o-Kresol Produkt Beschreibung

o-Cresol Struktur
95-48-7
  • CAS-Nr.95-48-7
  • Bezeichnung:o-Kresol
  • Englisch Name:o-Cresol
  • Synonyma:o-Kresol;2-Hydroxy-1-methylbenzol;2-Methylphenol;o-Hydroxytoluol
    o-toluol;o-Kresol;O-CRESOL;2-Cresol;FEMA 3480;Orthocresol;ORTHO CRESO;ortho-cresol;o-Oxytoluene;o-CRESOL pure
  • CBNumber:CB4854694
  • Summenformel:C7H8O
  • Molgewicht:108.14
  • MOL-Datei:95-48-7.mol
o-Kresol physikalisch-chemischer Eigenschaften
  • Schmelzpunkt: :30-34 °C
  • Siedepunkt: :191 °C
  • Dichte :1.048 g/mL at 25 °C
  • Dampfdichte :3.72 (vs air)
  • Dampfdruck :0.3 mm Hg ( 20 °C)
  • Brechungsindex :1.5361
  • FEMA  :3480 | O-CRESOL
  • Flammpunkt: :178 °F
  • storage temp.  :2-8°C
  • Löslichkeit :20g/l
  • Aggregatzustand :Liquid or Low Melting Solid
  • pka :10.2(at 25℃)
  • Farbe :white to brown
  • PH :4.8 (20g/l, H2O, 20℃)
  • Explosionsgrenze :1.47%, 148°F
  • Wasserlöslichkeit :20 g/L (20 ºC)
  • Merck  :14,2579
  • JECFA Number :691
  • BRN  :506917
  • Henry's Law Constant :0.34 at 5.25 °C, 0.61 at 10.00 °C, 1.57 at 20.00 °C, 2.33 at 25.00 °C (dynamic equilibrium system- GC, Feigenbrugel et al., 2004a)
  • Expositionsgrenzwerte :NIOSH REL: TWA 2.3 ppm (10 mg/m3), IDLH 250 ppm; OSHA PEL: TWA 5 ppm (22 mg/m3); ACGIH TLV: TWA for all isomers 5 ppm (adopted).
  • Stabilität: :Stable, but light and air sensitive. Combustible. Incompatible with oxidizing agents, bases.
  • InChIKey :QWVGKYWNOKOFNN-UHFFFAOYSA-N
  • CAS Datenbank :95-48-7(CAS DataBase Reference)
  • NIST chemische Informationen :Phenol, 2-methyl-(95-48-7)
  • EPA chemische Informationen :Phenol, 2-methyl-(95-48-7)
Sicherheit

o-Cresol Chemische Eigenschaften,Einsatz,Produktion Methoden

  • ERSCHEINUNGSBILD FARBLOSE KRISTALLE MIT CHARAKTERISTISCHEM GERUCH. VERFäRBT SICH DUNKEL BEI KONTAKT MIT LUFT UND LICHT.
  • CHEMISCHE GEFAHREN Reagiert heftig mit starken Oxidationsmitteln. Schwache Säure in wässriger Lösung.
  • ARBEITSPLATZGRENZWERTE TLV: 5 ppm (als TWA); Hautresorption (ACGIH 2008).
    MAK: Hautresorption (H); Krebserzeugend Kategorie 3A; BAT vorhanden; (DFG 2008).
  • AUFNAHMEWEGE Aufnahme in den Körper durch Inhalation, über die Haut und durch Verschlucken. Schwerwiegende lokale Wirkungen auf allen Aufnahmewegen.
  • INHALATIONSGEFAHREN Beim Verdampfen bei 20°C tritt langsam eine gesundheitsschädliche Kontamination der Luft ein
  • WIRKUNGEN NACH WIEDERHOLTER ODER LANGZEITEXPOSITION Wiederholter oder andauernder Hautkontakt kann Dermatitis hervorrufen. Möglich sind Auswirkungen auf das Nervensystem mit nachfolgenden Funktionsstörungen. Möglich sind Auswirkungen auf das Blut mit nachfolgender Blutarmut.
