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| CAS No.: | 12174-11-7 |
|---|---|
| Name: | ATTAPULGITE |
| Molecular Structure: | |
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| Formula: | Al0.5-1Fe0-0.5HMgO11Si4.4H2O |
| Molecular Weight: | 583.377 |
| Synonyms: | Palygorskite (8CI);200U/P-RVM;ATL 1090;ATT 50;Agsorb LVM-GA 24/48;Amcol FLT;Attaclay;Zeogel; |
| EINECS: | 215-478-8 |
| Density: | 2.2 g/cm3 |
| Flash Point: | n/a |
| Appearance: | solid |
| PSA: | 379.14000 |
| LogP: | -3.74820 |
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Chemistry
Product Name: Palygorscite (12174-11-7)
Stability: Stable
Synonyms of Palygorscite (12174-11-7) : Activated attapulgite ; Attaclay ; Attaclay x 250 ; Attacote ; Attagel ; Attagel 40 ; Attagel 50 ; Attagel 150 ; Attasorb ; Attapulgite ; Diluex ; Min-u-gel 200 ; Min-u-gel 400 ; Min-u-gel fg ; Palygorskit ; Permagel ; Pharmasorb-colloidal ; Rvm-fg ; 200u/p-Rvm ; Zeogel.
Uses
Palygorscite (12174-11-7) is mainly used in the chemical industry and granular urea fertilizer to prevent the solidification agent, rubber processing additives, polyester resin, clay thixotropic thickener, pesticide carrier, 2-aminophenyl catalyst for methane and dichloroethane, plastic Spirit of the filler and foam bleaching agent. Is also widely used in paint, oil, casting, military, building materials, paper, pharmaceutical, printing, and environmental protection departments.
Production
China's current exploitation of small mines, mining and production scale are not large. Mostly open-pit mining, a low degree of mechanization. Beneficiation method is commonly used in hand-selected, and sometimes also used as part of screening to remove coarse impurities. Attapulgite clay processing technology can be divided into extrusion, grinding, heat treatment, add the dispersion agent and surfactant four steps.
Toxicity Data With Reference
| 1. | ihl-rat TCLo:10 mg/m3/6H/13W-I:ETA | BJIMAG British Journal of Industrial Medicine. 44 (1987),749. |
Tumorigenic
Consensus Reports
IARC Cancer Review: Group 3 IMEMDT IARC Monographs on the Evaluation of Carcinogenic Risk of Chemicals to Man . 7 ,1987,p. 117.(World Health Organization, Internation Agency for Research on Cancer,Lyon, France.: ) (Single copies can be ordered from WHO Publications Centre U.S.A., 49 Sheridan Avenue, Albany, NY 12210) ; Animal Limited Evidence IMEMDT IARC Monographs on the Evaluation of Carcinogenic Risk of Chemicals to Man . 42 ,1987,p. 159.(World Health Organization, Internation Agency for Research on Cancer,Lyon, France.: ) (Single copies can be ordered from WHO Publications Centre U.S.A., 49 Sheridan Avenue, Albany, NY 12210) ; Human Inadequate Evidence IMEMDT IARC Monographs on the Evaluation of Carcinogenic Risk of Chemicals to Man . 42 ,1987,p. 159.(World Health Organization, Internation Agency for Research on Cancer,Lyon, France.: ) (Single copies can be ordered from WHO Publications Centre U.S.A., 49 Sheridan Avenue, Albany, NY 12210) .
Safety Profile
Suspected carcinogen with experimental neoplastigenic and tumorigenic data. When heated to decomposition it emits acrid smoke and irritating fumes.
Standards and Recommendations
DFG MAK: Animal Carcinogen, Suspected Human Carcinogen
Specification
Palygorscite (12174-11-7) is a kind of chain structure of a layer of water-rich magnesium silicate clay minerals, as was first discovered in the United States, Georgia, named after Fort bump. Monoclinic, crystal rod, fibrous, internal porous surface, multi-groove, the outer surface and inner surface are well developed, allowing cations, water molecules and organic molecules into a certain size. Conditions can present as impurities in the color white, light gray, light green or light brown. Hardness 2 ~ 3, heated to 700 ~ 800 ℃, the hardness of "5. Density of 2.05 ~ 2.30 g/cm3. Earthy luster. Easy to float on water. Lobes can be bent flat tenacity. Dry with a strong water absorption. Attapulgite clay blue absorption capacity and expansion capacity of glial prices lower than the montmorillonite clay; the attapulgite content of the higher absorption by the stronger force. Exchangeable cations. In the case of water has a high plasticity, in the heat and salt water good stability. In the water without swelling or expansion of small. By magnesium in the formation of volcanic rocks and limestone weathering; also lacustrine deposition, deposition and marine sedimentation lagoon bay product, often with montmorillonite sepiolite, dolomite formation composed of a mixture of clay layers.