More Chemical Control Methods

Question 1

How do surfactants/ detergents work

Answer 1

Decreasing surface tension

Question 2

There are three types of surfactants/ detergents (anionic, nonionic, and cationic). What is a common cationic type

Answer 2

Quaternary ammoniums

Question 3

Three types of phenolics

Answer 3

1. Carbolic acid
2. Cresols
3. Bisphenols

Question 4

What caution should you keep in mind when using Phenolics

Answer 4

Cats

Question 5

Which two heavy metals can be used as disinfectants and antispetics

Answer 5

Silver and Zinc
Ag Zn

Question 6

Which gas is a highly flammable/ explosive and a potent toxin

Answer 6

Ethylene oxide

Question 7

How does Ethylene oxide work

Answer 7

It is a poisonous alkylating agent

Question 8

Ethylene oxide is an effective -cidal, but requires what five conditions

Answer 8

1. Temperature between 50-60 C
2. Pressure
3. Concentration between 500-1000 mg/ L
4. Moisture 40-80%
5. Time 3-6 hours

Question 9

Ethylene oxide gas penetrates well and dissipates slowly which means…

Answer 9

You cant use things you’ve disinfected with it right away. It needs significant aeration time

Question 10

What is used to sterilize things that can.t go through an autoclave

Answer 10

Ethylene oxide gas