Organic Chemistry Nomenclature Rules
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Questions and Answers

What does the first digit in the code represent?

  • The degree of asymmetry in the molecule
  • The number of carbon atoms in the molecule minus one (correct)
  • The number of hydrogen atoms in the molecule plus one
  • The number of fluorine atoms in the molecule

    • What is the purpose of compression in aerosol manufacturing?

  • To remove impurities from the propellant
  • To increase the boiling point of the propellant
  • To liquefy the propellant at room temperature (correct)
  • To mix the propellant with other ingredients

    • What happens to the equilibrium between the liquid and vapor phases when the liquid phase is removed from the container?

  • The equilibrium is disrupted and cannot be reestablished
  • The liquid phase disappears, leaving only the vapor phase
  • The vapor phase disappears, leaving only the liquid phase
  • The equilibrium is reestablished between the remaining liquid and vapor phases (correct)

    • What is the role of the dip tube in an aerosol container?

    <p>To force the liquid phase up into the valve and out of the orifice</p> Signup and view all the answers

    What is the state of fluorinated hydrocarbons at room temperature?

    <p>Gases</p> Signup and view all the answers

    What is the relationship between the degree of asymmetry and the coding system?

    <p>The degree of asymmetry is represented by a single letter</p> Signup and view all the answers

    What is a crucial factor in choosing a container material?

    <p>The pressure of the system</p> Signup and view all the answers

    Why must metal containers for aqueous preparations be internally coated, except for stainless steel?

    <p>To resist corrosion</p> Signup and view all the answers

    What is a disadvantage of using aluminum containers?

    <p>They corrode in pure water and pure ethanol</p> Signup and view all the answers

    What is the purpose of adding 2-3% water to absolute ethanol when using aluminum containers?

    <p>To inhibit the attack of aluminum by ethanol</p> Signup and view all the answers

    What is a characteristic of tinplate containers?

    <p>They are light, cheap, and durable</p> Signup and view all the answers

    What can be added to the inside of tinplate and aluminum containers to increase resistance?

    <p>Organic materials such as epoxy, vinyl, or phenolic resins</p> Signup and view all the answers

    What is the primary factor that affects the performance of an aerosol?

    <p>Nature of product concentrate and amount of propellant</p> Signup and view all the answers

    What is the typical pressure range for space sprays at 21°C?

    <p>30 to 40 psig</p> Signup and view all the answers

    What is the primary purpose of surfactants or emulsifiers in foam aerosols?

    <p>To enhance the emulsion of the liquefied propellant and product concentrate</p> Signup and view all the answers

    What is the typical percentage of propellant in foam aerosols?

    <p>6 to 10%</p> Signup and view all the answers

    Why do fluorinated hydrocarbons not dissolve in the aqueous formulation of foam aerosols?

    <p>Because they are nonpolar</p> Signup and view all the answers

    What is necessary to further mix the propellant throughout the product concentrate in foam aerosols?

    <p>Shaking the package prior to use</p> Signup and view all the answers

    What is the primary advantage of using stainless steel containers for aerosol applications?

    <p>They are extremely strong and resistant to corrosion</p> Signup and view all the answers

    Which type of container is typically used for pharmaceutical products with lower pressure and lower percentage of propellant?

    <p>Glass containers</p> Signup and view all the answers

    What is the primary function of the valve assembly in pharmaceutical aerosols?

    <p>To dispense the product in a specific form and rate</p> Signup and view all the answers

    What determines the physical form of the product discharged from the actuator?

    <p>The design of the inner chamber</p> Signup and view all the answers

    What is the primary limitation of using glass containers for aerosol applications?

    <p>They are limited to products with lower pressure and lower percentage of propellant</p> Signup and view all the answers

    What is the purpose of the actuator in a valve assembly?

    <p>To activate the valve assembly for emission of the product</p> Signup and view all the answers

    What is the primary function of a pressure-reducing valve in a compressed gas filling operation?

    <p>To reduce the pressure of the gas to a level suitable for aerosol containers</p> Signup and view all the answers

    What is the purpose of shaking the container during the filling operation for certain gases?

    <p>To achieve the desired pressure in the head space of the aerosol container</p> Signup and view all the answers

    What is the primary mechanism of product dispensation in a Bag on Valve (BOV) aerosol?

    <p>The product is squeezed out of the bag by the propellant</p> Signup and view all the answers

    What is the purpose of the laminated aluminum bag in a BOV aerosol?

    <p>To contain the product</p> Signup and view all the answers

    What is the advantage of using a pressure-reducing valve in a compressed gas filling operation?

    <p>It reduces the risk of over-pressurization of the container</p> Signup and view all the answers

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