Antiseptic & Disinfectant

Antiseptic & Disinfectant

Antiseptics are the agents that are used on living tissues & act as
antimicrobial but don’t kill them necessarily.


Disinfectants are agents which are applied on inanimate objects & kill the
microbes outright.     

When the
word end with

 cide   means to kill the
microbes e.g. bactericide means to kill bacteria

  stat means to prevent the growth (multiplications) of microbes

E.g. bacteriostatic means to prevent the growth of bacteria.

Classification of Antiseptic & Disinfectant:-

Phenols & related compound: Phenol,
Chlorocresol. Chloroxylenol, Hexachlorophene

Alcohols & related compound: Ethanol, Isopropyl alcohol

Aldehyde: Formaldehyde

Carboxylic acid and their derivatives: Benzoic acid, Methyl P- hydroxy benzoate.


a) Chlorophors: e.g. Chloramines.

b) Iodophors:   e.g. Povidone –iodine, Iodoform

Heavy metal compound:

a) Organic mercurial’s: 

b) Silver compound: Silver
sulphadiazine, silver protein

Quaternary ammonium compound /cationic compound: Benzalkonium chloride, cetrimide.

Dyes: Proflavin, brilliant

Miscellaneous agents

a) Topical – Nitorfurazone

b) Urinary antiseptic –Nitrofurantoin

/Proflavin Hemisulphate / Neutral Hemisulphate

Structure of Proflavin: