Class 12 Chemistry Chemistry In Everyday Life Antiseptics & disinfectants

Antiseptics & disinfectants

  • Antiseptics are applied to the living tissues such as wounds, cuts, ulcers and diseased skin surfaces.
  • Examples are furacine, soframicine, etc. These are not ingested like antibiotics.
  • Commonly used antiseptic, Dettol is a mixture of chloroxylenol and terpineol. Class_12_Chemistry_Isolation_Of_Elements_Diagram17
  • Bithionol (the compound is also called bithionol) is added to soaps to impart antiseptic properties.
  • Iodine is a powerful antiseptic. Its 2-3 per cent solution in alcohol water mixture is known as tincture of iodine.
  • It is applied on wounds.
  • Iodoform (CHI3) is also used as an antiseptic for wounds.
  • Boric acid in dilute aqueous solution is weak antiseptic for eyes.



  • They are applied to inanimate objects such as floors, drainage system, instruments, etc. Same substances can act as an antiseptic as well as disinfectant by varying the concentration.
  • For example, 0.2 per cent solution of phenol is an antiseptic while its one percent solution is disinfectant.
  • Chlorine in the concentration of 0.2 to 0.4 ppm in aqueous solution and sulphur dioxide in very low concentrations, are disinfectants.


Antifertility Drugs

  • These are the chemical substances which are used to control pregnancy.
  • They are also called as oral contraceptives.
  • Birth control pills essentially contain a mixture of synthetic estrogen and progesterone derivatives. Both of these compounds are hormones.
  • It is known that progesterone suppresses ovulation.
  • Synthetic progesterone derivatives are more potent than progesterone.
  • Norethindrone is an example of synthetic progesterone derivative most widely used as antifertility drug. The estrogen derivative which is used in combination with progesterone derivative is ethynylestradiol (novestrol).


Share these Notes with your friends  

< Prev Next >

You can check our 5-step learning process