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Physical & Chemical properties

Appearance / physical state / colour

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Reference
Endpoint:
appearance / physical state / colour
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2010
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
study well documented, meets generally accepted scientific principles, acceptable for assessment
Principles of method if other than guideline:
visual inspection
GLP compliance:
no
Physical state at 20°C and 1013 hPa:
solid
Form:
solid: crystalline
Substance type:
organic
Conclusions:
The substance is a hygroscopic, crystalline solid.
Executive summary:

The appearance is stated in CRC Handbook of Chemistry and Physics from 2010 (90 e.d.) as a hygroscopic, crystalline solid.

Description of key information

The appearance is stated in CRC Handbook of Chemistry and Physics from 2010 (90 e.d.) as a hygroscopic, crystalline solid.

Key value for chemical safety assessment

Physical state at 20°C and 1013 hPa:
solid
Form:
solid: crystalline

Additional information

Even though the substance itself is a crystalline solid, it has to be taken into account , that the substance is normally distributed as an aqueous solution and hence it is characterized as such. Choline chloride as an aqueous solution is a colourless and nearly odourless liquid (Taminco, 2013).


As this is the available form in which it is distributed, the risk assessment should be performed with the substance in this form. This will have i.a. impact on the risk arising from inhalation, since no inhalable dust is formed, or on the necessity to perform the testing for viscosity instead of particle size distribution (see related IUCLID chapters).

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