Ortho Phthalaldehyde 0.55 Percent W/W,5 Ltr.Jar. Specification 1.Active Ingrents: Ortho Phthalaldehyde (Opa) 0.55 Percent . I Inert Ingredients Aqueous Base Containing Buffering Agents, Chelating Agents And A Corrosion Inhibitor 99.45 Percent 2. Us Fda Approved Or Likewise. 3. Must Submit Microbiological Data Like Bactericidal, Fungicidal, Tuberculocidal, Virucidal , Sporicidal Data. 4. Ph 7.5, 5. Should Be Stable At 15 30 Degree Centigrade For 2 Years Unopened. After Opening Solution