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Administrative data

Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
28 Nov 2018 - 19 Dec 2018
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2018
Report date:
2018

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Deviations:
not specified
GLP compliance:
yes
Type of method:
differential scanning calorimetry

Test material

Constituent 1
Chemical structure
Reference substance name:
Magnesium potassium fluoride silicate (Mg2.7K0.7Si4O10F2)
EC Number:
949-694-5
Molecular formula:
Mg2.7K0.7Si4O10F2
IUPAC Name:
Magnesium potassium fluoride silicate (Mg2.7K0.7Si4O10F2)
Test material form:
solid: particulate/powder
Details on test material:
Trade name: MICROMICA
Specific details on test material used for the study:
Chemical name: Magnesium potassium fluoride silicate (Mg2.7K0.7Si4O10F2)
Previously known as: magnesium potassium silicon fluoride hydroxide oxide, and referenced as CAS number 273730-58-8
Trade name: MICROMICA
Composition formula: K₀.₇Mg₂.₇Si₄O₁₀F₂
Molecular weight: 403.33 g/mol
Purity of test item: ≥95%
Impurity: <5% water
Lot number: 776A

Results and discussion

Melting / freezing point
Key result
Melting / freezing pt.:
> 400 °C
Atm. press.:
ca. 101 325 Pa
Decomposition:
no
Sublimation:
no

Applicant's summary and conclusion

Conclusions:
No peaks were observed in the DSC charts and the test item did not change in appearance after testing (white powder). As the measurement was performed up to 400 °C, it is therefore concluded the melting point of the test item is >400 °C.
Executive summary:

The melting point of the test item was measured in a GLP study performed using method OCED 102. No peaks were observed in the DSC charts and the test item did not change in appearance after testing (white powder). As the measurement was performed up to 400 °C, it is therefore concluded the melting point of the test item is >400 °C.

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