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| CAS No.: | 1332-58-7 |
|---|---|
| Name: | Kaolin |
| Molecular Structure: | |
|
|
|
| Formula: | Al2O3.2SiO2.2H2O |
| Molecular Weight: | 258.16 |
| Synonyms: | Argilla;Kaoline;organically modified;Aluminum silicate hydroxide,Bolus,Hydrated aluminum si;CLAY;metahalloysite;Kaolin clay;Catalpo;Buca;Aluminum silicate hydroxide,Bolus,China clay;Kaolin(superfine);SP-33;BOLUS;REDCLAY;Kaowool;Aluminum silicate hydroxide,Bolus,Hydrated aluminum silicate; |
| EINECS: | 265-064-6 |
| Density: | 2.6 g/cm3 |
| Melting Point: | 1750 °C |
| Solubility: | insoluble H2O, dilute acids and alkali hydroxides [HAW93] |
| Appearance: | off-white powder |
| Hazard Symbols: |
 Xn
|
| Safety: | 22-24/25 |
| PSA: | 114.43000 |
| LogP: | -1.34560 |
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| Conditions | Yield |
|---|---|
| In water High Pressure; phillipsite and an aq. soln. of AlCl3 is encapsulated in a gold bomb, heating to 300°C at a pressure of 30 MPa for 4 weeks, quenching to room temp.; XRD; |
| Conditions | Yield |
|---|---|
| mixt. (Al2Si2O5(OH)4:Al(OH)3 = 1:4) dry ground in aplanetary ball mill at a rate of 250 rpm for 5 min or 4 h; not isolated; detn. by NMR spectroscopy; |
- 1332-58-7
kaolin
- 12393-56-5
sodium hydroxosodalite
| Conditions | Yield |
|---|---|
| With NaOH In water kaolinit sintered at 1723°K with NaOH, thermal treatment at 873 K for 3 h in vacuum;; |
- 1332-58-7
kaolin
| Conditions | Yield |
|---|---|
| at 893 K for 143 h; stoichiometric mixture of K2SO4 and kaolinite; |
- 1332-58-7
kaolin
| Conditions | Yield |
|---|---|
| With NaOH In water hydrothermal syntheses (autoclave), at 410°K, for several days;; MAS-NMR and X-Ray diffraction;; |
| Conditions | Yield |
|---|---|
| In neat (no solvent, solid phase) milling kaolin, Si and SiO2 for 20 h in hexane, drying, pressing into disks (8 MPa), heating at 1270°C for 8 h (10% H2 in N2); |
- 1332-58-7
kaolin
- 1333-84-2, 1344-28-1
aluminum oxide
| Conditions | Yield |
|---|---|
| In neat (no solvent) mixing and homogenized, melting (Pt crucible, 1400 - 1450°C); pouring (metal plate), remelting (800°C, 1 h); |
- 1332-58-7
kaolin
- 1333-84-2, 1344-28-1
aluminum oxide
| Conditions | Yield |
|---|---|
| In neat (no solvent) mixing and homogenized, melting (Pt crucible, 1400 - 1450°C); pouring (metal plate), remelting (800°C, 1 h); |
- 1332-58-7
kaolin
- 1333-84-2, 1344-28-1
aluminum oxide
| Conditions | Yield |
|---|---|
| In neat (no solvent) mixing and homogenized, melting (Pt crucible, 1400 - 1450°C); pouring (metal plate), remelting (800°C, 1 h); |
- 1332-58-7
kaolin
- 1333-84-2, 1344-28-1
aluminum oxide
| Conditions | Yield |
|---|---|
| In neat (no solvent) mixing and homogenized, melting (Pt crucible, 1400 - 1450°C); pouring (metal plate), remelting (800°C, 1 h); |
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Standards and Recommendations
OSHA PEL: TWA Total Dust: 10 mg/m3; Respirable Fraction: 5 mg/m3
ACGIH TLV: TWA 2 mg/m3; Respirable Fraction; Not Classifiable as a Human Carcinogen
Specification
This chemical is called Kaolin, and it's also named as Clay (kaolin). With the molecular formula of Al2O3.2SiO2.2H2O, its product categories are UVCBs-Inorganic; Cosmetic Ingredients & Chemicals. The CAS registry number of this chemical is 1332-58-7. Additionally, it's insoluble in water, ethanol, acid and alkali. Keep it in the cool and dry place where the room is ventilated.
Preparation of this chemical: Take crystalline rocks of granite, gneiss and ground them into a muddy, washing the sand and processing them with dilute inorganic acid. After repeated washing and dehydration from the more than 330 °C, you will finally get the Kaolin.
Uses of Kaolin: The Kaolin is used on porcelain and ceramics, refractories, coatings, optical glass, all kinds of electromagnetic insulator. It's also used in paper, rubber, plastics industry and manufacturing special ceramic. Moreover, it play a role of separation and purification for serum coagulation.
When you are using Kaolin, please be cautious about it as the following: Do not breathe dust. Avoid contacting with skin and eyes.
You can still convert the following datas into molecular structure:
(1)InChI=1S/2Al.O5Si2.2H2O.2O/c;;1-6(2)5-7(3)4;;;;/h;;;2*1H2;;/q2*+1;-2;;;;;
(2)InChIKey=NLYAJNPCOHFWQQ-UHFFFAOYSA-N;
(3)Smiles[SiH](=O)(O[SiH](=O)O[AlH]=O)O[AlH]=O.O.O;