Dibromchlormethan Chemische Eigenschaften,Einsatz,Produktion Methoden
R-S?tze Betriebsanweisung:
R22:Gesundheitssch?dlich beim Verschlucken.
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-S?tze Betriebsanweisung:
S45:Bei Unfall oder Unwohlsein sofort Arzt zuziehen (wenn m?glich, dieses Etikett vorzeigen).
S36/37/39:Bei der Arbeit geeignete Schutzkleidung,Schutzhandschuhe und Schutzbrille/Gesichtsschutz tragen.
S26:Bei Berührung mit den Augen sofort gründlich mit Wasser abspülen und Arzt konsultieren.
S36/37:Bei der Arbeit geeignete Schutzhandschuhe und Schutzkleidung tragen.
Chemische Eigenschaften
clear light yellow to orange liquid
Verwenden
A volatile halogenated methane present in trace amounts in drinking water as a result of the water treatment process. It is useful as chain transfer agents in PVC polymerization.
Allgemeine Beschreibung
Clear colorless to yellow-orange liquid. Density 2.451 g / cm3. No flash point.
Air & Water Reaktionen
Insoluble in water.
Reaktivit?t anzeigen
CHLORODIBROMOMETHANE is incompatible with strong bases, strong oxidizing agents and magnesium
Health Hazard
Chlorodibromomethane is a
central nervous system (CNS) depressant at
extremely high concentrations; it is toxic to
the liver and kidneys of rodents and induces
hepatocellular tumors in mice after long-term
exposure.
In animal studies, the oral LD50 typically
ranges between 800 and 1200 mg/kg.1,2 Acute
signs of intoxication include sedation, flaccid
muscle tone, ataxia, and prostration; death is
due to CNS depression. In cases in which death
does not occur until several days after acute
exposure, hepatic and renal injury may be the
cause of death.
Brandgefahr
CHLORODIBROMOMETHANE is probably combustible.
Sicherheitsprofil
Moderately toxic by
ingestion. Questionable carcinogen with
experimental carcinogenic data. Human
mutation data reported. Compounds of this
type are generally irritating and narcotic. See
also BROMOFORM and CHLOROFORM.
When heated to decomposition it emits
toxic fumes of Cland Br-.
m?gliche Exposition
Dibromochloromethane is used
as a chemical intermediate in the manufacture of fire
extinguishing agents; aerosol propellants; refrigerants, and
pesticides. Dibromochloromethane has been detected in
drinking water in the United States. It is believed to be
formed by the haloform reaction that may occur during
Environmental Fate
Biological. Dibromochloromethane showed significant degradation with gradual adaptation in a
static-culture flask-screening test (settled domestic wastewater inoculum) conducted at 25 °C. At
concentrations of 5 and 10 mg/L, percent losses after 4 wk of incubation were 39 and 25,
respectively. At a substrate concentration of 5 mg/L, 16% was lost due to volatilization after 10 d
(Tabak et al., 1981).
Surface Water. The estimated volatilization half-life of dibromochloromethane from rivers and
streams is 45.9 h (Kaczmar et al., 1984).
Photolytic. Water containing 2,000 ng/μL of dibromochloromethane and colloidal platinum
catalyst was irradiated with UV light. After 20 h, dibromochloromethane degraded to 80 ng/μL
bromochloromethane, 22 ng/μL methyl chloride, and 1,050 ng/μL methane. A duplicate
experiment was performed but 1 g zinc was added. After about 1 h, total degradation was
achieved. Presumed transformation products include methane, bromide, and chloride ions (Wang
and Tan, 1988).
Chemical/Physical. The estimated hydrolysis half-life in water at 25 °C and pH 7 is 274 yr
(Mabey and Mill, 1978). Hydrogen gas was bubbled in an aqueous solution containing 18.8 μmol
dibromochloromethane. After 24 h, only 18% of the dibromochloromethane reacted to form
methane and minor traces of ethane. In the presence of colloidal platinum catalyst, the reaction
proceeded at a much faster rate forming the same end products (Wang et al., 1988).
Versand/Shipping
UN2810 Toxic liquids, organic, n.o.s., Hazard
Class: 6.1; Labels: 6.1-Poisonous materials, Technical
Inkompatibilit?ten
Incompatible with oxidizers (chlorates,
nitrates, peroxides, permanganates, perchlorates, chlorine,
bromine, fluorine, etc.); contact may cause fires or explo-
sions. Keep away from alkaline materials, strong bases,
strong acids, oxoacids, epoxides, and magnesium.
Waste disposal
May be destroyed by high-
temperature incinerator equipped with an HCl scrubber.
Dibromchlormethan Upstream-Materialien And Downstream Produkte
Upstream-Materialien
Downstream Produkte
