Preservative used in Emulsion

Preservative used in Emulsion

Type

Example

Characteristic

Acid and acid derivatives

Benzoic acid 

Sorbic acid 

Propionic acid 

Dehydroacetic acid 

Antifungal

Alcohols

Chlorobutanol 

Phenoxy- 2-ethanol 

Eye prep. Synergism 

Aldehydes

Formaldehyde,  

Glutaraldehyde 

Broad spectrum 

Formaldehyde 

Derivatives 

Hexamethylene tetramine  Mono and de- methyl ol  dimethyl hydantoin 

Broad spectrum 

Phenolic

Phenol, Cresol, chlorophyll 

p-phenyl phenol 

p-chlorometaxylenol 

Methyl-p-hydroxybenzoate 

Propyl-p-hydroxybenzoate 

Benzyl-p-hydroxybenzoate 

Butyl -p-hydroxybenzoate 

Broad spectrum 

Quaternary

Chlorhexidine 

Benzethonium chloride 

Benzalkonium chloride 

Cetyl pyridinium chloride 

Cetyl Methyl ammonium  bromide

Broad spectrum 

Mercurials

Phenyl mercuric acetate 

Sodium Ethyl mercuric 

Thiosalicylate 

Broad spectrum

 

 

 

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