Pesticide cyclic hydrocarbon

Cyclic Hydrocarbons. The cyclic hydrocarbon intermediates are derived principally from petroleum and natural gas, though small amounts are derived from coal. Most cycHc intermediates are used in the manufacture of more advanced synthetic organic chemicals and finished products such as dyes, medicinal chemicals, elastomers, pesticides, and plastics and resins. Table 6 details the production and sales of cycHc intermediates in 1991. Benzene (qv) is the largest volume aromatic compound used in the chemical industry. It is extracted from catalytic reformates in refineries, and is produced by the dealkylation of toluene (qv) (see also BTX Processing). 

Cyclic hydrocarbons with chlorine substituents that block ring oxidation are resistant to biodegradation and thus accumulate in the environment and persist for long periods in animals once they are absorbed. The persistence of organochlorine pesticides... 

Valuable minor components Fat degradation products Contaminants Tocopherols, sterols, squalene, oryzanol Trans-fatty acids, polymeric and oxidized triacylglycerols, cyclic fatty acids Pesticides, polycyclic aromatic hydrocarbons, polychlorinated biphenyls, dioxins, furans ... 

Agrisynth BLO. [ISP] y-Bubrolactone solvent for PAN, fluorinated hydrocarbons, cdlttlose triacetate, shellac used in paint removers, petrd. processing, specialty inks intermediate for aliphatic and cyclic congxls. reaction and diluent solvent for pesticides. 

Chem. Descrip. y-Butyrolactone CAS 96-48-0 EINECS/ELINCS 202-509-5 Uses Solvent for PAN, PS, fluorinated hydrocarbons, cellulose triacetate, shellac, used in paint removers, petrol, processing, hectograph process, specialty Inks Intermediate for aliphatic and cyclic compds. reaction and diluent solvent for pesticides dyeing of acetate wetting agent for cellulose acetate films, fibers solvent welding of plastic films in adhesive applies. 

Table 5,3 Examples of QSAR models for estimating toxicity to fish of non-polar non-specific toxicants (e.g. alkanes, alkenes, saturated and unsaturated halogenated aliphatic hydrocarbons, basic ethers, cyclic ethers, ketones, amides, secondary and tertiary aliphatic and aromatic amines, alkylbenzenes, halogenated benzenes, piperazines, pyrimidines, polychlorinated hydrocarbon pesticides) log LC50 correlations with various parameters. 

Cyclopentadiene [542-92-7] (CPD), CsHe, (1), and its more stable dimer, dicy-clopentadiene [77-73-6] (DCPD), C10H12, (2), are the major constituents of hydrocarbon resins, cyclic olefin polymers, and a host of specialty chemicals. They can be transformed into many chemical intermediates used in the production of pharmaceuticals, pesticides, perfumes, flame retardants, and antioxidants. Because of their wide industrial uses, their chemistry has been extensively investigated and documented. Numerous reviews (1-12) have been published on the subject. The production processes and industrial uses of CPD and DCPD are summarized in Reference 13. In addition to the classical organic reactions, CPD forms organic metallic complexes, ferrocene, with transition metals (14). Some of these complexes have been established as excellent olefin polymerization catalysts. Several reviews have been published on this rapid growing field (15-19) (see Single-Site Catalysts). 

Using microbore LC columns, a separation method was developed for a series of weakly basic cyclic and noncyclic secondary amines, which were identified as components of coal-derived solvents. As shown in another study, using normal HPLC on silica gel with Freon-113 elution, model mixtures of aliphatic and aromatic hydrocarbons and nonpolar constituents can be separated in coal-liquefaction process solvents. Encouraging results were obtained on both semipreparative (4.6 mm i.d.) and microbore (1 mm i.d.) columns. According to further reports, carbamate pesticides, polymer additives and solvent-refined coal were analysed, and the components of bergamot oil can be identified. GPC/FT-IR can be used to detect components of cold-rolling oil and to analyse polymers, whereas SEC/FT-IR can be applied to the analysis of coal liquids and to improve detection and identification of proteins. 

Gel permeation chromatography Phenols, phthalate esters, nitrosamines, organochlorine pesticides, PCBs, nitroaromatics, cyclic ketones, polycyclic aromatic hydrocarbons, chlorinated hydrocarbons, organophos-phorus pesticides, priority pollutant semivolatiles... 

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