Methyl silicate

Methyl silicate, 93 a-Methylstyrene, 93 Methyl-tert-butyl ether, 90 Methyl thiocyanate, 93 Methylthiouracil, 93 Methyltrichlorosilane, 94 Methyl vinyl ketone, 94 Methylal, 89 Metolachlor, 94 Metolcarb, 94 Metorex (Pty) Ltd., 199 Metribuzin, 94 Metronidazole, 94 Mevinphos, 94 Mexacarbate, 94... 

S. Sampath and O. Lev, Membrane-free, rhodium-modified, methyl silicate-graphite amperometric biosensor. J. Electroanal. Chem. 426, 131—137 (1997). 

Toxieology. Methyl silicate is a severe eye irritant and is an irritant of the nose and throat. 

Application of undiluted methyl silicate to the eyes of rabbits caused marked edema and necrosis of the eyelid. Exposure of rats to 250ppm for 4 hours caused death in all six animals, whereas none died after exposure to 125 ppm for 4 hours. 

Human experience indicates that methyl silicate exposure has a delayed action on the eyes, causing slight or no immediate effect that is followed, after a latent period of several hours, by potentially serious injury to the eyes. ... 

The 2003 ACGIH threshold limit valuetime-weighted average (TLV-TWA) for methyl silicate is Ippm (6mg/m ). 

Schwarz and Knauff (64) approached the problem of the poly-silicic acids quite differently, by preparing linear partial hydrolysis products of methyl silicate,... 

Starting with three pounds each of the zinc diethyl and ethyl silicate, Ladenburg prepared all of the ethylethoxysilanes and described their properties. He also was able to show that the reaction was not a simple reduction of ethoxy groups to ethyl groups by the action of sodium, for methyl silicate and zinc ethyl gave e %imethoxysilanes. It is probable that the sodium reacted first with the zinc alkyl, as proposed by Ladenburg,... 

METHYL NITRITE METHYL ORTHO SILICATE see METHYL SILICATE 2606 624-91-9 ... 

METHYL SILICATE METHYL STYRENE see ISOPROPENYL BENZENE METHYL SULFATE see DIMETHYL SULFATE METHYL SULFIDE see DIMETHYL SULFIDE 2606 681-84-5 ... 

CH3OH seems to be particularly difficult to purify. It has been shown by R. B. Porter, J. Phys. Chcm., 61, 1260 (1957), that CH3OH in pyrex or quartz will always contain small amounts of methyl borate and methyl silicate unless H2O is present to cause hydrolysis of those esters. Dry CH3OH in pyrex will thus contain II2O + (CIl30)8B in significant amounts. 

In these electrodes, the silica sol-gel is mixed with graphite or carbon black powder. At a critical concentration of carbon within the sol-gel (beyond the percolation threshold), there becomes a continuous path(s) of conductive carbon throughout the system. The sol-gel system used was a methyl silicate network (by using methyltrimethoxysilane as the sol-gel precursor, the resulting network has exposed SiCH3 groups), which imparts hydrophobic properties to the electrode... 

CCEs have also been used in conjunction with enzymes. Glucose oxidase was encapsulated within the methyl silicate (or silica)-graphite composite [216, 220]. Reduced oxygen from the enzymatic reaction results in the production of H2O2, which is oxidized at the electrode. Palladium and rhodium catalysts have been added to the electrode to help lower the over voltage required for hydrogen peroxide oxidation [219, 221]. Glucose oxidase and horseradish peroxidase have been simultaneously entrapped within a CCE for a biosensor that does not require a... 

Figure 6.13 Synthetic route of siliconates to polysiloxanes (a) reaction of siliconate with acid to give a methyl silanol, followed by further decomposition in the presence of atmospheric carbon dioxide to methyl silicic acid and alkali carbonate (b) formation of polysiloxanes from methyl silicic acid via intermolecular condensation. X = Na, K...

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