methanesulfonic acid


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methanesulfonic acid

[¦meth‚ān·səl′fän·ik ′as·əd]
(organic chemistry)
CH3SO2OH A solid with a melting point of 20°C; used as a catalyst in polymerization, esterification, and alkylation reactions, and as a solvent. Also known as methysulfonic acid.
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Therefore, methanesulfonic acid solutions with concentrations in the range of 0.5-15.3 M were used for the treatment in this work.
It is readily biodegradable and, unlike other grades of methanesulfonic acid, is produced using a process that does not use chlorine.
Here it worth to notice that, there is no wide difference in the values of [E.sub.g] for PANI-OH doped by iminodiacetic acid, methanesulfonic acid, and phosphoric acid (3.18-3.26 eV).
The use of strong methanesulfonic acid, drastically reduced the molecular weight of the polymer.
After a construction time of nearly two years, BASF has now started up production in the plant extension used to manufacture methanesulfonic acid in Ludwigshafen.
Polymer Monomer [[eta].sub.inh] (a) Yields [T.sub.d.sup.b] code Code (dL/g) (%) ([degrees]C) [III.sub.a] [V.sub.a1] 1.55 91.1 516 [III.sub.a] [V.sub.a2] 0.78 94.8 504 [III.sub.a] [V.sub.a3] 1.28 96.4 515 [III.sub.a] [V.sub.a4] 1.02 93.7 482 [III.sub.a] [V.sub.a5] 2.04 98.3 518 [III.sub.b] [V.sub.b1] 2.17 92.3 502 [III.sub.b] [V.sub.b2] 0.63 91.6 508 [III.sub.b] [V.sub.b3] 0.91 95.7 534 [III.sub.b] [V.sub.b4] 0.65 92.5 495 [III.sub.b] [V.sub.b5] 0.98 94.8 526 Monomer Polymer code Char yield (c) (%) [III.sub.a] 55 [III.sub.a] 55 [III.sub.a] 65 [III.sub.a] 53 [III.sub.a] 54 [III.sub.b] 52 [III.sub.b] 43 [III.sub.b] 68 [III.sub.b] 45 [III.sub.b] 46 (a) Inherent viscosity was measured at a concentration of 0.5 g/dL in methanesulfonic acid (MSA) at 30[degrees]C.
- high purity methanesulfonic acid that combines outstanding cleaning performance with an excellent ecotoxic profile and good material compatibility, - dye transfer inhibitors for low temperature washing which can be used in combination with optical effect products and which provide excellent results for bright colors and brilliant white, - a highly effective and readily biodegradable chelating agent that can be used as an alternative to phosphates in dishwashing detergents, - special surfactants for heavy dirt removal.
4,4'-Thiodiphenol, phosphorus pentoxide, and methanesulfonic acid from Aldrich Chemical Co., and 2-chloroethyl vinyl ether from Tokyo Kasei Kogyo Co.