| Source: a mineral with perfect cleavage and soapy feel
Occurs as foliated to fibrous masses, coarse granular at times or fine or cryptocrystalline masses. | TALC : H2Mg3(SiO3)4 or Mg3Si4O10(OH)2:
Syn: French chalk, talcum |
| 1 Most widely used substances in baby powder
2 Origin of talc
3 succeeded in exportation overseas | 1 Hydrated magnesium silicate or TALC
2 Persian through Arabic talc
3 Indian talc |
| Talc Properties | The softest known solid, translucent to opaque
White to gray to green in color(due to iron oxide) , odorless, tasteless
Lubricant, has high luster but low conductivity to heat and electricity thus give its industrial value
Chemically inert, sparingly soluble in dilute mineral acid, insoluble in water |
| Talc Uses | In cosmetics (Talcum powder) ,as lubricant
Dusting powder for coating and dusting pills
As filler in paper manufacture
Astringent in baby powders to prevent rashes
Filtering aid in filtration and clarification of cloudy liquids |
| Source: are clays of very fine particles usually from volcanic ash.
Chemically as Hydrous magnesium-aluminum-calcium silicate called Montmorillonite | BENTONITE
Syn: Whilkinite |
| The name bentonite come from local name __ for its type locality.
It is the official state gem of __ | San Benito County, California |
| Bentonite Properties | Slightly greenish gray or blue, shows a light blue under the UV light
Insoluble in water, HCl and H2SO4
Hexagonal crystals microscopically |
| Bentonite Uses | 1 As gemstone due to its hardness
2 As base in gels,ointments,lipsticks, depilatories and rouge
3 The less absorbent bentonite chiefly in oil industry
4 As suspending and emulsifying agents and base for plasters |
| 1 is from ancient process of pulling wool to remove oil and dust particles with a water slurry of earth.
2 Source
3 Properties | 1 FUELLER’S EARTH
Syn: Floridin, Multani, Mitti
2 Mined in open quarry, it is a nonplastic type of kaolin
Contains aluminum-magnesium silicate
3 White to yellowish gray, odorless, tasteless powder, swells and acquire nonplastic texture in water. |
| Fueller's Earth Uses | 1 Decolorizer for oils and other liquids
2 Clarifying and filtering agent
3 For cleansing of woolen fabrics
4 Used in preparation of dusting powders due to its absorbency |
| Source: a native form of calcium carbonate purified by elutriations | PREPARED CHALK
Syn: Chalk, Creta, Paris-White, Whiting, English White |
| PREPARED CHALK COLLECTION | Mined in open quarry, pulverized and purified by elutriation
The water is removed and the insoluble chalk is settled forming flat cakes known as “whiting”
Further purified for pharmaceutical use |
| PREPARED CHALK properties | Colorless, odorless, white earth, soft to touch
Amorphous and insoluble in water
Effervesce with acids |
| PREPARED CHALK USES | Antacid, antidiarrheals
Dietary supplement
Dusting powder
Abrasive in tooth powders & toothpastes
Used in manufacture of antibiotics |
| Source: natural diatomaceous earth consisting of siliceous skeleton of fossils, purified with dil HCl washings with water and dried | KIESULGHER
Syn: Diatomaceous Earth, Celite Supercel, Industrial earth |
| 1 Kiesulgher Properties
2 USES | 1 Brownish-gray to white light powder
Odorless, tasteless
Smooth and adheres to skin after rubbing, absorbs moisture but not slippery
Does not swell in cresol
2 Filtering medium
For clarification and decoloring of liquids
In manufacture of tooth powders, face powders and nail polish |
| Source: is an ore and chemically contains zinc oxide with small amount of ferric oxide | CALAMINE
Syn: Prepared Calamine |
| 1 Calamine USES
2 Calamine PROPERTIES | 1 Uses:
Topical astringent and skin protectant
Ingredient of lotions and cosmetics
2
Odorless,colorless to light pink, very fine
Insoluble in water, soluble in mineral acids
Contains 99% zinc oxide , 0.5% ferric oxide which gives its color
Calcium should not be present for pharmaceutical purposes |