  • LECKAGE Persönliche Schutzausrüstung: Atemschutzgerät mit Filter für organische Gase und Partikel entsprechend der Arbeitsplatzkonzentration des Stoffes. Chemikalienschutzanzug. Verschüttetes Material in Behältern sammeln; falls erforderlich durch Anfeuchten Staubentwicklung verhindern. Reste sorgfältig sammeln. An sicheren Ort bringen. NICHT in die Umwelt gelangen lassen.
  • R-Sätze Betriebsanweisung: R24/25:Giftig bei Berührung mit der Haut und beim Verschlucken.
    R34:Verursacht Verätzungen.
    R39/23/24/25:Giftig: ernste Gefahr irreversiblen Schadens durch Einatmen, Berührung mit der Haut und durch Verschlucken.
    R23/24/25:Giftig beim Einatmen, Verschlucken und Berührung mit der Haut.
  • S-Sätze Betriebsanweisung: S36/37/39:Bei der Arbeit geeignete Schutzkleidung,Schutzhandschuhe und Schutzbrille/Gesichtsschutz tragen.
    S45:Bei Unfall oder Unwohlsein sofort Arzt zuziehen (wenn möglich, dieses Etikett vorzeigen).
    S36/37:Bei der Arbeit geeignete Schutzhandschuhe und Schutzkleidung tragen.
  • Aussehen Eigenschaften C7H8O; 2-Methylphenol, 2-Hydroxytoluol, 2-Methyloxybenzol. Farbloses Pulver mit phenolartigem Geruch. Hygroskopisch und licht- und luftempfindlich. Brennt mit starker Rußentwicklung.
  • Gefahren für Mensch und Umwelt Giftig bei Berührung mit der Haut und beim Verschlucken. Verursacht Verätzungen. Leichte Hautresorption möglich. Wirkt zentral lähmend, daher kaum Schmerzwarnung. Leber- und Nierenschäden möglich.
    Heftige Reaktionen mit Oxidationsmitteln möglich.
    LD50 (oral, Ratte): 121 mg/kg.
  • Schutzmaßnahmen und Verhaltensregeln Schutzhandschuhe als kurzzeitiger Staubschutz.
  • Verhalten im Gefahrfall Mit flüssigkeitsbindendem Material z. B. Rench Rapid oder trocken aufnehmen. Der Entsorgung zuführen. Nachreinigen.
    Kohlendioxid, Wasser, Schaum, Pulver.
    Brennbar. Mit Luft Bildung explosionsfähiger Gemische möglich.
  • Erste Hilfe Nach Hautkontakt: Mit reichlich Wasser abwaschen. Abtupfen mit Polyethylenglycol 400.
    Nach Augenkontakt: Mit reichlich Wasser bei geöffnetem Lidspalt mindestens 10 Minuten ausspülen. Augenarzt hinzuziehen.
    Nach Einatmen: Frischluft.
    Nach Verschlucken: Viel Wasser trinken lassen. Erbrechen auslösen. Sofort Arzt hinzuziehen.
    Nach Kleidungskontakt: Kontaminierte Kleidung sofort entfernen.
    Ersthelfer: siehe gesonderten Anschlag

  • Sachgerechte Entsorgung Gelöst als halogenfreie, organische Lösemittelabfälle oder fest als Laborchemikalienabfälle.
  • Chemische Eigenschaften colourless to light yellow liquid
  • Chemische Eigenschaften Cresol is a mixture of the three isomeric cresols, o-, m-, and p-cresol. Cresols are slightly soluble in water. m-Isomer: Colorless or yellow liquid with characteristic odor.
  • Chemische Eigenschaften o-Cresol has a musty, phenolic aftertaste.
  • Physikalische Eigenschaften Colorless solid or liquid with a phenolic odor; darkens on exposure to air. An odor threshold concentration of 0.28 ppbv was reported by Nagata and Takeuchi (1990).
  • Occurrence Reported in Acacial farnesiana, ylang-ylang oil (probably as p-cresyl acetate), jasmine absolute, orange oil from leaves, the essence from flowers of Lilium candidum, anise seed oil, the essence of Artemisia santolinoflia, and some sea algae. Also reported found in asparagus, peppermint oil, cheddar cheese, provolone cheese, butter, milk, lean fish, boiled egg, smoked pork, rum, Scotch whiskey, red wine, white wine, coffee and mango.Reported found in cinnamon, coffee, Oriental tobacco, rum, sherry, tea, tomato and whiskey.
