2,4-Xylenol

Bezeichnung:2,4-Xylenol

CAS-Nr105-67-9

Englisch Name:2,4-Dimethylphenol

CBNumberCB6125178

SummenformelC8H10O

Molgewicht122.16

MOL-Datei105-67-9.mol

Synonyma

2,4-Xylenol

2,4-Dimethylphenol

m-Xylenol

2,4-Xylenol physikalisch-chemischer Eigenschaften

Schmelzpunkt	22-23 °C(lit.)
Siedepunkt	211-212 °C(lit.)
Dichte	1.011 g/mL at 25 °C(lit.)
Dampfdruck	0.1 mm Hg ( 25 °C)
Brechungsindex	n20/D 1.538(lit.)
Flammpunkt	205 °F
storage temp.	Store below +30°C.
Löslichkeit	5.0g/l
Aggregatzustand	Liquid
pka	pK1:10.58 (25°C)
Farbe	Clear colorless to yellow
Geruch (Odor)	at 100.00 %. weak smoky roasted dark
Geruchsart	smoky
Explosionsgrenze	1.4%(V)
Wasserlöslichkeit	0.5 g/100 mL (25 ºC)
Merck	14,10082
BRN	636244
Henry's Law Constant	42.8(x 10^-6 atm?m³/mol) at 75.9 °C, 74.0 at 88.7 °C, 113.0 at 98.5 °C (VLE circulation still-UV spectrophotometry, Dohnal and Fenclová, 1995)
InChIKey	KUFFULVDNCHOFZ-UHFFFAOYSA-N
LogP	2.61
CAS Datenbank	105-67-9(CAS DataBase Reference)
NIST chemische Informationen	Phenol, 2,4-dimethyl-(105-67-9)
EPA chemische Informationen	2,4-Dimethylphenol (105-67-9)

Sicherheit

Kennzeichnung gefährlicher	T,N,F
R-Sätze:	24/25-34-51/53-39/23/24/25-23/24/25-11
S-Sätze:	26-36/37/39-45-61-36/37-16-7
RIDADR	UN 2261 6.1/PG 2
WGK Germany	3
RTECS-Nr.	ZE5600000
Selbstentzündungstemperatur	480 °C
TSCA	Yes
HazardClass	6.1
PackingGroup	II
HS Code	29071400
Giftige Stoffe Daten	105-67-9(Hazardous Substances Data)
Toxizität	Acute oral LD50 for mice 809 mg/kg, rats 3,200 mg/kg (quoted, RTECS, 1985).

Gefahreninformationscode (GHS)

