(3-Hydroxyphenyl)phosphonic acid (m-Hydroxyphenyl)phosphonic acid 3-Hydroxybenzenephosphonic acid 33733-31-2 4-16-00-01110 (Beilstein Handbook Reference) BRN 2718248 Phosphonic acid, (3-hydroxyphenyl)- (9CI) Phosphonic acid, (m-hydroxyphenyl)-