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Product Name:Aluminum
Synonyms:ALUMINIUM(WELDINDFUMES);ALMINIUM(PYROPOWDER);Aluminum slug, 3.175mm (0.125in) dia x 6.35mm (0.25 in) length, Puratronic|r, 99.9998% (metals basis);Aluminum slug, 3.175mm (0.125in) dia x 3.175mm (0.125in) length, Puratronic|r, 99.9999% (metals basi;Aluminum wire, 1.5mm (0.059in) dia, annealed, Puratronic, 99.999% (metals basis);Aluminum wire, 2.0mm (0.08in) dia, annealed, Puratronic, 99.9995% (metals basis);Aluminum slug, 3.175mm (0.125in) dia x 3.175mm (0.125in) length, Puratronic, 99.9995% (metals basis);Aluminum slug, 3.175mm (0.125in) dia x 6.35mm (0.25in) length, Puratronic, 99.999% (metals basis)
CAS:7429-90-5
MF:Al
MW:26.98
EINECS:231-072-3
Mol File:7429-90-5.mol
7429-90-5

Use

Aluminum, the third most abundant element in the earth’s crust, is a silvery-white lustrous metal belonging to Group 13 of the Periodic Table. The metal is highly reactive and is protected by a thick transparent oxide layer that gets formed quickly in air. Aluminum and its oxides are amphoteric. Pure aluminum, which exists in a large number of alloys, is extracted from purified bauxite by electrolysis. Its lightness, strength (when alloyed), corrosion resistance and electrical conductivity make aluminum suitable for a variety of uses, including in the construction of vehicles, aircrafts, buildings and overhead power cables. Aluminum (Al) is an important soil constituent. It is toxic to most plants at a soil pH below 6.0. Aluminum ion forms octahedral coordination with water molecules and hydroxyl ions. If soil is not strongly acidic, one (or more) of the water molecules ionizes, releasing the hydrogen ion (H+)in to the solution and increasing the soil acidity. The toxic level of soluble and exchangeable aluminum can be substantially reduced by first raising the soil pH in the range of 5.2 to 5.5 and by further liming to make it in the range of 6.0 to 6.5. In acidic soils, aluminum may compete for uptake with copper and make the soil copper deficient. Molybdenum is adsorbed strongly by oxides of aluminum and iron, thereby making the molybdenum unavailable to plants. Increasing aluminum in the soil solution also restricts the uptake of calcium and magnesium by plants. Aluminum ions are toxic to the roots of many plants such as cotton, tomato, alfalfa, celery, barley, corn, sorghum, and sugar beets. Aluminum toxicity is probably the most important growth limiting factor in many acid soils. The symptoms of aluminum toxicity caused by excess soluble aluminum are not easily recognize in crop plants. White-yellow interveinal blotches form on leaves causing them to dry out and die. Aluminum toxicity also reduces the growth of both shoots and roots. An excess of aluminum interferes with cell division in plant roots, inhibits nodule initiation (by fixing the soil phosphorus to forms that are less available to plant roots), and decreases root respiration. Aluminum interferes with enzymes controlling the deposition of polysaccharides in cell walls and increases cell wall rigidity by cross-linking with pectins. It reduces the uptake, transport, and use of nutrients and water by the plant. Aluminum-injured roots are characteristically stubby and brittle. The root tips and lateral roots thicken and turn brown. The root system as a whole, appears coralline, with many stubby lateral roots but no fine branching. The toxicity problem of aluminum is not economically correctable with conventional liming practices. A genetic approach has the potential to solve the problem of aluminum toxicity in acid soils.

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