suspensions

Question 1

Acacia

Answer 1

Hydrophilic Colloids

Question 2

Tragacanth

Answer 2

Hydrophilic Colloids

Question 3

Celluloses

Answer 3

Hydrophilic Colloids

Question 4

Acacia ideal concentration:

Answer 4

5-15%

Question 5

What is acacia made from?

Answer 5

Extract from acacia tree

Question 6

Does Acacia need preservatives?

Answer 6

Yes!

Question 7

Name two preservatives used to preserve acacia?

Answer 7

Sodium Benzoate for Oral Suspensions
Benzalkonium Chloride for external suspensions

Question 8

What % of alcohol is incompatible with acacia

Answer 8

30% of alcohol

Question 9

Tragacanth is extracted from?

Answer 9

Gummy exudate from the gum tree

Question 10

What is tragacanth similar to?

Answer 10

Similar to acacia

Question 11

Does tragacanth need preservative?

Answer 11

Yes

Question 12

What % alcohol is tragacanth incompatible with?

Answer 12

30% alcohol

Question 13

Name 4 Celluloses

Answer 13

Hydroxyethycellulose
Sodium carboxymethylcellulose
Methylcellulose
Hydroxypropylmethylcellulose

Question 14

Hydroxyethycellulose?

Answer 14

Suspending Agent

Question 15

What concentration is Hydroxyethycellulose used in?

Answer 15

0.5% w/v

Question 16

Hydroxyethycellulose can be used in which solutions? pH wise.

Answer 16

High Acid and alkaline

Question 16

True or False: Hydroxyethycellulose has few incompatibilities

Answer 16

True.

Question 17

What can Hydroxyethycellulose dissolve in (temp. wise)

Answer 17

hot and cold water

Question 18

T/F: Sodium carboxymethylcellulose is as good as hydroxyethycellulose

Answer 18

False. Not as good.

Question 19

Why is sodium carboxymethylcellulose not as good as hydroxyethycellulose?

Answer 19

Has a significant amount of incompatibilities & can’t be used with any acids

Question 20

What concntration is sodium carboxymethylcellulose used in?

Answer 20

0.5-4% w/v

Question 21

Methylcellulose brand names

Answer 21

Methocel-R and Cellothyl-R

Question 22

Is Methylcellulose soluble in hot water?

Answer 22

NO.

Question 23

What water temperature is methyl cellulose soluble at?

Answer 23

Cold or refrigerated water

Question 24

What happens when you place methyl cellulose at room temperature?

Answer 24

It forms clumps that can eventually dissolve.

Question 25

What concentration is methyl cellulose used at?

Answer 25

1-2%

Question 26

Is hydroxypropylmethylcellulose soluble in water?

Answer 26

Insoluble in water above 45 F

Question 27

What concentration is hydroxypropylmethylcellulose used at?

Answer 27

0.5-1%

Question 28

Two types of clays

Answer 28

Bentonite and Veegum

Question 29

Bentonite: for internal or external use?

Answer 29

External only.

Question 30

Does Bentonite dissolve in water?

Answer 30

It does not. But it can absorb 12 x its own volume

Question 31

What is bentonite incompatible with?

Answer 31

Alcohol and in acidic pHs

Question 32

does bentonite require a preservative?

Answer 32

Yes. Requires a preservative

Question 33

What concentration is Bentonite used in?

Answer 33

2% w/v

Question 34

Can Veegum be used internally or externally?

Answer 34

Internally.

Question 35

What is veegym incompatible with?

Answer 35

In acidic pHs and alcohols

Question 36

Does veegum require a preservative?

Answer 36

Yes

Question 37

What conc. % is veegum used in?

Answer 37

2& w/v