Diphtheria toxoid is formaldehyde inactivated form of diphtheria toxin (Item No. 19657) that is non-specifically cross linked and subject to rEArrangement.1 Formulations containing diphtheria toxoid have been used as adjuvents in vaccines to produce immunity to diphtheria, the disEAse caused by C. diphtheriae infection.2Technical InformationFormulationEAch vial, when reconstituted to 0.1 ml with water, contains 500 ug of diphtheria toxoid in 0.01 M sodium phosphate, pH 7.5, containing 0.1 mg/ml sorbitol