed starting at 50°C. This effect
was most likely caused by evaporation of volatile components and
reaction and/or decomposition of the test item. After the experiment, a
grey residue remained in the sample container. The change of the colour
may be an indication for reaction and/or decomposition of the test item.
DSC EXPERIMENT 2
Endothermic effects were observed between
50°C and 150°C and between 200°C and 250°C. The first endothermic effect
was ascribed to evaporation of volatile components and reaction and/or
decomposition of the test item. The second endothermic effect was
ascribed to reaction and/or decomposition of the test item. After the
experiment, a grey deposit remained in the sample container.
on the observations made during the experiments, it cannot be concluded
with certainty when reaction and/or decomposition occurred, since
volatile components were evaporating as well.
STORAGE IN FREEZER TEST
After storage in a freezer (-19.0 ± 0.3°C)
for 19 hours, the test item was observed to be a viscous liquid.
After storage in freezer (-80.3 ± 1.0°C) for
19 hours, the test item was observed to be a very viscous liquid.
Differential Scanning Calorimetry (DSC) experiments were performed in a
GLP study according to EC A.1, OECD 102 and OPPTS 830.7200. A solution
of 56-57% Benzyltrimethylammonium hydroxide in methanol was tested. DSC
experiments showed no effect due to freezing of the liquid test material
between 25°C and -90°C. After storage in freezers, the test material was
visually observed to be a viscous liquid at ca. -19°C and a very viscous
liquid at ca. -80°C. Based on all results, it was concluded that the
BTMAOH 56-57% in METHANOL has no melting/freezing point at temperatures
down to -80°C.
Reaction and/or decomposition of Benzyltrimethylammonium hydroxide
(BTMAOH) was observed in the DSC experiments. Boiling of BTMAOH was not
observed below the temperature at which reaction and/or decomposition
started. According to the SCiFinder data base (25 oct 2018) the boiling
point of methanol is 64.7°C and the melting point of BTMAOH is 80°C.
view of the observed effects in DSC experiments in the temperature range
50°C and 250°C, i.e. solvent evaporation overlapping with
reaction/decomposition effects of the substance, it is deemed not
meaningful to perform a vapour pressure study with a solution of BTMAOH
in methanol. The results would mainly reflect the vapour pressure of the
solvent and/or decomposition products, and thus not provide reliable
information on the vapour pressure of BTMAOH.
attached document for more explanation.
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