Assertion: alkaloid | /r/HasProperty | colourless
Facets:
value: at ambient conditions
type: TEMPORAL
value: usually
type: DEGREE
value: in their pure form
type: OTHER
Source sentences:
text: In their pure form most alkaloids are colourless, nonvolatile, crystalline solids.
text: Most alkaloids contain oxygen in their molecular structure; those compounds are usually colorless crystals at ambient conditions.