  • Verwenden Disinfectant; phenolic resins; tricresyl phosphate; ore flotation; textile scouring agent; organic intermediate; manufacturing salicylaldehyde, coumarin, and herbicides; surfactant; synthetic food flavors (para isomer only); food antioxidant; dye, perfume, plastics, and resins manufacturing.
  • Definition ChEBI: A cresol that is phenol substituted by a methyl group at position 2. It is a minor urinary metabolite of toluene.
  • Aroma threshold values Aroma characteristics at 1.0%: phenolic, medicinal, sweet spicy, smoky with a methyl salicylate nuance.
  • Taste threshold values Taste characteristics at 2.0 ppm: sweet medicinal, phenolic and tarlike.
  • Allgemeine Beschreibung Colorless or yellow to brown-yellow or pinkish colored liquid with a phenol-like odor. Toxic by ingestion and/or skin absorption. May have a flash point between 100 and 199°F. Causes burns to skin, eyes and mucous membranes. Insoluble in water.
  • Air & Water Reaktionen Sensitive to light and air. Insoluble in water.
  • Reaktivität anzeigen o-Cresol is incompatible with oxidizing agents and bases. Mixing o-Cresol with chlorosulfonic acid, nitric acid and oleum in a closed contained caused the temperature and pressure to increase.
  • Hazard Questionable carcinogen.
  • Health Hazard The chemical is rated as a very toxic compound with a probable oral lethal dose in humans of 50-500 mg/kg, or between 1 teaspoon and 1 ounce for a 70 kg (150 lb.) person. It is a strong dermal irritant and frequently causes dermatitis. Serious or fatal poisoning may result if large areas of skin are wet with cresol, o- and the substance is not removed immediately. Ingestion of even a small amount may cause paralysis and coma. It is corrosive to body tissues, with toxicity similar to phenol.
  • Brandgefahr Fire may produce irritating or poisonous gases. Runoff from fire control water may give off poisonous gases. o-Cresol may burn but does not ignite readily. Container may explode in heat of fire. Slight explosion and fire hazard in the form of vapor when exposed to heat or flame. When heated to decomposition, o-Cresol emits highly toxic fumes. Reacts violently with nitric acid, oleum, and chlorosulfonic acid. Hazardous polymerization may not occur.
  • Sicherheitsprofil Poison by ingestion, inhalation, subcutaneous, intravenous, and intraperitoneal routes. Moderately toxic by skin contact. A severe eye and skin irritant. Human mutation data reported. Questionable carcinogen with experimental neoplastigenic data. Flammable when exposed to heat, flame, or oxidants. To fight fire, water may be used to blanket fire; foam, fog, mist, dry chemical. See also other cresol entries and PHENOL.
  • mögliche Exposition Cresol is used as a disinfectant and fumigant; as an ore flotation agent, and as an intermediate in the manufacture of chemicals, dyes, plastics, and antioxidants. A mixture of isomers is generally used; the concentrations of the components are determined by the source of the cresol.
  • Source Detected in distilled water-soluble fractions of 87 octane gasoline (6.61 mg/L), 94 octane gasoline (0.57 mg/L), Gasohol (1.17 mg/L), No. 2 fuel oil (2.64 mg/L), jet fuel A (0.72 mg/L), diesel fuel (1.36 mg/L), and military jet fuel JP-4 (1.51 mg/L) (Potter, 1996). o-Cresol was also detected in 82% of 65 gasoline (regular and premium) samples (62 from Switzerland, 3 from Boston, MA). At 25 °C, concentrations were from 1.1–99 mg/L in gasoline and 70–6,600 μg/L in water-soluble fractions. Average concentrations were 18 mg/L in gasoline and 1.2 mg/L in watersoluble fractions (Schmidt et al., 2002).
    A high-temperature coal tar contained 2-methylphenol at an average concentration of 0.25 wt % (McNeil, 1983).
