Pech, Kohlenteer, Hochtemperatur

Gefahreninformationscode (GHS)

• Bildanzeige (GHS)

  

• Alarmwort

  Achtung

• Gefahrenhinweise

  H340：Kann genetische Defekte verursachen.

  H350：Kann Krebs verursachen.

Coal tar Chemische Eigenschaften,Einsatz,Produktion Methoden

• ERSCHEINUNGSBILD

  SCHWARZE BIS BRAUNE PASTE.

• CHEMISCHE GEFAHREN

  Zersetzung beim Erhitzen über 400°C unter Bildung giftiger Rauche. Reagiert mit starken Oxidationsmitteln.

• ARBEITSPLATZGRENZWERTE

  TLV: (als benzollösliches Aerosol für flüchtiges Kohlenteerpech) 0.2 mg/m?(als TWA) Krebskategorie A1(bestätigte krebserzeugende Wirkung beim Menschen); (ACGIH 2005).
  

• AUFNAHMEWEGE

  Aufnahme in den Körper durch Inhalation und über die Haut und durch Verschlucken.

• INHALATIONSGEFAHREN

  Verdampfung bei 20°C vernachlässigbar; eine gesundheitsschädliche Partikelkonzentration in der Luft kann jedoch beim Dispergieren und Erhitzen schnell erreicht werden.

• WIRKUNGEN BEI KURZZEITEXPOSITION

  WIRKUNGEN BEI KURZZEITEXPOSITION:
  Die Substanz reizt die Augen, die Haut und die Atemwege.

• WIRKUNGEN NACH WIEDERHOLTER ODER LANGZEITEXPOSITION

  Wiederholter oder andauernder Hautkontakt kann Dermatitis und Hyperpigmentation der Haut hervorrufen. Krebserzeugend für den Menschen.

• LECKAGE

  Verschüttetes Material in abdichtbaren Behältern sammeln. Reste sorgfältig sammeln. An sicheren Ort bringen. NICHT in die Umwelt gelangen lassen. Persönliche Schutzausrüstung: Atemschutzgerät, A/P2-Filter für organische Dämpfe und schädlichen Staub.

• Beschreibung

  The term “coal tar products,” as used byNIOSH, includes coal tar and two of the fractionation products of coal tar, creosote and coal tar pitch, derived fromthe carbonization of bituminous coal. Coal tar, coal tarpitch, and creosote derived from bituminous coal often contain identifiable components which by themselves are carcinogenic, such as benzo(a)pyrene, benzanthracene, chrysene,and phenanthrene. Other chemicals from coal tar products,such as anthracene, carbazole, fluoranthene, and pyrene,may also cause cancer, but these causal relationships havenot been adequately documented. Also, the research chemical methylcholanthrene [CAS: 56-49-5], a powerful carcinogen, fits this category. Boiling point =＞260℃; Meltingpoint =250-180℃; Flash point =207℃ (coal tar pitch);74℃ (creosote oil); Autoignition temperature =＞510℃.Insoluble in water.

• Chemische Eigenschaften

  The term “coal tar products,” as used by NIOSH, includes coal tar and two of the fractionation products of coal tar, creosote and coal tar pitch, derived from the carbonization of bituminous coal. Coal tar, coal tar pitch, and creosote (coal tar creosote 8001-58-9) derived from bituminous coal often contain identifiable components which by themselves are carcinogenic, such as benzo(a) pyrene, benzanthracene, chrysene, and phenanthrene. Other chemicals from coal tar products, such as anthracene, carbazole, fluoranthene, and pyrene may also cause cancer,but these causal relationships have not been adequately documented. Also, the research chemical methylcholanthrene (CAS: 56-49-5), a powerful carcinogen, fits this category. Coal tar pitch is a black viscous liquid. Aromatic solvent odor. Boiling point =>260°C; specific gravity (H2O:1) = 1.07-108; freezing/melting point = 250-°180C;flash point = 207°C (coal tar pitch); 74C (creosote oil);autoignition temperature =>510°C. Insoluble in water.Coal tar creosote (8001-58-9, crosote) is an black oily,tar-like substance. Pungent odor

• Chemische Eigenschaften

  A nearly black, viscous liquid. On exposure to air, the viscosity gradually increases. It burns in air with a luminous, sooty flame. It has a weight per mL of about 1.15 g.

• Verwenden

  Coal tar pitch is used as a base for paints and coatings, as a binder for carbon electrodes, for impregnating fiber pipe, in briquetting coal, in foundry core compounds, as a plasticizer for elastomers and polymers, as extenders, saturants, impregnants, and sealants, and in paving and roofing. Occupations with potential exposures to coal tar, coal tar pitch.

• Verwenden

  Used in treatment of psoriasis.

• Verwenden

  Occur as emissions from coke ovens, from coking of coal tar pitch, and from Soderberg aluminum reduction electrolytic cells; used for base coatings and paints; for roofing and paving; and as a binder for carbon electrodes

• Definition

  Tar produced by heating coal in the absence of oxygen. It is a mixture of many organic compounds (e.g. benzene, toluene, and naphthalene) and also contains free carbon.

