Kaolin , Pharmaceutical Grade , 1332-58-7

Synonym(s):
China clay;Kaolin clay;Hydrated aluminum silicate;Aluminum silicate hydroxide;Bolus

CAS NO.：1332-58-7

Empirical Formula: H2Al2O8Si2.H2O

Molecular Weight: 258.16

MDL number: MFCD00062311

EINECS: 310-194-1

PRODUCT Properties

• Melting point: 1750 °C
• Density: 2,6 g/cm³
• refractive index: 1.6200
• storage temp.: no restrictions.
• solubility: Practically insoluble in diethyl ether, ethanol (95%), water, other organic solvents, cold dilute acids, and solutions of alkali hydroxides.
• form: Powder
• color: 75-96, Hunter Brightness
• PH: 6-7 (50g/l, H2O, 20℃)(slurry)
• Water Solubility: insoluble H2O, dilute acids and alkali hydroxides [HAW93]
• Dielectric constant: 1.8 - 2.8（0.0℃）
• Stability: Stable. Substances to be avoided include strong oxidizing agents.
• InChI: InChI=1S/2Al.O5Si2.2H2O.2O/c;;1-6(2)5-7(3)4;;;;/h;;;2*1H2;;/q2*+1;-2
• InChIKey: NLYAJNPCOHFWQQ-UHFFFAOYSA-N
• SMILES: [Si](=O)(O[Al]=O)O[Si](=O)O[Al]=O.O.O
• EPA Substance Registry System: Kaolin (1332-58-7)

Description and Uses

Kaolin or china clay is a naturally occurring, almost white, hydrated aluminum silicate. This material does not exhibit a high degree of slip. Kaolin boasts good absorbency, is dense, and is sometimes used to reduce the bulk densities in loose powder products. It provides a matte surface effect, which can slightly reduce sheen left by some talc products.

Adsorbant.

Safety

• Symbol(GHS): GHS07
• Signal word: Warning
• Hazard statements: H319-H315
• Precautionary statements: P264-P280-P302+P352-P321-P332+P313-P362-P264-P280-P305+P351+P338-P337+P313P
• Safety Statements: 22-24/25
• OEB: B
• OEL: TWA: 10 mg/m3 (total)
• WGK Germany: -
• RTECS: GF1670500
• TSCA: Yes
• HS Code: 25070090
• Hazardous Substances Data: 1332-58-7(Hazardous Substances Data)