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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:
FROM 18-FEB-2010 to 13-APR-2010
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: see 'Remark'
Remarks:
The description of the substance comes from an experimental study report on flammability, conducting in accordance with Good Laboratory Practices. The substance is adequately defined (with certificate of analysis). No specific test guideline is required.
Reason / purpose for cross-reference:
reference to same study
Qualifier:
no guideline required
Principles of method if other than guideline:
Visual inspection
GLP compliance:
yes (incl. QA statement)
Physical state at 20°C and 1013 hPa:
solid
Form:
flakes
Colour:
Brown shavings
Substance type:
organic
Conclusions:
Catechol is an organic solid substance, appearing under the form of brown flakes at ambient temperature and pressure.
Executive summary:

The substance, catechol, was tested for flammability under GLP. In this context, the appearance of the sample was described, indicating that catechol is a solid substance appearing under the form of brown flakes.

Endpoint:
appearance / physical state / colour
Type of information:
not specified
Adequacy of study:
supporting study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
data from handbook or collection of data
Remarks:
Data comes from peer-reviewed handbooks cited among "reference books containing peer-reviewed physico-chemical data" in the ECHA guidance document on information requirements and chemical safety assessment (R.7a).
Reason / purpose for cross-reference:
reference to same study
Qualifier:
no guideline required
Principles of method if other than guideline:
Visual inspection
GLP compliance:
no
Physical state at 20°C and 1013 hPa:
solid
Remarks:
molten at > 105°C
Form:
flakes
Colour:
beige-brown
Odour:
other: weak, of phenol
Substance type:
organic
Conclusions:
At ambient temperature and pressure, catechol is an organic solid substance, appearing under the form of beige-brown flakes with a weak odour of phenol.

Description of key information

At ambient temperature and pressure, catechol is an organic solid substance, appearing under the form of beige-brown flakes with a weak odour of phenol.

Key value for chemical safety assessment

Physical state at 20°C and 1013 hPa:
solid

Additional information

An experimental study of reliability 1 according to Klimisch, dealing with another endpoint but reporting description of the substance, was selected as a key study. Supporting data coming from peer-reviewed handbooks were consistent with the above study, with further information on the colour and the odour.