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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:
not reported
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
data from handbook or collection of data
Remarks:
Valid with restriction. Data from handbook or collection of data.
Principles of method if other than guideline:
no principles of method available; handbook data
GLP compliance:
not specified
Physical state at 20°C and 1013 hPa:
solid
Remarks:
brown monoclinic crystal
Form:
crystalline
Colour:
brown
Substance type:
inorganic
Conclusions:
Tungsten (IV) oxide is a solid inorganic substance which forms brown, monoclinic crystals.
Executive summary:

According the CRC Handbook for Chemistry and Physics Tungsten (IV) oxide is a solid inorganic substance which forms brown, monoclinic crystals.

Endpoint:
appearance / physical state / colour
Type of information:
other: safety data sheet
Adequacy of study:
supporting study
Study period:
2011
Reliability:
4 (not assignable)
Rationale for reliability incl. deficiencies:
secondary literature
Remarks:
Secondary literature. Safety data sheet.
Reason / purpose:
reference to same study
Principles of method if other than guideline:
information on methods not reported; safety data sheet
GLP compliance:
no
Physical state at 20°C and 1013 hPa:
solid
Form:
powder
Colour:
brown
Odour:
odourless
Substance type:
inorganic
Conclusions:
Tungsten dioxide is an odourless, brown powder.
Executive summary:

Tungsten dioxide is reproted to be an odourless, brown powder in the safety data sheet provided by H.C. Starck.

Description of key information

According the CRC Handbook for Chemistry and Physics (92nd edition) Tungsten (IV) oxide is a solid inorganic substance which forms brown, monoclinic crystals. The same information is reported in the safety data sheet.

Key value for chemical safety assessment

Physical state at 20°C and 1013 hPa:
solid

Additional information

Information on the appearance, physical state and colour of tungsten dioxide are available in the CRC Handbook for chemistry and physics and in the safety data sheet.