ACACIA:
For General use with a mortar and pestle,it far
surpasses any other agent.Attention was called above to the possibility of
water-in-oil (W/O) emulsion being formed accidently with acacia. Powdered acacia
should be used for continental emulsion and granular acacia is preferable for
making a mucilage of acacia.
TRAGACANTH:
This is not a good emulsifying agent by
itself,producing coarse emulsion containing large globules of oil.However,when
it is used in conjunction with good emulsifiers,it produces the necessary viscosity
to prevent rapid creaming.
AGAR:
Agar is likewise not a good emulsifying agent when
used alone,but when it is used with another substance such as acacia ,as in the
N.F,Liquid Petrolatum Emulsion with Phenolphthalein,it adds to the perfection of
emulsion.
CHONDRUS:
In the form of a heavy mucilage, chondrus is used in
the same manner as mucilage of tragacanth. It is not an efficent emulsifying
agent for prescription work but has found its greatest use in industry.
EGG
YOLK:
This is officially used in preparing an emulsion of
cod liver oil and produces a splendid emulsion.The emulsion
can best be preserved with alcohol.
QUILLAJA:
In the form of tincture,quillija produces very good
emulsion with oils.
SOAP:
This has excellent stabilizing powers,the famous
emulsions prepared from 1% solution of sodium oleate and 99% of liquid
petrolatum.
