What is Talc?
Naturally, Talc is a mineral made up of silicate, magnesium, oxygen and hydrogen; indeed, it is composed of hydrous magnesium silicate with the chemical formula of Mg3Si4O10(OH)2.
Though the composition of Talc usually is close to the foregoing generalized formula, some substitution occurs; for example, a small amount of aluminum or titanium can substitute for silicon; a small amount of iron, manganese, and aluminum can substitute for magnesium; also, a very small amount of calcium can substitute for manganese. When a large amount of iron substitutes for manganese, the mineral is known as Minnesotaite and when a large amount of aluminum substitutes for manganese, the mineral is known as Pyrophyllite. Talc is usually green, white, grey, brown, or colorless. It is a translucent mineral with a pearly luster. It is the softest known mineral, has a hardness of 1 on the Mohs Hardness scale, and can be scratched with a fingernail.
Talc is a monoclinic mineral with a sheet structure similar to the micas. It is a phyllosilicate mineral that is divided into thin sheets. These sheets are held together only by Van der Waals bonds, which allows them to slip past one another easily. This characteristic is responsible for the extreme softness of Talc, its greasy, soapy feel, and its value as a high-temperature lubricant. Small sheets of Talc are flexible but non-elastic; it is not a good conductor of heat and when we touch it we feel greasy. This mineral does not dissolve in water, but it dissolves a little in acidic minerals and does not melt in flames.
Talc powder is used in many products we use every day. Research, clinical evidence and nearly 40 years of studies by independent medical experts around the world continue to support the safety of Talc. Moreover, studies has been done by independent authorities around the world like Food and Drug Administration, and World Health Organization; all studied the potential hazard of biomass and determined that asbestos-free Talc is safe. National Cancer Institute approved that asbestos-free Talc powder would not cause a cancer, too.