Azomethine-H hydrate, reagent for boron determinationReag. Ph. Eur.M.= 423,40 CAS:32266-60-7SYNONYMS: 4-Hydroxy-5-(2-Hydroxybenzylidenamine)-Naphtalene-2,7-Disulphonic AcidIdentity IR passes testA 1% , 1 cm, λ236 nm at pH 5.1 >1200Sensitivity to B Passes test