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4-Fluorobromobenzene is synthesized via bromination of fluorobenzene in the presence of a Lewis acid catalyst such as iron(III) bromide or aluminium tribromide. [2]4-Bromofluorobenzene is regarded by the Toxic Substances Control Act as a high production volume chemical, that is, a chemical that 1 million pounds (about 500 tonnes) per year is either produced in or imported to the United States.
Xantphos is an organophosphorus compound derived from the heterocycle xanthene.It is used as a bidentate diphosphine ligand and is noteworthy for having a particularly wide bite angle (108°). [1]
Pentafluoropropane is produced by Honeywell and in Asia by Sinochem. [8] Honeywell markets HFC-245fa under the Enovate and Genetron 245fa brand names. AlliedSignal, who adopted the Honeywell name after acquiring it, decided in 1999 to provide a non ozone depleting blowing agent as an alternative for dichlorofluoroethane (HCFC-141b) and trichlorofluoromethane (CFC-11).
12440–00–5 P 4 O 10: phosphorus decaoxide: 16752–60–6 P 4 S 3: phosphorus trisulfide: 1314–51–8 P 4 S 4: phosphorus tetrasulfide: 39350–99–7 P 4 S 6: phosphorus hexasulfide: 131105–01–6 P 4 S 7: phosphorus heptasulfide: 15578–16–2 P 4 S 9: phosphorus nonasulfide: 25070–46–6 P 4 S 10: phosphorus pentasulfide: 1314 ...
Perfluoro(2-methyl-3-pentanone) is a fluorinated ketone with the structural formula CF 3 CF 2 C(=O)CF(CF 3) 2, a fully-fluorinated analog of ethyl isopropyl ketone.It is used as an electronics coolant liquid and fire protection fluid sold commercially by 3M under brand names such as Novec 1230, Novec 649, and FK-5-1-12.
4-Nitrotoluene or para-nitrotoluene is an organic compound with the formula CH 3 C 6 H 4 NO 2. It is a pale yellow solid. It is a pale yellow solid. It is one of three isomers of nitrotoluene .
The check digit is found by taking the last digit times 1, the preceding digit times 2, the preceding digit times 3 etc., adding all these up and computing the sum modulo 10. For example, the CAS number of water is 7732-18-5: the checksum 5 is calculated as (8×1 + 1×2 + 2×3 + 3×4 + 7×5 + 7×6) = 105; 105 mod 10 = 5.
An obvious synthesis route to α-alaninediacetic acid is from racemic α-DL-alanine, which provides racemic α-ADA by double cyanomethylation with methanal and hydrogen cyanide, hydrolysis of the intermediately formed diacetonitrile to the trisodium salt and subsequent acidification with mineral acids in a 97.4% overall yield. [4]