Kaolin (China Clay) – Al₂Si₂O₅(OH)₄
CAS Number: 1332-58-7
Appearance: Fine white to off-white powder
Purity: Typically ≥95% (natural clay mineral)
Description:
Kaolin, also known as china clay or caolin, is a naturally occurring clay mineral primarily composed of kaolinite, a hydrated aluminum silicate. It is soft, chemically inert, and has excellent whiteness and plasticity, making it suitable for a wide range of industrial and commercial uses.
Applications:
Industrial Uses
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Ceramics & Porcelain: Widely used in the production of tiles, sanitaryware, and high-end porcelain due to its plasticity and firing properties.
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Paper Industry: Used as a coating and filler to improve smoothness, brightness, and printability.
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Paints & Coatings: Acts as a functional extender to improve durability, gloss control, and pigment dispersion.
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Rubber & Plastics: Enhances mechanical strength, chemical resistance, and dimensional stability.
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Construction Materials: Added to cement, mortar, and other building products for workability and rheology control.
Pyrotechnics & Fireworks
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Used as a non-combustible binder and filler in stars, comets, and lance compositions.
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Serves as a refractory component in some fountain and spark compositions.
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Enhances mechanical strength without adding fuel or reactive load.
Cosmetics & Pharmaceuticals
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Used in facial masks, powders, and ointments for its absorbent, soothing, and mattifying properties.
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In pharmaceuticals, acts as an excipient and gentle stomach soother.
Typical Properties:
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pH: 4.5 – 7.5
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Particle size: <45 μm (325 mesh)
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Oil absorption: 30–40 g/100g
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Moisture: <1%
Handling & Storage:
Store in a dry, cool, and well-ventilated area. Avoid generating dust. Use personal protection if handling large volumes.
Packaging Sizes:
Available in 1 kg, 5 kg, 25 kg paper bags or bulk upon request.
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