• Definition

  coal tar: A tar obtained from the destructivedistillation of coal. Formerly,coal tar was obtained as a byproductin manufacturing coal gas.Now it is produced in making cokefor steel making. The crude tar containsa large number of organiccompounds, such as benzene, naphthalene,methylbenzene, phenols,etc., which can be obtained by distillation.The residue is pitch. At onetime coal tar was the major source oforganic chemicals, most of which arenow derived from petroleum andnatural gas.

• Hazard

  A human carcinogen. Toxic by inhalation. Combustible.

• Health Hazard

  Epidemiological evidence suggests that workers intimately exposed to the products of combustion or distillation of bituminous coal are at increased risk of cancer at many sites, including lungs, kidney, and skin.
  The chemical composition and particle size distribution of coal tar pitch volatiles (CTPV) from different sources are significant variables in determining toxicity.

• Sicherheitsprofil

  Confirmed carcinogen with experimental carcinogenic and neoplastigenic data by skin contact. When heated to decomposition it emits acrid smoke and fumes.

• mögliche Exposition

  The coke-oven plant is the principal source of coal tar. The hot gases and vapors produced during the conversion of coal to coke are collected by means of a scrubber, which condenses the effluent into ammonia, water, crude tar, and other by-products. Crude tar is separated from the remainder of the condensate for refining and may undergo further processing. Employees may be exposed to pitch and creosote in metal and foundry operations; when installing electrical equipment; in construction, railway, utility; and briquette manufacturing.

• Veterinary Drugs and Treatments

  Use of coal tar containing shampoos in veterinary medicine is somewhat controversial, particularly since all veterinary-labeled products have been withdrawn from the market. However, coal tar shampoos have been used in dogs for treating greasy dermatoses (seborrhea oleosa) for many years.
  Coal tar possesses keratoplastic, keratolytic, vasoconstrictive, antipruritic and degreasing actions. Coal tar’s mechanism of keratoplastic (keratoregulating) action is probably secondary to decreasing mitosis and DNA synthesis of basal epidermal cells.

• Erste Hilfe

  If this chemical gets into the eyes, remove anycontact lenses at once and irrigate immediately for at least15 min, occasionally lifting upper and lower lids. Seek medical attention immediately. If this chemical contacts theskin, remove contaminated clothing and wash immediatelywith soap and water. Seek medical attention immediately. Ifthis chemical has been inhaled, remove from exposure,begin rescue breathing (using universal precautions, including resuscitation mask) if breathing has stopped and CPR ifheart action has stopped. Transfer promptly to a medicalfacility. When this chemical has been swallowed, get medical attention. Give large quantities of water and inducevomiting. Do not make an unconscious person vomit.

• Carcinogenicity

  The history of coal tar cancers begins with the observations of scrotal cancer in London chimney sweeps by Percivall Pott in 1777. Since that time, a large body of evidence has accumulated demonstrating that workers involved in carbonizing bituminous coal, those handling certain by-products, or those exposed by inhalation of coal tar pitch volatiles are at excess risk of scrotal and other forms of skin, respiratory, and other types of cancer. Coal tar contains many substances that can cause cancer and is a human carcinogen. The toxicity of coal tar may vary with its origin.

• Lager

  Color Code—Blue: Health Hazard/Poison: Storein a secure poison location. Prior to working with thischemical you should be trained on its proper handling andstorage. Before entering confined space where this chemicalmay be present, check to make sure that an explosive concentration does not exist. Store in tightly closed containersin a cool, well-ventilated area away from strong oxidizers(such as chlorine, bromine, and fluorine). Sources of ignition, such as smoking and open flames, are prohibitedwhere coal tar creosote is used, handled, or stored in a manner that could create a potential fire or explosion hazard.Metal containers involving the transfer of 5 gallons or moreof coal tar creosote should be grounded and bonded. Drumsmust be equipped with self-closing valves, pressure vacuumbungs, and flame arresters. A regulated, marked area shouldbe established where this chemical is handled, used, orstored in compliance with OSHA Standard 1910.1045.Entry into areas containing coal tar creosote is to be controlled by permit only.

• Versand/Shipping

  UN1136 Coal tar distillates, flammable, Hazard Class: 3; Labels: 3-Flammable liquid

• Inkompatibilitäten

  Incompatible with strong oxidizers (chlorates, nitrates, peroxides, permanganates, perchlorates, chlorine, bromine, fluorine, etc.); contact may cause fires or explosions. Keep away from alkaline materials, strong bases, strong acids, oxoacids, epoxides. Phenols, such as creosote react as weak organic acids. Phenols and cresols are much weaker as acids than common carboxylic acids (phenol has pKa = 9.88). These materials are incompatible with strong reducing agents such as hydrides, nitrides, alkali metals, and sulfides. Flammable hydrogen gas is often generated, and the heat of the reaction may ignite the gas. Heat is also generated by the acid-base reaction between phenols and bases. Such heating may initiate polymerization of the organic compound. Phenols are sulfonated very readily (e.g., by concentrated sulfuric acid at room temperature). The reactions generate heat. Phenols are also nitrated very rapidly, even by dilute nitric acid

• Waste disposal

  Dissolve or mix the material with a combustible solvent and burn in a chemical incinerator equipped with an afterburner and scrubber. All federal, state, and local environmental regulations must be observed.

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