Registration Dossier
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EC number: 945-327-8 | CAS number: -
Melting point / freezing point
Administrative data
Link to relevant study record(s)
- Endpoint:
- melting point/freezing point
- Type of information:
- other: Quartzene CMS - SDS
- Adequacy of study:
- key study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- study well documented, meets generally accepted scientific principles, acceptable for assessment
- Principles of method if other than guideline:
- Nor specified.
- Type of method:
- other: See "Remarks"
- Remarks:
- Not specified.
- Key result
- Melting / freezing pt.:
- > 1 000 °C
- Conclusions:
- Melting point for Quartzene CMS is > 1000 degree Celcius.
- Endpoint:
- melting point/freezing point
- Type of information:
- read-across from supporting substance (structural analogue or surrogate)
- Adequacy of study:
- weight of evidence
- Justification for type of information:
- 1. HYPOTHESIS FOR THE ANALOGUE APPROACH
Due to sharing similar structural, physical and chemical properties to CMS, synthetic amorphous silica is considered appropriate for read-across purposes.
- Reason / purpose for cross-reference:
- read-across source
- Reason / purpose for cross-reference:
- read-across source
- Reason / purpose for cross-reference:
- read-across source
- Reason / purpose for cross-reference:
- read-across source
- Key result
- Melting / freezing pt.:
- >= 1 600 - <= 1 725 °C
- Conclusions:
- Similar to synthetic amorphous silicon dioxide, melting point for CMS is estimated to be >1000 °C.
- Executive summary:
Melting point for synthetic amorphous silicon dioxide has been reported to be approximately 1700 °C (1600 -1725 °C
) (OECD SIDS, 2004 and Fruijtier-Pölloth, 2012). Due to sharing similar structural, physical and chemical properties to CMS, synthetic amorphous silica is considered appropriate for read-across purposes. Taken together, similar to synthetic amorphous silicon dioxide, melting point for CMS is assumed to be above 1000 °C.
- Endpoint:
- melting point/freezing point
- Type of information:
- not specified
- Adequacy of study:
- weight of evidence
- Reliability:
- 4 (not assignable)
- Rationale for reliability incl. deficiencies:
- data from handbook or collection of data
- Remarks:
- According to OECD SIDS (2004) data is from handbook or colelction of data.
- Principles of method if other than guideline:
- Method not specified in OECD SIDS (2004).
- GLP compliance:
- no
- Type of method:
- other: See "Remarks"
- Remarks:
- Not specified
- Specific details on test material used for the study:
- Synthetic amorphous silicone dioxide (CAS 7631-86-9). Inorganic.
Purity: ca. 98.5 % w/w. - Key result
- Melting / freezing pt.:
- ca. 1 700 °C
- Conclusions:
- The melting point for synthetic amorphous silicon dioxide (CAS 7631-86-9) was measured to approximately 1700 °C.
- Executive summary:
Data on melting points for synthetic amorphous silicas have been summarized in OECD SIDS (2004). The melting point for synthetic amorphous silicon dioxide (CAS 7631-86-9) was measured to approximately 1700 °C.
- Endpoint:
- melting point/freezing point
- Type of information:
- other: Compiled data on melting points for synthetic amorphous silicas including precipitated silica (CAS 112926-00-8).
- Adequacy of study:
- weight of evidence
- Reliability:
- 4 (not assignable)
- Rationale for reliability incl. deficiencies:
- secondary literature
- Remarks:
- Published peer-reviewed review.
- Principles of method if other than guideline:
- Method not specified in published review paper (Fruijtier-Pölloth, 2012).
- Type of method:
- other: See "Remarks"
- Remarks:
- Not specified
- Specific details on test material used for the study:
- Synthethic amorphous silicone dioxide, precipitated (CAS 112926-00-8).
- Key result
- Melting / freezing pt.:
- >= 1 600 - <= 1 725 °C
- Conclusions:
- Melting point for precipitated synthetic amorphous silica (CAS 112926-00-8) was reported to be between 1600-1725 Celcius (Fruijtier-Pölloth, 2012).
- Endpoint:
- melting point/freezing point
- Data waiving:
- study scientifically not necessary / other information available
- Justification for data waiving:
- other:
Referenceopen allclose all
Description of key information
Melting point for synthetic amorphous silicon dioxide has been reported to be approximately 1700 °C (1600 -1725 °C
) (OECD SIDS, 2004 and Fruijtier-Pölloth, 2012). Due to sharing similar structural, physical and chemical properties to Quartzene CMS, synthetic amorphous silica is considered appropriate for read-across purposes. Taken together, melting point for Quartzene CMS is estimated to be > 1000 °C. Melting point for the paste form of Quartzene CMS is considered not applicable.
Key value for chemical safety assessment
- Melting / freezing point at 101 325 Pa:
- 1 700 °C
Additional information
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