Registration Dossier

Diss Factsheets

Administrative data

Endpoint:
flash point of flammable liquids
Data waiving:
study technically not feasible
Justification for data waiving:
the study does not need to be conducted because the flash point is only relevant to liquids and low melting point solids
Cross-referenceopen allclose all
Reason / purpose for cross-reference:
data waiving: supporting information
Reference
Endpoint:
appearance / physical state / colour
Type of information:
other: assessed based on test material information from another study report
Adequacy of study:
key study
Study period:
From February 15, 2002 to february 20, 2002
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Appearance based on observations from other testing endpoints conducted on this substance all at the same laboratory.
Reason / purpose for cross-reference:
reference to same study
Principles of method if other than guideline:
Appearance assessment based on the observations made during testing for other endpoints.
GLP compliance:
yes
Specific details on test material used for the study:
Purity: 98.2%
White, coarse grained substance
Physical state at 20°C and 1013 hPa:
solid
Substance type:
organic

White coarse grained substance.

Conclusions:
The purified form of the test substance appears as white coarse grained solid.
Executive summary:

The physical state and appearance of the test substance, C12 -14 TMAC, were visually observed during testing of other endpoint testing. The purified form of the test substance appears as white coarse grained solid (Schneider, 2002).

Reason / purpose for cross-reference:
data waiving: supporting information
Reference
Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
From February 15, 2002 to february 20, 2002
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Deviations:
no
Qualifier:
according to guideline
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Type of method:
differential scanning calorimetry
Remarks:
glass crucible (closed and open)
Specific details on test material used for the study:
Purity: 98.2%
White, coarse grained substance
Key result
Decomposition:
yes
Decomp. temp.:
ca. 188 °C
Remarks on result:
other: no melting or boiling point

Observations:

In the temperature range between approximately 55°C to 70°C, a partial change in the optical properties of the test substance was seen. From this temperature up to approx. 188°C, no melting was observed. Beginning at this temperature, the sample became soft and partially liquid. At the top margin of the sample, the test substance turned brown. These effects intensified until 230°C when a volume contraction of the sample was observed. Starting at this temperature, evolving of gas bubbles occured. Finally, at 235°C, the sample was divided in two fractions, one liquid and one solid. After cooling down the sample to room temperature, the melted phase remained liquid.

(No transitional period).

Conclusions:
Under the study conditions, the test substance had no melting or boiling point. It started to decompose at a mean-onset temperature of 189°C.
Executive summary:

A study was conducted to determine the melting point / freezing point of the test substance, C12-14 TMAC, according to OECD Guideline 102 and EU Method A.1. Two independent tests: 1. Visual observation and 2. DSC - glass crucible (closed and open) were conducted. In the temperature range from approximately 55°C to 70°C, a partial change in the optical properties of the test substance was seen. From this temperature up to approximately 188°C, no melting was observed. Beginning at this temperature, the sample became soft and partially liquid. At the top margin of the sample, the test substance became brown. These effects intensified until 230°C when a volume contraction of the sample was observed. Starting at this temperature, evolving of gas bubbles occured. Finally, at 235°C, the sample was divided in two fractions, one liquid and one solid. After cooling down the sample to room temperature, the melted phase remained liquid. Under the study conditions, the test substance had no melting or boiling point. It started to decompose at a mean-onset temperature of 189°C (Schneider, 2002).

Data source

Materials and methods

Results and discussion

Applicant's summary and conclusion