dentogelPharmacological action. Dentogel is an antiseptic. This medication is a quaternary ammonium compound, belongs to the cationic surfactant. Dentogel (Benzalkonium Chloride)Pharmacological action. Dentogel is an antiseptic. This medication is a quaternary ammonium compound, belongs to the cationic surfactant. Dentogel (Benzalkonium Chloride)