| − | '''Citrate''', or more formally 2-hydroxy-1,2,3-propanetricarboxylic acid, is a cojugate base, usually sold as a salt called sodium citrate<ref>[http://www.jtbaker.com/msds/englishhtml/s3386.htm Material safety data sheet]</ref>. | + | '''Citrate''', or more formally 2-hydroxy-1,2,3-propanetricarboxylic acid, is a [[conjugate base]], usually sold as a [[salt]] called sodium citrate<ref>[http://www.jtbaker.com/msds/englishhtml/s3386.htm Material safety data sheet]</ref>. |