"nitrogen dioxide"@en-us . . "110587373"@en-us . . . . . . "113924661"@en-us . . "0.5"^^ . . . . . "14767087-n"^^ . . . . "nitrogen dioxide"^^ . . "114767087"^^ . "0"^^ . "a highly poisonous brown gas (NO2)"@en-us .