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Physical & Chemical properties

Appearance / physical state / colour

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Endpoint:
appearance / physical state / colour
Type of information:
experimental study
Adequacy of study:
key study
Study period:
NA to: 2009-08-25
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study with acceptable restrictions
Remarks:
v
Reason / purpose:
reference to same study
Principles of method if other than guideline:
Samples used for test were submitted in their unaltered form and appearance was reported
GLP compliance:
not specified
Physical state at 20°C and 1013 hPa:
solid
Form:
powder
Colour:
black
Substance type:
inorganic
Endpoint:
appearance / physical state / colour
Type of information:
experimental study
Adequacy of study:
supporting study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
guideline study with acceptable restrictions
Remarks:
Well documented study conducted with sound scientific methodology. However, purpose of study went beyond examination of physical characteristics and few details were provided regarding these determinations.
Reason / purpose:
reference to same study
Principles of method if other than guideline:
substances were examined via scanning electron microscope (SEM)
GLP compliance:
not specified
Physical state at 20°C and 1013 hPa:
solid
Form:
other: WO3.0 and WO2.9 = isometric particles; WO2.81, WO2.66, and WO2.51 = contained isometric and fiber-shaped particles
Substance type:
inorganic
Endpoint:
appearance / physical state / colour
Type of information:
experimental study
Adequacy of study:
supporting study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
data from handbook or collection of data
Remarks:
Data from peer-reviewed handbook or collection of data
Reason / purpose:
reference to same study
Principles of method if other than guideline:
Data in this peer-reviewed publication were taken from many sources, including both compilations and primary literature. Where conflicts were found, the value deemed most reliable was chosen for inclusion in the handbook. Reference sources were not provided for this parameter, nor was the experimental method.
GLP compliance:
not specified
Physical state at 20°C and 1013 hPa:
solid
Form:
crystalline
Colour:
reddish-violet
Substance type:
inorganic
Endpoint:
appearance / physical state / colour
Type of information:
experimental study
Adequacy of study:
supporting study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
data from handbook or collection of data
Remarks:
Data from peer-reviewed handbook or collection of data
Reason / purpose:
reference to same study
Principles of method if other than guideline:
Data in this peer-reviewed publication were taken from many sources, including both compilations and primary literature. Where conflicts were found, the value deemed most reliable was chosen for inclusion in the handbook. Reference sources were not provided for this parameter, nor was the experimental method.
GLP compliance:
not specified
Physical state at 20°C and 1013 hPa:
solid
Form:
crystalline
Colour:
blue to deep blue
Substance type:
inorganic

Description of key information

Inspection of different samples revealed that TBO is a solid which ranges from dark blue to black.

Key value for chemical safety assessment

Additional information