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Ipectrum Laboratories Chemical Fact Sheet-Cas It 1634044 http//www speclab cum/compound/c1634044 111111111111 Jill »�E ��Illll I Chemical Fact Sheet 1 _ Chen ucal Abstract Number i11634044 (CAS #) ..___ . Synonyms �MEthyl tert-huty7 ether FTS ' -Analytical Method- - Molecular Formula JC5H 120 l - _ - - -- __ � � - -�� - � jOctane booster m gasoline Manufacture ol`"isobuteiie iJnleaded gasoline usually y' Use Econtams additives for octane improvement including methyl tert-butyl ether I(MTBE) Gasoline octane component, 100%CHEMICAL PROFILE Methyl Cert-butyl ether Consumption Patterns ;Demand 1988 65,500 barrels per day, 1989 72,500 barrels per day, 1993 1projected! 90,000 barrels per day (average daily consumption, foreign trade is 'negligible) 1 _ Apparent Color ;Colorless liquid Boiling Point 155 2 DEG C --- -- Mefting Point Molecular Wei7gNt F88-1-5 � s J Density ;U-7-405 is 0 DEG C/415EG C- t-Butyl methyl ether may be released as a result of its use as an octane booster for lunleaded gasoline and its use in the manufacture of isobutene If t-butyl methyl ether i is released to soil,it will be subject to volatilization It will be expected to exhibit ;very high mobility in soil and, therefore,it may leach to groundwater It will not be !expected to hydrolyze in soil If t-butyl methyl ether is released to water, it will not ,be expected to significantly adsorb to sediment or suspended particulate matter, 'btoconcentrate in aquatic organisms,hydrolyze,directly photolyze, or photooxtdize 1 ,via reaction with photochernically produced hydroxyl radicals in the water,based jupon estimated physical-chemical properties or analogies to other structurally ,related aliphatic ethers t-Butyl methyl ether in surface water will be subject to rapid 1 ,volatilization with estimated half-lives of 4 1 hr and 2 0 days for volatilization from Environmental Impact a river one meter deep flowing 1 rn/sec with a wind velocity of 3 m/sec and a model _'pond,respectively It may be resistent to biodegradation in environmental media ,based upon screening test data from a study using activated sludge inocula Many 1 , `ethers are known to be resistant to biodegradation If t-butyl methyl ether is released to the atmosphere, it will be expected to exist almost entirely in the vapor phase based on its vapor pressure It will be susceptible to photoxidation via vapor phase ' !reaction with photochemically produced hydroxyl radicals with an estimated !half--life of 5 6 days for this process Direct photolysis will not be an important removal process since aliphatic ethers do not adsorb light at wavelenghts>290 nm The most probable route of general population exposure to t-butyl methyl ether is 1 'probably via inhalation of contaminated air Exposures through dermal contact may ,occur m occupational settings ETERRESTMIAL FATE If i-butyl methyl ethei is released to soil,it will be subject- - Eto volatilization based upon a reported Henry's Law constant of 5 87X10-4 atm-cu �m/mole and vapor pressure of 249 mm Hg at 25 deg C It will be expected to exhibit very high mobility(5,SRC)in soil and,therefore,it may leach to i 1 oft _ 06l1N7(]fl3 4 08