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Physical & Chemical properties

Melting point / freezing point

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Reference
Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
May-Sept 2012
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Study followed current OECD guideline, but GLP certification not noted.
Qualifier:
according to
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Deviations:
no
GLP compliance:
no
Type of method:
capillary method
Specific details on test material used for the study:
CYANOX® 1790 Antioxidant
IUPAC nomenclature - Tris(4-tert-butyl-3-hydroxy-2,6-dimethylbenzyl) isocyanurate
Synonym - [tris(4-t-butyl-3-hydroxy-2,6-dimethyl-benzyl)-s-triazine-2,4,6-(1H,3H,5H) trione]
Lot WP1031901
Appearance - White powder, odorless
CAS No. 40601-76-1
Molecular Formula - C42H57N3O6
Molecular Weight - 699.92 g/mole
Purity > 99%
Melting / freezing pt.:
157.9 °C
Atm. press.:
ca. 1 013 hPa
Decomposition:
no

 

Temperature (°C)

Specimen #

Stage A

Stage B

Stage C

Stage D

Stage E

1

150.1

151.2

154.2

156.7

157.9

2

150.1

151.6

154.3

156.5

157.9

Table 5.1. Temperatures noted on two specimens of the test substance in the Capillary Melting System

Conclusions:
The mean heating range is 150.1 to 157.9 °C. The melting point is the final observed temperature, 157.9°C.

Description of key information

Physical characterization of the test substance by Cytec Industries, Incorporated. Melting point according to OECD 102.

The mean heating range is 150.1 to 157.9 °C. The melting point is the final observed temperature, 157.9 °C.

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
157.9 °C

Additional information