2,4-Dimethylphenol Chemische Eigenschaften,Einsatz,Produktion Methoden

ERSCHEINUNGSBILD
GELBE BIS BRAUNE FLüSSIGKEITODER FARBLOSE KRISTALLE.
CHEMISCHE GEFAHREN
Zersetzung beim Verbrennen unter Bildung giftiger Gaseund reizender Rauche. Reagiert mit Säureanhydriden, Säurechloriden, Basenund Oxidationsmitteln.
ARBEITSPLATZGRENZWERTE
TLV nicht festgelegt (ACGIH 2005).
MAK nicht festgelegt (DFG 2005).
AUFNAHMEWEGE
Aufnahme in den Körper durch Inhalation, durch Verschlucken und über die Haut.
INHALATIONSGEFAHREN
Nur ungenügende Angaben vorhanden über die Geschwindigkeit, mit der eine gesundheitsschädliche Konzentration in der Luft beim Verdampfen bei 20°C erreicht wird.
WIRKUNGEN BEI KURZZEITEXPOSITION
WIRKUNGEN BEI KURZZEITEXPOSITION:
Die Substanz verätzt die Haut, die Atemwege und die Augen. ätzend beim Verschlucken. Inhalation eines Aerosols dieser Substanz kann zu Lungenödem führen (s.Anm.).
WIRKUNGEN NACH WIEDERHOLTER ODER LANGZEITEXPOSITION
Wiederholter oder andauernder Kontakt kann zu Hautsensibilisierung führen.
LECKAGE
Verschüttetes Material in Behältern sammeln; falls erforderlich durch Anfeuchten Staubentwicklung verhindern. Reste sorgfältig sammeln. An sicheren Ort bringen.In flüssigem Zustand ausgelaufene Flüssigkeit in abgedeckten Kunststoffbehältern sammeln. NICHT in die Umwelt gelangen lassen. Chemikalienschutzanzug mit umgebungsluftunabhängigem Atemschutzgerät.
R-Sätze Betriebsanweisung:
R24/25:Giftig bei Berührung mit der Haut und beim Verschlucken.
R34:Verursacht Verätzungen.
R51/53:Giftig für Wasserorganismen, kann in Gewässern längerfristig schädliche Wirkungen haben.
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.
R11:Leichtentzündlich.
S-Sätze Betriebsanweisung:
S26:Bei Berührung mit den Augen sofort gründlich mit Wasser abspülen und Arzt konsultieren.
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).
S61:Freisetzung in die Umwelt vermeiden. Besondere Anweisungen einholen/Sicherheitsdatenblatt zu Rate ziehen.
S36/37:Bei der Arbeit geeignete Schutzhandschuhe und Schutzkleidung tragen.
S16:Von Zündquellen fernhalten - Nicht rauchen.
S7:Behälter dicht geschlossen halten.
Beschreibung
2,4-DMP is a combustible, colorless, crystalline solid. The 2,4-isomer is 1 of 5 isomers of this formula.Molecular weight= 122.18; Boiling point 212℃; Freezing/Melting point = 2728℃; Flash point = 110℃. HazardIdentification (based on NFPA-704 M Rating System):Health 1, Flammability 2, Reactivity 0. Soluble in water.
Chemische Eigenschaften
2,4-Dimethylphenol is a clear colorless to yellow liquid or needle crystals. miscible with alcohol and ether, slightly soluble in water.It has a moderate mammalian oral toxicity and is a recognised irritant.
Physikalische Eigenschaften
Colorless solid, slowly turning brown on exposure to air.
Verwenden
2,4-dimethylphenol is a fungicide and disinfectant with a variety of agricultural uses. It is also used in making wetting agent; dyestuffs; phenolic antioxidants; pharmaceuticals; rubber chemicals; lubricant ; gasoline additive and plasticizers.
Verwenden
It is used as a perfuming agent in cosmetic industry. Also used in the production of high-viscosity phosphate esters, as a feedstock for hindered phenol antioxidant and specialty modified phenolic resin manufacture.
synthetische
synthesis of 2,4-dimethylphenol: 2,4-Dimethylphenol is obtained by sulfonation, salting out, alkali melting and acidification of m-xylene.
Definition
ChEBI: 2,4-xylenol is a member of the class of phenols that phenol substituted by methyl groups at positions 2 and 4. It has a role as a disinfectant and a volatile oil component. It is a member of phenols and an aromatic fungicide. It derives from a hydride of a m-xylene.
Allgemeine Beschreibung
2,4-dimethylphenol appears as colorless crystals or clear, dark amber liquid.
Air & Water Reaktionen
Insoluble in water.
Reaktivität anzeigen
2,4-Dimethylphenol is a very weak acid (pKa = 10.6) . Incompatible with acid chlorides, acid anhydrides, bases and oxidizing agents. Corrodes steel, brass, copper and copper alloys .
Health Hazard
2,4-Dimethylphenol is expected to be an irritant of the eyes, mucous membranes, and skin, by analogy to other phenols.
The oral LD50 for rats was 3.2 g/kg; the dermal LD50 in mice was 1.04 g/kg.
Brandgefahr
2,4-Dimethylphenol is probably combustible.
Sicherheitsprofil
Poison by intravenous and intraperitoneal routes. Moderately toxic by ingestion and skin contact. Questionable carcinogen with experimental carcinogenic data. When heated to decomposition it emits acrid smoke and irritating fumes. See also other xylenol entries.
mögliche Exposition
AgriculturalChemical; Tumorigen, Drug. 2,4-DMP finds use commercially as an important chemical feedstock or constituent forthe manufacture of a wide range of commercial productsfor industry and agriculture. 2,4-Dimethylphenol is used inthe manufacture of phenolic antioxidants, disinfectants, solvents, pharmaceuticals, insecticides, fungicides, plasticizers,rubber chemicals, polyphenylene oxide wetting agents, anddyestuffs; and is an additive or constituent of lubricants,gasolines, and cresylic acid. 2,4-Dimethylphenol (2,4-DMP)is a naturally occurring substituted phenol derived from thecresol fraction of petroleum or coal tars by fractional distillation and extraction with aqueous alkaline solutions. It isthe cresylic acid or tar acid fraction of coal tar. Workersinvolved in the fractionation and distillation of petroleum orcoal, and coal tar products comprise one group at risk.Workers who are intermittently exposed to certain commercial degreasing agents containing cresol may also be at risk.Cigarette and marijuana smoking groups and those exposedto cigarette smoke inhale microgram quantities of 2,4-demthylphenol.
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. If convulsions are not present, give a glass ortwo of water or milk to dilute the substance. Assure that theperson’s airway is unobstructed and contact a hospital orpoison center immediately for advice on whether or not toinduce vomiting
Carcinogenicity
2,4-Dimethylphenol was tested for mutagenicity in the Salmonella microsome preincubation assay using the standard protocol of the National Toxicology Program and five strains of Salmonella; results were negative.
The ACGIH has not established a threshold limit value (TLV) for 2,4-dimethylphenol.
Source
Thomas and Delfino (1991) equilibrated contaminant-free groundwater collected from Gainesville, FL with individual fractions of three individual petroleum products at 24–25 °C for 24 h. The aqueous phase was analyzed for organic compounds via U.S. EPA approved test method 625. Average 2,4-dimethylphenol concentrations reported in water-soluble fractions of unleaded gasoline, kerosene, and diesel fuel were 50, 99, and 108 μg/L, respectively. 2,4-Dichlorophenol may also enter groundwater by leaching from coal tar, asphalt runoff, plastics, and pesticides (quoted, Verschueren, 1983).
Environmental Fate
Biological. When 2,4-dimethylphenol was statically incubated in the dark at 25 °C with yeast extract and settled domestic wastewater inoculum, significant biodegradation with rapid adaptation was observed. At concentrations of 5 and 10 mg/L, 100 and 99% biodegradation, respectively, were observed after 7 d (Tabak et al., 1981).
Photolytic. 2,4-Dimethylphenol absorbs UV light at a maximum wavelength of 277 nm (Dohnal and Fenclová, 1995).
Chemical/Physical. Wet oxidation of 2,4-dimethylphenol at 320 °C yielded formic and acetic acids (Randall and Knopp, 1980). 2,4-Dimethylphenol will not hydrolyze because there is no hydrolyzable functional group (Kollig, 1993).
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. Store in tightly closed containers in a cool, wellventilated area away from oxidizers and sources of ignition
Versand/Shipping
This compound requires a shipping label of“POISONOUS/TOXIC MATERIALS” for xylenols. It fallsin Hazard Class 6.1 and Packing Group II.

2,4-Dimethylphenol Upstream-Materialien And Downstream Produkte

2,4-Xylenol Anbieter Lieferant Produzent Hersteller Vertrieb Händler.

105-67-9, 2,4-Dimethylphenol Verwandte Suche:

Send Inquriy