Editing Chloromethane (section)

==Dispersion in the environment==

[[File:CH3Cl_mm.png|thumb|left|CH<sub>3</sub>Cl measured by the Advanced Global Atmospheric Gases Experiment ([http://agage.mit.edu/ AGAGE]) in the lower atmosphere ([[troposphere]]) at stations around the world. Abundances are given as pollution free monthly mean mole fractions in [[Parts-per notation|parts per trillion]].]]

Most of the methyl chloride present in the environment ends up being released to the [[atmosphere]]. After being released into the air, the atmospheric lifetime of this substance is about 10 months with multiple natural sinks, such as ocean, transport to the stratosphere, soil, etc.<ref name ="RefA">{{cite journal|vauthors=Fabian P, Borchers R, Leifer R, Subbaraya BH, Lal S, Boy M |title=Global stratospheric distribution of halocarbons |journal= Atmospheric Environment |volume=30 |number=10/11 |pages=1787–1796 |date=1996|doi=10.1016/1352-2310(95)00387-8 |bibcode=1996AtmEn..30.1787F }}</ref><ref>{{cite journal|vauthors=Zhang W, Jiao Y, Zhu R, Rhew RC |title= Methyl Chloride and Methyl Bromide Production and Consumption in Coastal Antarctic Tundra Soils Subject to Sea Animal Activities|journal= Environmental Science & Technology |volume=54 |number=20 |pages=13354–13363 |date=2020|doi=10.1021/acs.est.0c04257|pmid= 32935983|bibcode= 2020EnST...5413354Z|s2cid= 221745138}}</ref><ref>{{cite journal|vauthors=Carpenter LJ, Reimann S, Burkholder JB, Clerbaux C, Hall BD, Hossaini R, Laube JC, Yvon-Lewis SA |title= Update on ODSs and Other Gases of Interest to the Montreal Protocol|journal= WMO (World Meteorological Organization), Scientific Assessment of Ozone Depletion: 2014, Global Ozone Research and Monitoring Project |date=2014|url=https://www.esrl.noaa.gov/csl/assessments/ozone/2014/summary/ch1.html}}</ref>

On the other hand, when the methyl chloride emitted is released to water, it will be rapidly lost by [[volatilization]]. The [[half-life]] of this substance in terms of volatilization in the river, lagoon and lake is 2.1&nbsp;h, 25&nbsp;h and 18&nbsp;days, respectively.<ref>{{cite book|last1=Lyman |first1=Warren |authorlink1=XPTO |last2=Rosenblatt |first2=David |authorlink2=XPTO |last3=Reehl |first3=William |date=1982 |title=Handbook of chemical property estimation methods|publisher=McGraw-Hill |isbn=9780070391758 |url=https://archive.org/details/handbookofchemic0000lyma |url-access=registration }}</ref><ref name="RefB">{{cite book|author=Agency for Toxic Substances and Disease Registry |url=https://www.ncbi.nlm.nih.gov/books/NBK600824/ |title=Toxicological profile for chloromethane |series=Agency for Toxic Substances and Disease Registry (ATSDR) Toxicological Profiles |date=1990|publisher=Agency for Toxic Substances and Disease Registry (US) |pmid=38412209 }}</ref>

The amount of methyl chloride in the [[stratosphere]] is estimated to be 2{{e|6}} tonnes per year, representing 20–25% of the total amount of chlorine that is emitted to the stratosphere annually.<ref name ="RefC">{{cite journal|vauthors=Borchers R, Gunawardena R, Rasmussen RA |title=Long term trend of selected halogenated hydrocarbons |pages=259–262 |date=1994 |url=https://ntrs.nasa.gov/citations/19950004240 |id=19950004240 |journal=Ozone in the Troposphere and Stratosphere |publisher=NASA}}</ref><ref name ="RefD">{{cite journal|vauthors=Crutzen PJ, Gidel LT |title=The tropospheric budgets of the anthropogenic chlorocarbons CO, CH4, CH3Cl and the effect of various NOx sources on tropospheric ozone |journal=Journal of Geophysical Research |volume=88 |pages=6641–6661 |date=1983|doi=10.1029/JC088iC11p06641 }}</ref>