Registration Dossier

Data platform availability banner - registered substances factsheets

Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Physical & Chemical properties

Melting point / freezing point

Currently viewing:

Administrative data

Link to relevant study record(s)

Referenceopen allclose all

Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
supporting study
Study period:
2016.6.27
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
guideline study with acceptable restrictions
Qualifier:
according to guideline
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
GLP compliance:
no
Other quality assurance:
other: ISO9001
Type of method:
differential scanning calorimetry
Specific details on test material used for the study:
SOURCE OF TEST MATERIAL
- Source and lot/batch No.of test material:D2D0609
STABILITY AND STORAGE CONDITIONS OF TEST MATERIAL
- Storage condition of test material:Closed bottle under inert atomosphere
- Stability under test conditions: Stable under inert atomosphere
- Solubility and stability of the test substance in the solvent/vehicle:Soluble in water, but gradually decompose
- Reactivity of the test substance with the solvent/vehicle of the cell culture medium:Gradually decompose in contact with air.

TREATMENT OF TEST MATERIAL PRIOR TO TESTING
- Treatment of test material prior to testing: Prepare 1wt% aqueous solution.
- Preliminary purification step (if any):None
- Final dilution of a dissolved solid, stock liquid or gel:Nonne

FORM AS APPLIED IN THE TEST (if different from that of starting material)

OTHER SPECIFICS:
Key result
Remarks on result:
not determinable because of methodological limitations

Exothermic peaks were observed as follows;

run 1 229.83 C

run 2 227.79 C

Average 228.81 C

This peak is due to the crystal transform from delta-form to other crystal form such as alpha, beta or gamma form)

Conclusions:
The melting point of aluminium trititanium dodecachloride was tried to measure by DSC. No endothermal peak which might show melting point was not observed. Only exothermic peak was observed at around 229 C.
The titianium trichoride is known to have crystalline polymorphs, alpha, beta, gamma and delta form.
This substance has the least stable delta crystalline form to increase polymerisation activity. Thus the peak observed for DSC analysis is attributed to the exothermic peak to change its more stable crystalline form.
Executive summary:

The melting point of aluminium trititanium dodecachloride was not observed by DSC. Only exothermic peak was observed at around 229 C, which may be attributed to crystalline transform of titianium trichloride.

Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
weight of evidence
Study period:
from 2016-10-06 to 2016-1021
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
study well documented, meets generally accepted scientific principles, acceptable for assessment
Qualifier:
equivalent or similar to guideline
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Principles of method if other than guideline:
The TG/DTA (Thermal gravity/ Differential thermal analysis) was conducted on the test sample.
GLP compliance:
no
Other quality assurance:
other: ISO9001
Type of method:
thermal analysis
Specific details on test material used for the study:
Lot No. D2D0914
Key result
Decomposition:
yes
Decomp. temp.:
>= 307.4 - <= 318.9 °C

Small weight loss (1.98%) was observed at 128.2 °C and about 22 wt% weight loss was observed at from 307.4 to 318.9 °C. The latter weight loss might correspond to removal of aluminum chloride of which theoretical content in this substance is 22.4 wt%.

Conclusions:
Thermal analysis on aluminum trititanium dodecachloride was carried out with TG/DTA (Thermal gravity/Differential Thermal Analysis). Weight loss was observed at around 310 °C with gradual endothermal peak. Judging from this measurement, the decomposition temperature of aluminum trititanium dodeca chloride was determined to be around 310 °C.
Executive summary:

The decomposition temperature of aluminium trititainium dodecachloride was around 310 °C, which was determined by thermal analysis, TG/DTA.

Description of key information

DSC study using aluminum trititanium dodecachloride showed exothermic peak at around 230 °C. TG/DTA study showed obvious weight loss at around 310 °C. It is known for titanium trichloride to have crystalline polymorphs. This product is manufatured for polymerisation initiator and has least stable gamma crystalline form. The peak observed in DSC analysis seemed to be crystalline transformation temperature. In TG/DTA analysis, from 307 to 319 °C some amount weight loss of sample was observed. Thus decomposition temperature of aluminum trititanium dodecachloride was determined to be about 310 °C.

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
310 °C

Additional information

Aluminim trititanium dodecachloride decomposes at 307 - 320 °C. This material also transforms its crystalline form at around 230 °C.