6,6'-di-tert-butyl-2,2'-methylenedi-p-cresol

Melting point / freezing point

Link to relevant study record(s)

Reference

Reference 1

Endpoint:

melting point/freezing point

Type of information:

experimental study

Adequacy of study:

weight of evidence

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

other: The melting point of DBMC is cited in the ChemIDplus database which is a valid data source. As no details on materials and methods used are available, the value is reliable with restrictions.

Reason / purpose for cross-reference:

reference to same study

Reason / purpose for cross-reference:

reference to other study

Principles of method if other than guideline:

Value cited in the database only. No details on materials and methods available.

GLP compliance:

not specified

Type of method:

other: not available

Melting / freezing pt.:

123 °C

No remarks

Conclusions:

The melting point of DBMC is 123 °C.

Executive summary:

The melting point of DBMC is experimentally determined to be 123 °C as cited in the ChemIDplus Lite database.

Reference 2

Endpoint:

melting point/freezing point

Type of information:

not specified

Adequacy of study:

weight of evidence

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

other: The value for the melting point of DBMC is cited in the peer-reviewed CRC Handbook of Chemistry and Physics which is a reliable data source.

Reason / purpose for cross-reference:

reference to same study

Reason / purpose for cross-reference:

reference to other study

Principles of method if other than guideline:

Handbook data only. No details on materials and methods available.

GLP compliance:

not specified

Type of method:

other: not reported

Melting / freezing pt.:

131 °C

No remarks

Conclusions:

The melting point of DBMC is cited to be 131 °C.

Executive summary:

The melting point of DBMC is 131 °C as cited in the CRC Handbook of Chemistry and Physics.

Reference 3

Endpoint:

melting point/freezing point

Type of information:

not specified

Adequacy of study:

weight of evidence

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

other: see 'Remark'

Remarks:

The melting range of DBMC is cited in the MITI report with reference to various data sources such as The Merck Index, Lange's Handbook of Chemistry, Encyclopaedia Chimica etc., thus no detailed information on the determination of the melting range is available.

Reason / purpose for cross-reference:

reference to same study

Reason / purpose for cross-reference:

reference to other study

Principles of method if other than guideline:

The melting range is a compilation of the values derived from different data sources, thus no details on materials and methods used are available.

GLP compliance:

no

Type of method:

other: not reported

Melting / freezing pt.:

126.5 - 130 °C

No remarks

Conclusions:

The melting point of DBMC lies in the range of 126.5 - 130 °C.

Executive summary:

The melting point of DBMC lies in the range of 126.5 - 130 °C as compiled from different data sources - such as The Merck Index - in the MITI report.

Reference 4

Endpoint:

melting point/freezing point

Type of information:

not specified

Adequacy of study:

weight of evidence

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

other: The temperature range for the melting point of DBMC was cited in the OECD SIDS report from the Beilstein database. As no further details on the determination of this melting range is available, the information is reliable with restrictions.

Reason / purpose for cross-reference:

reference to same study

Reason / purpose for cross-reference:

reference to other study

Principles of method if other than guideline:

The melting range for DBMC was cited from the Beilstein Data compiling different data sources. No details available.

GLP compliance:

no

Type of method:

other: not available

Melting / freezing pt.:

130 - 131 °C

This temperature range was selected from seven available data sources/scientific documents indicating values of 129 - 131.21 °C. Two values were neglected because the data sources were patents.

Conclusions:

The melting point of DBMC lies in the range of 130 - 131 °C.

Executive summary:

The melting point of DBMC lies in the range of 130 - 131 °C as cited in the OECD SIDS report. This range is determined by selection of various studies/scientific documents cited in the Beilstein database.

Reference 5

Endpoint:

melting point/freezing point

Type of information:

not specified

Adequacy of study:

weight of evidence

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

other: The melting point of DBMC is cited in the ECB - summary fact sheet which is a reliable data source. As no details on materials and methods used is available, the value is reliable with restrictions.

Reason / purpose for cross-reference:

reference to same study

Reason / purpose for cross-reference:

reference to other study

Principles of method if other than guideline:

Handbook data only. No details on materials and methods available.

GLP compliance:

not specified

Type of method:

other: not reported

Melting / freezing pt.:

130 °C

No remarks

Conclusions:

The melting point of DBMC is cited to be 130 °C.

Executive summary:

The melting point of DBMC is 130 °C as cited in the PBT report.

Reference 6

Endpoint:

melting point/freezing point

Type of information:

not specified

Adequacy of study:

weight of evidence

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

other: see 'Remark'

Remarks:

The melting range and melting point for Antioxidant MBP5 (chemically equivalent to Vulkanox) was listed in the report on ANTIOXIDANT MBP 5 from the Société Française D'Organo-Synthèse without indication of the method used. Hence these values are reliable with restrictions.

Reason / purpose for cross-reference:

reference to same study

Reason / purpose for cross-reference:

reference to other study

Principles of method if other than guideline:

The method used for the determination of the melting range is not reported.

GLP compliance:

no

Type of method:

other: no data

Melting / freezing pt.:

129 - 132 °C

Remarks on result:

other: Melting range for Antioxidant MBP 5 P, polymer grade, corresponding to 264 - 270 °F.

Melting / freezing pt.:

124 °C

Remarks on result:

other: Melting point for Antioxidant MBP5 T, rubber grade, corresponding to 255 °F.

No remarks

Conclusions:

The melting point of Antioxidant MBP 5 (i. e. DBMC) lies between 124 - 132 °C depending on the purity grade.

Executive summary:

The melting point of Antioxidant MBP 5, which is chemically equivalent to DBMC, lies between 124 - 132 °C (255 - 270 °F) depending on the purity grade of the test material.

Description of key information

Weight-of-evidence:
Six reliable literature sources delivered values for the melting point of DBMC in the range of 123 - 132 °C (OECD SIDS, 2000; MITI, 1992; Lide, 2009; PBT Working Group, 2009; ChemIDPlus, 2009, JE/NC, 1982).

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:

123 °C