Phosphorus, red yellow

Parlon, Chlorinated Rubber Plaster of Paris (Gypsum, Calcined) Phosphorus, Red-Yellow Phosphorus, Stabilized Photoflash Powder... 

Figure 2.7 Structures of a lysine-specific hystone demethylase 1 (LSDl). In all three pictures, the LSDl protein is in the same orientation, (a) The human LSDl structure (PDB code 2HK0) with the tower domain (top two helices), just below the AOL domain, (harboring the FAD cofactor and the substrate-binding subdomain).The protein is represented schematically, with the helices, p-strands and coil regions colored in red, yellow and green, respectively. The FAD cofactor is in stick representation with the carbon, oxygen, phosphorus and nitrogen...

Residues of inflammable chemicals, particularly phosphorus (either yellow or red), must be disposed of with especial care. If possible, they should be burned or thrown into jars containing water. 

Phosphorus (red more readily than yellow), arsenic, antimony, mercury, iron, gold and platinum are converted into chlorides, with liberation of sulphur dioxide, e.g. 

Energy also is involved in transitions from one allotropic form to another, or from one crystal form to another. To change a mole of red phosphorus to yellow phosphorus, we must supply 4.22 kilocalories (AHT = +4.22 kcal/mole), and when 1 mole of yellow silicon disulfide changes to white silicon disulfide, 3.11 kcal is liberated (AHT = -3.11 kcal/mole). 

A review of the alleged allotropes of phosphorus reduces their number to four, namely, the a- and/3-forms of yellow phosphorus, red or violet phosphorus, and black phosphorus. Most of the work of various investigators has been directed towards elucidating the nature of red phosphorus, and of the transformation of yellow to red phosphorus and conversely. Red phosphorus was formerly considered to be amorphous, and it was often called amorphous phosphorus. The term amorphous, however, here referred more to the general appearance of the powder rather than to its minute structure. J. W. Retgers 5 showed that the particles of ordinary red phosphorus are rhombohedral crystals, which are well developed in those of W. Hittorf s violet phosphorus. All four varieties are therefore crystalline. J. W. Terwen has reviewed this subject in a general way and M. Copisarow discussed the theory of allotropy,... 

Osmium tetraoxide (osmic acid) Pentachlorophenol Perchloric acid Phosphorus pentasulfide Phosphorus pentoxide Phosphorus, red Phosphorus, yellow or white Picric acid, trinitrophenol Potassium cyanide Potassium perchlorate Potassium sulfide Potassium, metal Pyridine flammable Selenium Silver oxide Silver cyanide Sodium metal lump Sodium arsenate Sodium arsenite Sodium azide... 

Phosphoms exists in at least three allotropic forms. Allotropes are forms of an element with different physical and chemical properties. The three main allotropes are named for their colors white phosphorus (also called yellow phosphorus), red phosphorus, and black phosphorus (also called violet phosphorus). These allotropes have different physical and chemical properties. 

Synonyms Elemental phosphorus White phosphorus Red phosphorus Yellow phosphorus Chemical Formula P... 

Manuf./Distrib. Aldrich http //www.sigma-aldrich.com, FMC http //www.fmc.com, Fluka http //www.sigma-aldrich.com, Hummel Croton http //www.hummeicroton.com, Rhodia HPCII http //www. rhodia-hpcii. com Sigma Solatia http //www.soiutia.com, http //www. coatings-soiutia. com See a/so Phosphorus, red Phosphorus, yellow... 

Phosphorus Phosphorus, red Phosphorus, yellow Potassium Potassium chloride Potassium nitrate Potassium phosphate tribasic Potassium sulfate Sodium borate Sodium borate decahydrate Sodium chloride Sodium nitrate Sodium phosphate dibasic anhydrous Sulfuric acid Urea... 

Calcium phosphate tribasic Phosphorus Phosphorus, red Phosphorus, yellow phosphors... 

Polymeric phosphorus nitride is obtained when phosphine and nitrogen react at 280-290°C. This can be represented approximately as (4.180). A red/yellow polymeric variety can also be obtained directly from PCI3 and ammonia (7.33). If Pjo and P60 can exist (Figures 4.7 and 4.8), it seems not unlikely that similar polyhedra containing alternate P and N atoms will also exist, that is. 

