Bromchlormethan

Bezeichnung:Bromchlormethan

CAS-Nr74-97-5

Englisch Name:Bromochloromethane

CBNumberCB7402908

SummenformelCH2BrCl

Molgewicht129.38

MOL-Datei74-97-5.mol

Synonyma

Bromchlormethan

Chlorbrommethan

Methylenchlorbromid

Bromchlormethan physikalisch-chemischer Eigenschaften

Schmelzpunkt	−88 °C(lit.)
Siedepunkt	68 °C(lit.)
Dichte	1.991 g/mL at 25 °C(lit.)
Dampfdichte	4.5 (vs air)
Dampfdruck	117 mm Hg ( 20 °C)
Brechungsindex	n20/D 1.482(lit.)
Flammpunkt	11 °C
storage temp.	2-8°C
Löslichkeit	Soluble in acetone, alcohol, benzene, ether (Weast, 1986), and many other solvents, particularly chlorinated hydrocarbons.
Wichte	1.991
Wasserlöslichkeit	9 g/L (20 ºC)
BRN	1730801
Henry's Law Constant	(x 10^-3 atm?m³/mol): 1.44 at 25 °C (approximate - calculated from water solubility and vapor pressure)
Expositionsgrenzwerte	NIOSH REL: TWA 200 ppm (1,050 mg/m³), IDLH 2,000 ppm; OSHA PEL: TWA 200 ppm; ACGIH TLV: TWA 200 ppm (adopted)
Dielectric constant	7.8（Ambient）
Stabilität	Stable, but may discolour in light. Incompatible with aluminium, magnesium, zinc, calcium, strong oxidizing agents.
LogP	1.410
CAS Datenbank	74-97-5(CAS DataBase Reference)
NIST chemische Informationen	Methane, bromochloro-(74-97-5)
EPA chemische Informationen	Halon 1011 (74-97-5)

Sicherheit

Kennzeichnung gefährlicher	Xi,N,Xn,T,F
R-Sätze:	37/38-41-59-36/37/38-20-39/23/24/25-23/24/25-11-36/38
S-Sätze:	26-39-59-37/39-45-36/37-16-7
RIDADR	UN 1887 6.1/PG 3
OEB	A
OEL	TWA: 200 ppm (1050 mg/m3)
WGK Germany	2
RTECS-Nr.	PA5250000
Hazard Note	Irritant
HazardClass	6.1(b)
PackingGroup	III
HS Code	29034980
Giftige Stoffe Daten	74-97-5(Hazardous Substances Data)
Toxizität	LC₅₀ (inhalation) for mice 15,850 mg/m³/8-h, rats 28,800 ppm/15-min (quoted, RTECS, 1985). Acute oral LD₅₀ for rats 5,000 mg/kg, mice 4,300 mg/kg (quoted, RTECS, 1985).
IDLA	2,000 ppm

Gefahreninformationscode (GHS)

