trace element arsenic(3+) 3 74.91995 74.922 CHEBI:35828 arsenic(3+) ion As(3+) [As+3] LULLIKNODDLMDQ-UHFFFAOYSA-N As gmelin:40114 chebi_ontology arsenic(III) cation InChI=1S/As/q+3 arsenic(3+) arsenic(III) cation arsenic(3+) arsenic(3+) ion