If PCI3 is added to a saturated solution of NH3 in chloroform at -78°C, water-soluble phosphorus triamide is produced (7.32). On the other hand, if an excess of PCI3 is added rapidly to liquid NH3, the reaction goes according to (7.33), giving an amorphous red/yellow product. 

Fig. 2 Ball and stick representations (Mercury 3.5) of the crystal structure of MEMKEU, the phosphate of thiamin, a vitamin of the B complex, wherein sulfur forms two chalcogen bonds dotted blue lines) thanks to the entrance of chloride and phosphate anions on the extended covalent bonds at sulfur SENGOH, 2-phenyl-l,2-2//-benzisoselenazole-3-one wherein selenium forms one directional chalcogen bond. CSD Refcodes and the Normalized contacts Nc, see onwards) are given. Color code gray, carbon sky-blue, nitrogen red, oxygen ocher, phosphorus light yellow, sulfur green, chlorine dark yellow, selenium...

Looking around the imaginary ekko cell, if you put on imaginary chemical glasses that allowed you to see different elements in different colors, four colors would dominate your view, one for each of the CHON elements. In the Chain of Life sculpture, these were black, green, blue, and silver. After that, you would next see two more colors, for phosphorus (red, maybe) and sulfur (yellow, definitely). These colors would be in two different places. 

Place 125 ml. of glacial acetic acid, 7 -5 g. of purifled red phosphorus (Section II,50,d) and 2 5 g. of iodine in a 500 ml, round-bottomed flask fitted with a reflux condenser. Allow the mixture to stand for 15-20 minutes with occasional shaking until aU the iodine has reacted, then add 2 5 ml. of water and 50 g, of benzilic acid (Section IV,127). Boil the mixture under reflux for 3 hours, and filter the hot mixture at the pump through a sintered glass funnel to remove the excess of red phosphorus. Pour the hot filtrate into a cold, weU-stirred solution of 12 g. of sodium bisulphite in 500 ml, of water the latter should be acid to litmus, pro duced, if necessary, by passing sulphur dioxide through the solution. This procedure removes the excess of iodine and precipitates the diphenyl-acetic acid as a fine white or pale yellow powder. Filter the solid with suction and dry in the air upon filter paper. The yield is 45 g., m.p. 

Phosphorus exists in four or more allotropic forms white (or yellow), red, and black (or violet). Ordinary phosphorus is a waxy white solid when pure it is colorless and transparent. White phosphorus has two modifications alpha and beta with a transition temperature at -3.8oC. 

Phosphorus(III) Oxide. Phosphoms(III) oxide [12440-00-5] the anhydride of phosphonic acid, is formed along with by-products such as phosphoms pentoxide and red phosphoms when phosphoms is burned with less than stoichiometric amounts of oxygen (62). Phosphoms(III) oxide is a poisonous, white, wax-like, crystalline material, which has a melting point of 23.8°C and a boiling point of 175.3°C. When added to hot water, phosphoms(III) oxide reacts violentiy and forms phosphine, phosphoric acid, and red phosphoms. Even in cold water, disproportionation maybe observed if the oxide is not well agitated, resulting in the formation of phosphoric acid and yellow or orange poorly defined polymeric lower oxides of phosphoms (LOOP). 

A reaction of mixed molybdenum polyoxometalates (POMs) with cyanine dye has been used for highly selective and sensitive spectrophotometric determination of phosphorus(V) and arsenic(V). Color of the solution is considerably changed by reaction of Keggin POMs with styrene cyanine dyes. Derivatives of l,3,3-threemethyl-3//-indol - astrazone violet (AV 3R), astrazone rose, astrazone yellow, astrazone red were investigated. 

Bromine is a dark red volatile liquid with a pungent odour. The vapour attaeks the eyes and mueous memhranes. It eomhines spontaneously and with deflagration with phosphorus, arsenie and potassium and with many other elements when warmed. It hleaehes litmus and turns stareh paper orange/yellow. 

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