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1,2,3,4-Butanetetracarboxylic acid is an organic compound with the formula HO 2 CCH 2 CH(CO 2 H)CH(CO 2 H)CH 2 CO 2 H. It is one of the simplest stable tetracarboxylic acids. The compound exists as two diastereomers, meso and the (R,R)/(S,S) pair. All are white solids. The compound is produced by oxidation of tetrahydrophthalic anhydride. [1]
1.1.1.1 is a free Domain Name System (DNS) service by the American company Cloudflare in partnership with APNIC. [ 7 ] [ needs update ] The service functions as a recursive name server , providing domain name resolution for any host on the Internet .
A proxy server may reside on the user's local computer, or at any point between the user's computer and destination servers on the Internet.A proxy server that passes unmodified requests and responses is usually called a gateway or sometimes a tunneling proxy.
1,3-Dichloro-1,1,2,2,3-pentafluoropropane (HCFC-225cb, chemical formula C 3 HF 5 Cl 2) is a hydrochlorofluorocarbon.It is a volatile derivative of propane which has served as an HCFC replacement for the CFC, 1,1,2-trichloro-1,2,2-trifluoroethane which was used as a cleaning agent which has been used in the aerospace and electronics industries [2] since the phase out of class 1 ozone depleting ...
1,1,1,3,3,3-Hexachloropropane is a compound of chlorine, hydrogen, and carbon, with chemical formula C 3 Cl 6 H 2, specifically Cl 3 C−CH 2 −CCl 3. Its molecule can be described as that of propane with chlorine atoms substituted for the six hydrogen atoms on the extremal carbons. [ 4 ]
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1,1,1-Trichloro-2,2,2-trifluoroethane, also called Asymmetrical trichlorotrifluoroethane or CFC-113a, is a chlorofluorocarbon (CFC) with the formula CCl 3 CF 3.
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