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Pyridinium Dichromate

Pyridinium dichromate is a pyridinium salt of dichromate. It is a strong oxidizing agent which can convert primary and secondary alcohols to aldehydes and ketones respectively.

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Pyrophyllite

Pyrophyllite is a phyllosilicate mineral composed of aluminium silicate hydroxide. It occurs in two more or less distinct varieties, namely, as crystalline folia and as compact masses; distinct crystals are not known. It occurs in phyllite and schistose rocks, often associated with kyanite, of which it is an alteration product. It also occurs as hydrothermal deposits. Typical associated minerals include: kyanite, andalusite, topaz, mica and quartz. The compact variety of pyrophyllite is used for slate pencils and tailors chalk, and is carved by the Chinese into small images and ornaments of various kinds. Other soft compact minerals (steatite and pinite) used for these Chinese carvings are included with pyrophyllite under the terms agalmatolite and pagodite. Pyrophyllite is easily machineable and has excellent thermal stability. Therefore it is added to clay to reduce thermal expansion when firing but it has many other industry uses when combined with other compounds, such as in insecticide and for making bricks. It is also widely used in high-pressure experiments, both as a gasket material and as a pressure-transmitting medium.

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Pyruvic Acid

Pyruvic Acid is an organic acid, a ketone, as well as the simplest of the alpha-keto acids.Pyruvic acid can be made from glucose through glycolysis, converted back to carbohydrates via gluconeogenesis, or to fatty acids through acetyl-CoA. It can also be used to construct the amino acid alanine and be converted into ethanol.Pyruvic acid is a colorless liquid with a smell similar to that of acetic acid and is miscible with water. In the laboratory, pyruvic acid may be prepared by heating a mixture of tartaric acid and potassium hydrogen sulfate by the oxidation of propylene glycol by a strong oxidizer or by the hydrolysis of acetyl cyanide, formed by reaction of acetyl chloride with potassium cyanide.

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