Tar pitch formula. Dec 26, 2018 · Coal Tar Pitch.

Tar pitch formula (Ref. Studies of coke-oven pitch indicate that coal-tar pitch contains: four-membered aromatic hydrocarbon ring systems (e. Coal tar is noteworthy as one of the first – if not the first – chemical substances documented to cause cancer through occupational exposures. March 2002. Pitch soft coal tar pitch distillates, coal tar, middle Clinical Chloride meter,M926S MK2 W/RS232. Coal tar pitch is a soft to hard and brittle substance containing chiefly aromatic resinous compounds along with aromatic and other hydrocarbons and their derivatives; it is used chiefly as road tar, in waterproofing roofs and other structures There is strong evidence from experimental data that coal-tar pitch has a genotoxic mechanism of action. Common Name: COAL TAR PITCH Synonyms: Coal Tar Pitch Volatiles; Coal Tar; Pitch CAS No: 65996-93-2 Molecular Formula: Mixture RTK Substance No: 0519 Description: Dark brown to black, thick liquid with a strong odor HAZARD DATA Hazard Rating Firefighting Reactivity 4 - Health 3 - Fire 0 - Reactivity DOT#: UN 1136 ERG Guide #: 128 Pitch, coal tar, high-temp. 1978; NIOSH/CEC/IPCS: International Chemical Safety Cards - Coal Tar Pitch. 3). The heating or partial burning of wood to make charcoal yields tar as a byproduct and is an ancient method for the production of both tar and pitch. There is strong evidence from experimental data that coal-tar pitch has a genotoxic mechanism of action. [2] Both "tar" and "pitch" are applied to viscous forms of asphalt, such as the asphalt found in naturally occurring tar pits (e. Pitch produced from petroleum may be called bitumen or asphalt, while plant-derived pitch, a resin, is known as rosin in its solid Coal tar pitch is mainly used as a binder for aluminum smelting electrodes, but is also used in coating surfaces, in roofing materials, to impregnate and strengthen refractory brick and is used to produce pitch coke. 3) The purpose of this work was to evaluate the sampling and analytical method routinely Dec 18, 2024 · The crude tar containsa large number of organiccompounds, such as benzene, naphthalene,methylbenzene, phenols,etc. A relatively high price of the petroleum pitch-based precursor, as well as the depletion of their sources, is the main reason to incline the use of coal-tar pitch instead of petroleum pitch. Int Arch Occup Environ Health. Insoluble in water yet soluble in organic solvents, tar-pitch compounds usually boast high molecular weights, making them viscous and Jongeneelen, F. /Coal tar pitch/ 1. 5. A human carcinogen. g. satyendra; December 26, 2018; 3 Comments ; Binder grade, Carbon electrodes, Coal tar, Coal tar pitch, Distilltion, Impregnating grade, PAHs, TWA,; Coal Tar Pitch . There is moderate evidence in humans for a genotoxic mechanism underlying the effects of exposures during roofing and paving with coal-tar pitch, based on one study. CONDENSATE 65996-92-1 C14H18O4CLN5 UVCBs-organic Asphalt (naturally occurring pitch) may also be called either "mineral tar" or "mineral pitch". /Coal tar pitch/ Jan 6, 2025 · Coal tar volatiles are the vapors produced from heated coal tar or coal tar pitch, containing lower molecular weight (smaller ring number) polycyclic aromatic hydrocarbons (PAHs). NIOSH: Occupational Health Guideline for Coal Tar Pitch Volatiles. The residue from the distillation of high temperature coal tar. Natural bitumen pitch, from the tar pit above the McKittrick Oil Field, Kern County, California. : Biological exposure limit for occupational exposure to coal tar pitch volatiles at cokeovens. At onetime coal tar was the major source oforganic chemicals, most of which arenow derived from petroleum andnatural gas. [13]Coal tar is a mixture of approximately 10,000 chemicals, of which only about 50% have been identified. Its composition varies with the process and type of coal used – lignite, bituminous or anthracite. 4-1 through 4-3. The volatile component is not shown separately because it Coal tar is produced through thermal destruction of coal. 63(8):511-516, 1992. Coal tar pitch is similar in composition to coal tar creosote and is not presented separately. Coal tar pitch is composed almost entirely of polynuclear aromatic compounds and constitutes 48-65% of the usual grades of coal tar. , the creosote, coal tar creosote, and coal tar is provided in Tables . Hazard. 4 Tar and Pitch. Toxic by inhalation. 1. Tar and pitch are viscous, dark-brown to black substances obtained by the destructive distillation of coal, wood, petroleum, peat, and certain other organic materials. Pitch is a viscoelastic polymer which can be natural or manufactured, derived from petroleum, coal tar, [1] or plants. . Use and applications Binder pitch In the aluminium industry, coal tar pitch is used as a binder in the manufacture of electrodes which primarily consist Dec 18, 2024 · COAL TAR PITCH) Pitch (unspecified) Coal tar pitch volatiles (as benzene solubles) Distillates (coal tar) Heavy Anthracene Oil Pitch, coal tar, high-temp. Coal-tar pitch is carcinogenic to humans (Group 1). There is a tendency to use "tar" for more liquid substances and "pitch" for more solid (viscoelastic) substances. Coal-tar pitch, which is a by-product of the coke oven, is frequently used as a binder and impregnator in the manufacture of electrodes in the aluminium Dec 26, 2018 · Coal Tar Pitch. The residue is pitch. pitch, in the chemical-process industries, the black or dark brown residue obtained by distilling coal tar, wood tar, fats, fatty acids, or fatty oils. Chemica l name (IUPAC ): Coal Tar pitch CAS number(s): 65996-93-2 ES number: 215-609 -9 Molecular formula: NA 3. chrysene, fluoranthene, pyrene, triphenylene, naphthacene and benzanthracene); five-membered ring systems (picene, benzo[a]pyrene (B[a]P) and benzo[e]pyrene, benzofluoranthenes and perylene); six-membered ring systems (dibenzopyrenes Tar Chemical Properties. Coal tar is obtained by the distillation of bituminous coal (Ref. , which can be obtained by distillation. A black solid with an approximate softening point from 30°C to 180°C (86°F to 356°F). The chemical properties of this important material are determined by the specific compounds that comprise it; however, some properties are generally present in most tar-pitch mixtures. Coal tar pitch volatiles are compounds given off from coal tar pitch when it is heated. 1. 2). Identification of the agent. Composed primarily of a complex mixture of three or more membered condensed ring aromatic hydrocarbons. Coal tar pitch exposure leads to an increased risk of developing skin, lung, bladder, kidney and digestive-tract cancer as well of coal for the production of coke (Ref. Coal tar pitch, derived from by-product coke ovens, is the preferred material for use as a binder in the manufacture of carbon and graphite electrodes. xhqy evmzsn kgt wia pdhl xucjcy rimqom bttqfy egyneaea jjzxpfhfu