Assertion: pyridine's use | /r/HasProperty | brf
Facets:
Source sentences:
text: Typical halogens to be used in the present invention include chlorine (Cl 2 ), bromine (Br 2 ), iodine (I 2 ), and interhalogen compounds such as ClF, BrF, ClBr, ClI, Cl 3 I, BrI. Chlorine (Cl 2 ) is preferable from the cost perspective.