Kaolin - Materials / Alfa Chemistry

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Kaolin

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Catalog Number

ACMA00014239

Product Name

Kaolin

Category

Ceramic Materials

Description

Kaolin appears as odorless white to yellowish or grayish powder. Contains mainly the clay mineral kaolinite (Al2O3(SiO2)2(H₂O)2), a hydrous aluminosilicate. Kaolinite has mp 740-1785°C and density 2.65 g/cm³. Kaoline is insoluble in water but darkens and develops a earthy odor when wet.;DryPowder; DryPowder, Liquid; DryPowder, PelletsLargeCrystals, WetSolid; DryPowder, WetSolid; Liquid; OtherSolid; PelletsLargeCrystals; WetSolid; WetSolid, Liquid;WHITE POWDER.;White to yellowish or grayish powder. Odorless.;White to yellowish or grayish powder. [Note: When moistened, darkens & develops a clay-like odor.]

IUPAC Name

oxo-oxoalumanyloxy-[oxo(oxoalumanyloxy)silyl]oxysilane;dihydrate

Molecular Weight

258.16g/mol

Molecular Formula

H2Al2Si2O8H₂O;Al2Si2O5(OH)4;Al2H4O9Si2

Canonical SMILES

O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O

InChI

InChI=1S/2Al.O5Si2.2H₂O.2O/c;;1-6(2)5-7(3)4;;;;/h;;;2*1H2;;/q2*+1;-2;;;;

InChI Key

NLYAJNPCOHFWQQ-UHFFFAOYSA-N

Density

1.8 to 2.6 (NIOSH, 2016);2.65 g/cu cm;Relative density (water = 1): 2.6;1.8-2.6;1.8-2.6

Solubility

Insoluble (NIOSH, 2016);Insoluble in water;Insoluble in ether;Insoluble in dilute acids and alkali hydroxides;Solubility in water: insoluble;Insoluble

Color/Form

White or yellowish-white, earhty mass or white powder; unctuous when moist;White to yellowish or grayish powder [Note: When moistened, darkens...];Triclinic;White or near white ... pseudohexagonal flakes;Fine white to light-yellow powder

Complexity

167

Covalently-Bonded Unit Count

EC Number

310-194-1;619-103-2

Exact Mass

257.902462g/mol

Formal Charge

Heavy Atom Count

ICSC Number

1144

MeSH Entry Terms

Kaolin;Kaolinite

Monoisotopic Mass

257.902462g/mol

Odor

When moistened ... develops a clay-like odor

Other Experimental

Most kaolin clays have medium bulk density, low abrasion, and compatibility with majority of toxicants;Some grades have fine particle size, high adsorption, and suspension properties;Grindability good if active ingredient is high mp solid: oil adsorption 30-35 g/100 g oil; bulk density, 20-40 lb/cu foot; and pH, 5-6;Kaolin is a unique industrial mineral because it is chemically inert over a relatively wide pH range ... is white or near white; has a good covering or hiding power when used as a pigment or extender in coating and filling; is soft and nonabrasive; has low conductivity of both heat and electricity ...;Mohs Hardness = 2.3;Fusion temp = 1850 °C; Valley abrasion number: 4 to 10; dry brightness (1t 457 nm): 75-91%;A white-burning aluminum silicate that, due to its great purity, has a high fusion point and is the most refractory of all clays. ... Has high lubricity (slipperiness)

Refractive Index

Index of refraction = 1.549; 1.564; 1.565

Rotatable Bond Count

RTECS Number

GF1670500

Vapor Pressure

0 mm Hg (approx) (NIOSH, 2016);0 mmHg (approx);0 mmHg (approx)

Viscosity

Low viscosity

MSDS

Download MSDS

COA