Each dose (0.5 mL) of Cecolin 9 contains aluminum hydroxide adjuvant-adsorbed recombinant L1 virus-like particle antigens:

The HPV L1 antigens are expressed in Escherichia coli by recombinant DNA technology and self-assemble into virus-like particles.
Cecolin 9 contains aluminum hydroxide adjuvant, sodium chloride, sodium dihydrogen phosphate dihydrate, disodium hydrogen phosphate dihydrate, polysorbate 80 (II), and water for injection.
Cecolin 9 contains no preservatives or antibiotics.
Cecolin 9 is presented as 0.5 mL suspension for injection in a vial or PFS.
Upon storage, a fine white deposit with a clear colorless supernatant can be observed. Cecolin 9 would be a suspension after thorough agitation.