Page 208 - PG 101-Course notes مذكرة النظري 24-25 with spec

Medicinal plants (PG 101) Level 1 Clinical Pharmacy-PharmD

Kieselguhr (Diatomite) Talc (French chalk, Soapstone)
The pure kieselguhr consists Talc is the purified hydrated

almost of SiO2, whereas the crude magnesium silicate occurring as
product contains about 65-90% massive, foliated structure. The mineral is

of SiO 2, together with organic white (pure form) or in the less pure form
Composition
matter, clay, iron oxide and with grayish or greenish tint (due to

about 5-15% water. presence of iron oxide) and has a pearly

luster. When rubbed on the skin, it has

a feeling of greasiness

▪ As a filter aid for purification ▪ As a filter aid in purification and

of oils, syrups, etc. clarification of cloudy fluids.

▪ As a microbial filter (Briefed ▪ In preparation of dusting powders

filter) for the purpose of of different purposes.

sterilization. ▪ In coating and dusting of pills to

▪ Employed as inactive prevent adhesion.

support of chromatography. ▪ As lubricant for massaging and some

▪ Employed as face powder sports.
Uses
and pills. ▪ In tablet manufacture.

▪ In manufacture of soap, tooth

paste and polishing powder.

▪ In manufacture of dynamite

(as it absorbs

nitroglycerine).

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