Bromochloromethane Chemische Eigenschaften,Einsatz,Produktion Methoden

ERSCHEINUNGSBILD
FARBLOSE BIS GELBE FLüSSIGKEIT MIT CHARAKTERISTISCHEM GERUCH.
CHEMISCHE GEFAHREN
Zersetzung beim Erhitzen unter Bildung giftiger und ätzender Rauche mit Chlorwasserstoff, Phosgen und Bromwasserstoff. Greift viele Metalle an, einschließlich Stahl, Aluminium, Magnesium und Zink, wenn nicht stabilisiert.
ARBEITSPLATZGRENZWERTE
TLV: 200 ppm (als TWA); (ACGIH 2005).
MAK: Hautresorption; Krebserzeugend Kategorie 3B; (DFG 2005).
AUFNAHMEWEGE
Aufnahme in den Körper durch Inhalation.
INHALATIONSGEFAHREN
Beim Verdampfen bei 20°C kann schnell eine gesundheitsschädliche Kontamination der Luft eintreten.
WIRKUNGEN BEI KURZZEITEXPOSITION
WIRKUNGEN BEI KURZZEITEXPOSITION:
Inhalation der Substanz kann zu Lungenödem führen (s.Anm.). Möglich sind Auswirkungen auf Zentralnervensystem und Blut mit nachfolgenden Funktionsstörungen und Bildung von Carboxyhämoglobin. Exposition kann zu Bewusstseinstrübung führen.
WIRKUNGEN NACH WIEDERHOLTER ODER LANGZEITEXPOSITION
Wiederholter oder andauernder Hautkontakt kann Dermatitis hervorrufen. Risiko der Lungenschädigung bei wiederholter oder längerer Exposition. Möglich sind Auswirkungen auf Nieren und Leber mit nachfolgenden Funktionsstörungen.
LECKAGE
Ausgelaufene Flüssigkeit in abdichtbaren Behältern sammeln. Reste mit Sand oder inertem Absorptionsmittel aufnehmen und an einen sicheren Ort bringen. NICHT in die Kanalisation spülen. An sicheren Ort bringen. Persönliche Schutzausrüstung: Atemschutzgerät, A-Filter für organische Dämpfe.
R-Sätze Betriebsanweisung:
R37/38:Reizt die Atmungsorgane und die Haut.
R41:Gefahr ernster Augenschäden.
R59:Gefährlich für die Ozonschicht.
R36/37/38:Reizt die Augen, die Atmungsorgane und die Haut.
R20:Gesundheitsschädlich beim Einatmen.
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.
S39:Schutzbrille/Gesichtsschutz tragen.
S59:Informationen zur Wiederverwendung/Wiederverwertung beim Hersteller/Lieferanten erfragen.
S37/39:Bei der Arbeit geeignete 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.
Beschreibung
Chlorobromomethane is a clear, colorless topale yellow liquid with a chloroform-like odor. Odor threshold=400 ppm. Molecular weight=129.39; Specific gravity (H2O:1)=1.93; Boiling point=68.3℃; Freezing/Melting point=2 88℃; Vapor pressure=115 mmHg at20℃. Hazard Identification (based on NFPA 704 M RatingSystem): Health 2, Flammability 0, Reactivity 0. Insolublein water.
Chemische Eigenschaften
white to light yellow crystal powder
Chemische Eigenschaften
Chlorobromomethane is a clear, colorless, to pale-yellow liquid with a chloroform-like odor
Physikalische Eigenschaften
Clear, colorless liquid with a sweet, chloroform-like odor
Verwenden
Fire fighting agent
Verwenden
Bromochloromethane is used primarily as an extinguishing agent due to its oxygen-depleting properties.
Definition
ChEBI: A one-carbon compound substituted by a chloro and a bromo group.
Allgemeine Beschreibung
A clear colorless liquid with a sweet chloroform-like odor. Denser than water (density 1.991 g / cm3) and insoluble in water. Hence sinks in water. Boiling point 68°C. Vapors may cause illness if inhaled. Nonflammable. When exposed to high temperatures may emit toxic fumes. Used as a fire extinguishing agent.
Air & Water Reaktionen
Insoluble in water.
Reaktivität anzeigen
Bromochloromethane is sensitive to light (may discolor). Incompatible with strong bases and strong oxidizing agents. Also incompatible with active metals, calcium, aluminum, magnesium, zinc and their alloys. Attacks some forms of plastics, rubber and coatings. .
Hazard
By inhalation.
Health Hazard
Toxic by ingestion. Vapors may cause dizziness or suffocation. Exposure in an enclosed area may be very harmful. Contact may irritate or burn skin and eyes. Fire may produce irritating and/or toxic gases. Runoff from fire control or dilution water may cause pollution.
Brandgefahr
Some of these materials may burn, but none ignite readily. Most vapors are heavier than air. Air/vapor mixtures may explode when ignited. Container may explode in heat of fire.
Sicherheitsprofil