    Occurs naturally in white sandlewood, sour cherries, peppermint leaves (1–10 ppb), tarragon, asparagus shoots, tea leaves, coffee beans, Japanese privet, tomatoes, licorice roots, and African palm oil (Duke, 1992).
    Schauer et al. (2001) measured organic compound emission rates for volatile organic compounds, gas-phase semi-volatile organic compounds, and particle phase organic compounds from the residential (fireplace) combustion of pine, oak, and eucalyptus. The gas-phase emission rates of 2-methylphenol were 89.6 mg/kg of pine burned, 47.7 mg/kg of oak burned, and 37.8 mg/kg of eucalyptus burned. The particle-phase emission rates were 0.018 mg/kg of oak burned and 0.006 mg/kg of eucalyptus burned.
  • Environmental Fate Biological. Bacterial degradation of 2-methylphenol may introduce a hydroxyl group producing 3-methylcatechol (Chapman, 1972). In phenol-acclimated activated sludge, metabolites identified include 3-methylcatechol, 4-methylresorcinol, methylhydroquinone, α-ketobutyric acid, dihydroxybenzaldehyde, and trihydroxytoluene (Masunaga et al., 1986).
    Chloroperoxidase, a fungal enzyme isolated from Caldariomyces fumago, reacted with 2- methylphenol forming 2-methyl-4-chlorophenol (38% yield) and 2-methyl-6-chlorophenol (Wannstedt et al., 1990).
    Heukelekian and Rand (1955) reported a 5-d BOD value of 1.70 g/g which is 67.5% of the ThOD value of 2.72 g/g. In activated sludge inoculum, 95.0% COD removal was achieved. The average rate of biodegradation was 54.0 mg COD/g?h (Pitter, 1976).
    Soil. In laboratory microcosm experiments kept under aerobic conditions, half-lives of 5.1 and 1.6 d were reported for 2-methylphenol in an acidic clay soil (<1% organic matter) and slightly basic sandy loam soil (3.25% organic matter) (Loehr and Matthews, 1992).
    Surface Water. In river water, the half-life of 2-methylphenol was 2 and 4 d at 20 and 4 °C, respectively (Ludzack and Ettinger, 1960).
    Groundwater. Nielsen et al. (1996) studied the degradation of 2-methylphenol in a shallow, glaciofluvial, unconfined sandy aquifer in Jutland, Denmark. As part of the in situ microcosm study, a cylinder that was open at the bottom and screened at the top was installed through a cased borehole approximately 5 m below grade. Five liters of water was aerated with atmospheric air to ensure aerobic conditions were maintained. Groundwater was analyzed weekly for approximately 3 months to determine 2-methylphenol concentrations with time. The experimentally determined first-order biodegradation rate constant and corresponding half-life were 0.2/d and 3.5 d, respectively. Groundwater contaminated with phenol and other phenols degraded in a methanogenic aquifer to methane and carbon dioxide. These results could not be duplicated in the laboratory utilizing an anaerobic digester (Godsy et al., 1983).
    Photolytic. Sunlight irradiation of 2-methylphenol and nitrogen oxides in air yielded the following gas-phase products: acetaldehyde, formaldehyde, pyruvic acid, peroxyacetyl nitrate, nitrocresols, and trace levels of nitric acid and methyl nitrate. Particulate phase products were also identified and these include 2-hydroxy-3-nitrotoluene, 2-hydroxy-5-nitrotoluene, 2-hydroxy-3,5- dinitrotoluene, and tentatively identified nitrocresol isomers (Grosjean, 1984). Absorbs UV light at a maximum wavelength of 270 nm (Dohnal and Fenclová, 1995).
    Chemical/Physical. Ozonation of an aqueous solution containing 2-methylphenol (200 to 600 mg/L) yielded formic, acetic, propionic, glyoxylic, oxalic, and salicylic acids (Wang, 1990). In a different experiment, however, an aqueous solution containing 2-methylphenol (1 mM) reacted with ozone (11.7 mg/min) forming 2-methylmuconic acid and hydrogen peroxide as end products. The proposed pathway of degradation involved electrophilic aromatic substitution by the first ozone molecule followed by a 1,3-dipolar addition of the second ozone molecule to the cleaved ring (Beltran et al., 1990).
