:Bromochloromethane

{{chembox

| Watchedfields = changed

| verifiedrevid = 403362944

| ImageFile = Bromochloromethane.svg

| ImageFile_Ref = {{chemboximage|correct|??}}

| ImageSize = 100

| ImageName = Stereo, skeletal formula of bromochloromethane with all explicit hydrogens added

| ImageFile1 = Bromochloromethane-3D-sf.png

| ImageFile1_Ref = {{chemboximage|correct|??}}

| ImageSize1 = 100

| ImageName1 = Spacefill model of bromochloromethane

| PIN = Bromo(chloro)methane

| OtherNames = {{unbulleted list|Bromochloromethane|Borothene{{citation needed|date=June 2012}}|Chloromethyl bromide|Halon 1011|Methylene bromochloride|Methyl chlorobromide|Monochloromonobromomethane|Chlorobromomethane|Fluorocarbon 1011

}}

|Section1={{Chembox Identifiers

| Abbreviations = {{unbulleted list

| BCM{{citation needed|date=June 2012}}

| CBM

| UN 1887}}

| CASNo = 74-97-5

| CASNo_Ref = {{cascite|correct|CAS}}

| UNII_Ref = {{fdacite|correct|FDA}}

| UNII = 45WX84110G

| PubChem = 6333

| ChemSpiderID = 6093

| ChemSpiderID_Ref = {{chemspidercite|correct|chemspider}}

| EINECS = 200-826-3

| UNNumber = 1887

| KEGG = C02661

| KEGG_Ref = {{keggcite|correct|kegg}}

| MeSHName = bromochloromethane

| ChEBI = 17194

| ChEBI_Ref = {{ebicite|correct|EBI}}

| ChEMBL = 346918

| ChEMBL_Ref = {{ebicite|correct|EBI}}

| RTECS = PA5250000

| Beilstein = 1730801

| Gmelin = 25577

| 3DMet = B00481

| SMILES = ClCBr

| StdInChI = 1S/CH2BrCl/c2-1-3/h1H2

| StdInChI_Ref = {{stdinchicite|correct|chemspider}}

| StdInChIKey = JPOXNPPZZKNXOV-UHFFFAOYSA-N

| StdInChIKey_Ref = {{stdinchicite|correct|chemspider}}

}}

|Section2={{Chembox Properties

| C=1 | H=2 | Br=1 | Cl=1

| Appearance = Colorless liquid

| Odor = Chloroform-like

| Density = 1.991{{nbsp}}g·mL⁻¹

| MeltingPtK = 185.2

| BoilingPtK = 341

| Solubility = 16.7{{nbsp}}g·L⁻¹

| LogP = 1.55

| VaporPressure = 15.60{{nbsp}}kPa (at 20.0{{nbsp}}°C)

| RefractIndex = 1.482

| MagSus = −86.88·10⁻⁶·cm³/mol

}}

|Section3={{Chembox Hazards

| GHSPictograms = {{gHS corrosion}} {{gHS exclamation mark}}

| GHSSignalWord = DANGER

| HPhrases = {{h-phrases|315|318|332|335}}

| PPhrases = {{p-phrases|261|280|305+351+338}}

| LD50 = {{unbulleted list

| 5{{nbsp}}g·mol⁻¹ (oral, rat)

| 20{{nbsp}}g·kg⁻¹ (dermal, rabbit)

| 4300{{nbsp}}mg·kg⁻¹ (oral, mouse){{IDLH|74975|Chlorobromomethane}}

}}

| PEL = TWA 200{{nbsp}}ppm (1050{{nbsp}}mg/m³){{PGCH|0123}}

| IDLH = 2000{{nbsp}}ppm

| REL = TWA 200{{nbsp}}ppm (1050{{nbsp}}mg/m³)

| FlashPt = Non-combustible

| FlashPt_ref =

| LC50 = 3000{{nbsp}}ppm (mouse, 7{{nbsp}}hr)

| LCLo = {{ubl

| 28,800{{nbsp}}ppm (rat, 15{{nbsp}}min)

| 29,000{{nbsp}}ppm (rat, 15{{nbsp}}min)

| 27,000{{nbsp}}ppm (mouse, 15{{nbsp}}min)

}}

}}

|Section4={{Chembox Related

| OtherFunction_label = alkanes

| OtherFunction = {{unbulleted list|Chloromethane|Chloroiodomethane|Dibromochloromethane}}

| OtherCompounds = 2-Chloroethanol

}}

}}

Bromochloromethane or methylene bromochloride and Halon 1011 is a mixed halomethane. It is a heavy low-viscosity liquid with refractive index 1.4808.

Halon 1011 was invented for use in fire extinguishers in Germany during the mid-1940s, in an attempt to create a less toxic, more effective alternative to carbon tetrachloride. This was a concern in aircraft and tanks as carbon tetrachloride produced highly toxic by-products when discharged onto a fire. It was slightly less toxic, and used up until the late 1960s, being officially banned by the NFPA for use in fire extinguishers in 1969, as safer and more effective agents such as halon 1211 and 1301 were developed. Due to its ozone depletion potential its production was banned from January 1, 2002, at the Eleventh Meeting of the Parties for the Montreal Protocol on Substances that Deplete the Ozone Layer.

File:Aircraft A-20 CBM.jpg

File:Pyrene 1qt. pump-type chlorobromomethane.jpg

Bromochloromethane's biodegradation is catalyzed by the hydrolase enzyme alkylhalidase:

:CH₂BrCl + H₂O → CH₂O + HBr + HCl