Mildly toxic by ingestion and inhalation. Mutation data reported. This material has a narcotic action of moderate intensity, although of prolonged duration. Animals exposed for several weeks to 1000 pprn had blood bromide levels as high as 350 mgl100 g. Therefore, until further data are available, it should be considered at least as toxic as carbon tetrachloride and more than minimal exposure to its vapors should be avoided. Dangerous; when heated to decomposition it emits highly toxic fumes of Brand Cl-. See also BROMIDES and CHLORINATED HYDROCARBONS, ALIPHATIC.
mögliche Exposition
This compound is used in brominated flame retardants; a fire-extinguishing agent; and in organic synthesis
Erste Hilfe
If this chemical gets into the eyes, remove any contact lenses at once and irrigate immediately for at least15 min, occasionally lifting upper and lower lids. Seek medical attention immediately. If this chemical contacts the skin,remove contaminated clothing and wash immediately withsoap and water. Seek medical attention immediately. If thischemical has been inhaled, remove from exposure, begin rescue breathing (using universal precautions, includingresuscitation mask) if breathing has stopped and CPR if heartaction has stopped. Transfer promptly to a medical facility.When this chemical has been swallowed, get medical attention. Give large quantities of water and induce vomiting. Donot make an unconscious person vomit. Medical observationis recommended for 24-48 h after breathing overexposure,as pulmonary edema may be delayed. As first aid for pulmonary edema, a doctor or authorized paramedic may consideradministering a corticosteroid spray.
Carcinogenicity
The U.S. EPA classification is D (not classifiable as to human carcinogenicity). Bromochloromethane is structurally similar to dichloromethane (methylene chloride), which is classified B2 (probable human carcinogen). The classification is based on the lack of data regarding the carcinogenicity of bromochloromethane in humans or animals; however, there are data indicative of genotoxic effects and structural relationships to halogenated methanes classified as B2 (probable human carcinogens).
Source
No MCLGs or MCLs have been proposed, however, a DWEL of 0.5 mg/L was recommended (U.S. EPA, 2000).
Naturally formed by algal biological processes (Orkin et al., 1997) and is a disinfection byproduct in public water treatment systems.
Environmental Fate
Biological. When bromochloromethane (5 and 10 mg/L) was statically incubated in the dark at 25 °C with yeast extract and settled domestic wastewater inoculum for 7 d, 100% biodegradation with rapid adaptation was observed (Tabak et al., 1981).
Photolytic. The following rate constants were reported for the reaction of bromochloromethane and OH radicals as measured by both flash photolysis resonance fluorescence and discharge flow electron paramagnetic resonance techniques (x 10^-13 cm³/molecule?sec): 0.91 at 4 °C, 1.11–1.13 at 25 °C, 1.32–1.34 at 40 °C, 1.55–1.58 at 57 °C, 1.76–1.90 at 76 °C, 2.10–2.26 at 97 °C (Orkin et al., 1997).
Chemical/Physical. Although no products were identified, the estimated hydrolysis half-life in water at 25 °C and pH 7 is 44 yr (Mabey and Mill, 1978). Bromochloromethane reacts with bisulfide ion (HS-), produced by microbial reduction of sulfate, forming 1,3,5-trithiane and dithiomethane. Estimated reaction rate constants at 25 and 35 °C were 7.29 x 10^-5 and 2.42 x 10- 4/M?sec, respectively (Roberts et al., 1992).
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. Chlorobromomethane must be stored to avoid contact with chemically active metals, since violent reactionsoccur. Store in tightly closed containers in a cool, wellventilated area away from heat.
Versand/Shipping
UN1887 Bromochloromethane, Hazard Class: 6.1; Labels: 6.1-Poisonous materials.
Inkompatibilitäten
Incompatible with strong oxidizers (possible explosion), reducing agents, bases, carbonates, furyl alcohol, chemically active metals, such as calcium; base metals in the presence of moisture, powdered aluminum; zinc, magnesium. Liquid attacks some plastics, rubber, and coatings.
Waste disposal
Incinerate together with flammable solvent in furnace equipped with afterburner and alkali scrubber.

Bromochloromethane Upstream-Materialien And Downstream Produkte

Bromchlormethan Anbieter Lieferant Produzent Hersteller Vertrieb Händler.

74-97-5, Bromochloromethane Verwandte Suche:

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