Tungsten oxide

Appearance / physical state / colour

Link to relevant study record(s)

Reference

Reference 1

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 for cross-reference:

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

Reference 2

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 for cross-reference:

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

Reference 3

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 for cross-reference:

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

Reference 4

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 for cross-reference:

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 tungsten oxide is a solid which ranges from dark blue to black.