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Q: Eye Ointment base should melt at
  • A. Near to body temperature
  • B. Room temperature
  • C. Both A and B
  • D. None of these
Correct Answer: Option A - white petrolatum is a semisolid mixture of hydrocarbons and is suitable for ophthalmic ointment preparation due to the following properties : (1) Its melting point ranges from 36-60ºC and therefore, the ointment viscosity will decrease following application to the eye. (2) It does not cause irritation of the human eye.
A. white petrolatum is a semisolid mixture of hydrocarbons and is suitable for ophthalmic ointment preparation due to the following properties : (1) Its melting point ranges from 36-60ºC and therefore, the ointment viscosity will decrease following application to the eye. (2) It does not cause irritation of the human eye.

Explanations:

white petrolatum is a semisolid mixture of hydrocarbons and is suitable for ophthalmic ointment preparation due to the following properties : (1) Its melting point ranges from 36-60ºC and therefore, the ointment viscosity will decrease following application to the eye. (2) It does not cause irritation of the human eye.