methanol

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methanol,

 

methyl alcohol,

or

wood alcohol,

CH3OH, a colorless, flammable liquid that is miscible with water in all proportions. Methanol is a monohydric alcoholalcohol,
any of a class of organic compounds with the general formula R-OH, where R represents an alkyl group made up of carbon and hydrogen in various proportions and -OH represents one or more hydroxyl groups.
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. It melts at −97.8°C; and boils at 67°C;. It reacts with certain acids to form methyl esters. Methanol is a fatal poison. Small internal doses, continued inhalation of the vapor, or prolonged exposure of the skin to the liquid may cause blindness. As a result, commercial use of methanol has sometimes been prohibited. Methanol is used as a solvent for varnishes and lacquers, as an antifreeze, and as a gasoline extender in the production of gasoholgasohol,
a gasoline extender made from a mixture of gasoline (90%) and ethanol (10%; often obtained by fermenting agricultural crops or crop wastes) or gasoline (97%) and methanol, or wood alcohol (3%).
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. Large amounts of it are used in the synthesis of formaldehydeformaldehyde
, HCHO, the simplest aldehyde. It melts at −92°C;, boils at −21°C;, and is soluble in water, alcohol, and ether; at STP, it is a flammable, poisonous, colorless gas with a suffocating odor.
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. Because of its poisonous properties, methanol is also used as a denaturant for ethanol. Methanol is often called wood alcohol because it was once produced chiefly as a byproduct of the destructive distillation of wood. It is now produced synthetically by the direct combination of hydrogen and carbon monoxide gases, heated under pressure in the presence of a catalyst.

methanol

[′meth·ə‚nȯl]
(organic chemistry)

methanol

a colourless volatile poisonous liquid compound used as a solvent and fuel. Formula: CH3OH
References in periodicals archive ?
Pale Yellow (30 mg); Melting point: 228 [degrees]C; UV(MeOH) 337, 265, 215; IR (KBr) [[upsilon].sub.max] [cm.sup.-1]: 3425, 1668, 1637, 1618; [.sup.1]HNMR(500 MHz [C.sub.5][D.sub.5]N,) ([delta]ppm): (J in Hz) 7.21 (d, H each, J = 9.1, H-3'5'), 7.86 (d, H each, J= 9.1, H-2'6'), 7.08 (d, H, J= 2.1, H-8), 6.88 (s, H, H-3), 6.84 (d, H, J=2.1, H-6), 5.85 (d, H, J = 7.5, H -1"), 4.57 (dd,H, J= 1.6, 1.6, H -6"), 4.37 (dd, H, J= 1.6, 1.6, H -6"), 4.40 (H, m, H -3"), 4.35 (m, H, H -2"); 4.23 (m, H, H -5"),4.35 (m, H).
The solvent was evaporated and the formed precipitate was filtered off, recrystallized from ethanol to yield yellow powder in 74% yield, m.p.215-217[degrees]C [R.sub.f] = 0.31 (5% MeOH in [CHCl.sub.3]).
aeruginosa, while MeOH and DCM extracts did not exhibit any activity in tested concentrations.
In reaction with chromogenic radicals, the largest number of electrons are exchanged in buffer (7.4), while the lowest one was observed in MeOH (DPPH ) and in water (ABTS+).
When the amounts of [H.sub.2][O.sub.2], Ca[Cl.sub.2], and glacial acetic acid were fixed, the yield of CDCA increased with the increasing amount of MeOH in a certain range.
The high polarity of the first solvent MeOH: [H.sub.2]O (50 : 50 v/v) eluted mainly pigments, which fluoresced when exposed to UV light.
Caption: FIGURE 2: The 9/1 methanol (MeOH)/chloroform (CH[Cl.sub.3]) and the 1/1 MeOH/[H.sub.2]O solvents were used to extract metabolites from the hPMSCs and [GFP.sup.+]hPMSCs.
Brown oil (MeOH); [[alpha]].sup.25.sub.D] -43.1 (c 0.12, methanol); UV (methanol) [[lambda].sub.max] (log [epsilon]): 210 (3.83), 270 (3.20), 303 (3.02) nm; CD (c 5.5 x [10.sup.-3] M, methanol): [lambda] ([DELTA][epsilon]) 220 (2.22), 240 (-0.44), 277 (0.78), 352 (0.22); IR (neat) [v.sub.max] : 3384 (br), 2937, 2878,1680,1447,1382,1263,1022 [cm.sup.-1]; for [sup.1]H NMR and [sup.13]C NMR data see Table 1; Positive HRESI-MS: m/z 389.1587 [[M + Na].sup.+] (calcd.
Briefly, the MeOH residue was suspended in a solution of Me0H/[H.sub.2]O (9:1) (0.5 L) and partitioned successively with n-hexane, chloroform, and ethyl acetate (3 x 0.2 L each), furnishing 7.93, 7.21, and 4.09 g, respectively.
After a filtering procedure, the extract was concentrated to obtain methanol (MeOH) crude extract, 9.52 g.