anion substitutions in 150 mm sodium salts indicated that anions of relatively large hydrated size ( f- , acetate , formate , gluconate , tartrate , so2-4 , diatrizoate , io-3 , bro-3 , h2po-4 , hco-3 , borate , co2-3 ) do induce apnea , whereas small anions ( no-3 , clo-3 , scn- , i- , br- ) similar to cl- in size do not .
C0016327
f
C0003075
anions