Butyl 4-hydroxybenzoate is an organic compound, has proven to be a highly successful antimicrobial preservative in cosmetics, also used in medication suspensions, and as a flavoring additive in food.

Ethylparaben, a natural product isolated and purified from the male melon fly Dacus cucurbitae, is the ethyl ester of p-hydroxybenzoic acid, used as an antifungal preservative.

Isobutyl paraben is an anti-microbial agent and anti-fungal agent.

Propylparaben, the n-propyl ester of p-hydroxybenzoic acid, occurs as a natural substance found in many plants and some insects

Sorbic Acid inhibits growth of fungi, yeast, mold and some bacteria and is nearly nontoxic to humans. It's a natural preservative that comes from the rowan berries, Sorbus aucuparia (family Rosaceae) and widely used in foods, drugs, and cosmetic products as preservatives.

Salicylic acid, a natural product extract from Willow bark, well known as an antiinflammatory inhibitor of cyclooxygenase activity.

Phenoxyethanol has a broad spectrum of antimicrobial activity against various gram-negative and gram-positive bacteria. Phenoxyethanol is an uncouple agent in oxidative phosphorylation from respiration and competitively inhibits malate dehydrogenase. Phenoxyethanol is used as a preservative in cosmetic, vaccine, and textile, et al.

Amprolium HCl is a coccidiostat used in poultry, is a thiamine analogue and blocks the thiamine transporter of Eimeria species by blocking thiamine uptake.

Dimetridazole is a nitroimidazole class drug that combats protozoan infections.

Sodium benzoate is a preservative and uesd as a food additive which is bacteriostatic and fungistatic under acidic conditions

Methylparaben, a natural product isolated and purified from the barks of Tsuga dumosa, is used as a preservative.