  • Versand/Shipping UN2076 Cresols, liquid, Hazard class: 6.1; Labels: 6.1-Poisonous materials, 8-Corrosive material. UN3455 Cresols, solid, Hazard class: 6.1; Labels: 6.1- Poisonous materials, 8-Corrosive material.
  • läuterung methode It can be freed from m-and p-isomers by repeated fractional distillation, It crystallises from *benzene by addition of pet ether. It has been fractionallly crystallised by partial freezing of its melt. The 3,5-dinitrobenzoate (prepared with 3,5-dinitrobenzoyl chloride in dry pyridine, and recrystallised from EtOH or aqueous Me2CO) has m 138o. [Beilstein 6 IV 1940.]
  • Inkompatibilitäten Vapors may form explosive mixture with air. Incompatible with strong acids; oxidizers, alkalies, aliphatic amines; amides, chlorosulfonic acid; oleum. Decomposes on heating, producing strong acids and bases, causing fire and explosion hazard. Liquid attacks some plastics and rubber. Attacks many metals.
  • Waste disposal Wastewaters may be subjected to biological treatment. Concentrations may be further reduced by ozone treatment. High concentration wastes may be destroyed in special waste incinerators.
o-Cresol Upstream-Materialien And Downstream Produkte
Upstream-Materialien
Downstream Produkte
o-Kresol Anbieter Lieferant Produzent Hersteller Vertrieb Händler.
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95-48-7, o-Cresol Verwandte Suche:
  • cresol,ortho-isomer
  • o-Cresylicalcohd
  • o-Kresol
  • o-Methylphenylol
  • o-Oxytoluene
  • Orthocresol
  • ortho-cresol
  • ortho-cresolsaka1-methylphenol
  • o-toluol
  • O-CRESOL, STANDARD FOR GC
  • O-CRESOL GC STANDARD
  • O-CresolForSynthesis
  • o-Cresol, 98+%
  • o-Tolyl alcohol
  • o-cresol,2-hydroxytoluene,2-methylphenol
  • 2-methylphenol solution
  • O-CRESOL,HIGHPURITY
  • CRESOL,TECHNICAL
  • ORTHO-OXYTOLUENE
  • ORTHO-METHYLPHENOL
  • KRESOL-ORTHO, E.P. MIN. 30 P., WASSER MAX. 0,2 P.
  • O-CRESOL / 2-METHYLPHENOL
  • O-CRESOL, NATURAL
  • o-CRESOL pure
  • 2-Methylphenol, o-Cresol solution
  • 2-Methylphenol, o-Cresol
  • 2-Hydroxy-1-methylbenzene
  • o-Cresol, AcroSeal, 99%
  • o-Cresol, synthesis grade
  • 2-Methylphenol 5g [95-48-7]
  • o-Cresol 5g [95-48-7]
  • o-Cresol, 99%, AcroSeal
  • o-Cresol, 99% 1KG
  • o-Cresol, 99% 500GR
  • O-CRESOL FOR SYNTHESIS 1 L
  • O-CRESOL FOR SYNTHESIS 100 ML
  • O-CRESOL FOR SYNTHESIS 500 ML
  • O-CRESOL FOR SYNTHESIS 2,5 L
  • O-CRESOL FOR SYNTHESIS 25 KG
  • O-CRESOL
  • O-CRESYLIC ACID
  • O-METHYLPHENOL
  • O-HYDROXYTOLUENE
  • FEMA 3480
  • 2-HYDROXYTOLUENE
  • 2-METHYLPHENOL
  • 1-HYDROXY-2-METHYLBENZENE
  • 1-Methyl-2-hydroxybenzene
  • 2-Cresol
  • 2-methyl-pheno
  • Phenol,2-methyl-
  • o-Cresylic alcohol
  • ORTHO CRESO
  • Natural O-Cresol
  • O-CRESOL 99+%
  • 2-METHYLPHENOL, 1000MG, NEAT
  • O-CRESOL EXTRA PURE
  • O-CRESOL, REAGENTPLUS, >=99%