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Maleinanhydrid C4H2O3 C4H2O3 Mr = 98,058
Maleinová kyselina
(cis-butendiová kys.)		 C4H4O4 C4H4O4 Mr = 116,073
Malonová kyselina
(propandiová kys.)		 C3H4O4 HOOC-CH2-COOH Mr = 104,062
Maltosa
[sladový cukr]
(4-O-a-D-glukopyranosyl-D-glukopyranosan)		 C12H22O11 C12H22O11 Mr = 342,301
Mandlová kyselina
(a-hydroxyfenyloctová kys.)		 C8H8O3 C8H8O3 Mr = 152,150
Manganan draselný K2MnO4 Mr = 197,132
Manganičnan draselný K3MnO4 Mr = 236,230
Manganistan draselný KMnO4 Mr = 158,034
Mannitol
[mannit]		 C6H14O6 C6H14O6 Mr = 182,174
D-Mannosa C6H12O6 C6H12O6 Mr = 180,158
Máselná kyselina viz Butanová kyselina
(Máselnan methylnatý) viz Methylbutanoát
3-Merkapto-2-aminopropanová kyselina viz Cystein
Mesitylen viz 1,3,5-Trimethylbenzen
(Methakrolein) viz 2-Methylpropenal
Methakrylamid C4H7NO C4H7NO Mr = 85,106
Methakrylonitril C4H5N C4H5N Mr = 67,091
Methakrylová kyselina C4H6O2 C4H6O2 Mr = 86,091
Methan CH4 Mr = 16,043
Methanal viz Formaldehyd
Methanol CH4O CH3OH Mr = 32,042
Methanthiol (methylmerkaptan) CH4S CH3SH Mr = 48,109
Methionin
(2-amino-4-methylthiobutanová kyselina)		 C5H11NO2S C5H11NO2S Mr = 149,214
2-Methoxyanilin
(o-anisidin, o-aminoanisol)		 C7H9NO C7H9NO Mr = 123,155
3-Methoxyanilin
(m-anisidin, m-aminoanisol)		 C7H9NO C7H9NO Mr = 123,155
4-Methoxyanilin
(p-anisidin, p-aminoanisol)		 C7H9NO C7H9NO Mr = 123,155
Methoxybenzen (anisol) C7H8O C7H8O Mr = 108,140
4-Methoxybenzoová kyselina
(p-anisová kys.)		 C8H8O3 C8H8O3 Mr = 152,150
Methoxyethan viz Ethylmethylether
2-Methoxyethanol
(methylcellosolve)		 C3H8O2 CH3O-CH2CH2-OH Mr = 76,096
Methoxyethen viz Methylvinylether
2-Methoxyethylacetát C5H10O3 CH3COO-CH2CH2-OCH3 Mr = 118,133
2-Methoxyfenol (guajakol) C7H8O2 C7H8O2 Mr = 124,140
2-Methoxynitrobenzen
(o-nitroanisol)		 C7H7NO3 C7H7NO3 Mr = 153,138
N-Methylacetamid C3H7NO CH3CO-NH-CH3 Mr = 73,095
Methylacetát C3H6O2 CH3COO-CH3 Mr = 74,080
Methylacetoacetát C5H8O3 CH3CO-CH2COO-CH3 Mr = 116,117
Methylacetylen viz Propin
Methylakrylát C4H6O2 CH2=CH-COO-CH3 Mr = 86,091
Methylal viz Dimethoxymethan
Methylamin (methanamin) CH5N CH3-NH2 Mr = 31,058
2-Methyl-2-aminopropan viz terc. Butylamin
N-Methylanilin C7H9N C7H9N Mr = 107,155
2-Methylanilin (o-toluidin) C7H9N C7H9N Mr = 107,155
3-Methylanilin
(m-toluidin)		 C7H9N C7H9N Mr = 107,155
4-Methylanilin
(p-toluidin)		 C7H9N C7H9N Mr = 107,155
Methylbenzoát C8H8O2 C8H8O2 Mr = 136,151
Methylbromid viz Brommethan
2-Methyl-1,3-butadien viz Isopren
2-Methylbutan
(isopentan)		 C5H12 C5H12 Mr = 72,151
Methylbutanoát
(methylbutyrát)		 C5H10O2 CH3CH3CH2COO-CH3 Mr = 102,134
3-Methyl-1-butanol
(isoamylalkohol, isopentylalkohol)		 C5H12O C5H12O Mr = 88,150
3-Methylbutylacetát
(isoamylacetát, isopentylacetát)		 C7H14O2 C7H14O2 Mr = 130,187
Methylcelulosa viz Celulosa - methylether
Methylcellosolve viz 2-Methoxyethanol
Methylcyklohexan C7H14 C7H14 Mr = 98,189
1-Methylcyklohexanol C7H14O C7H14O Mr = 114,188
cis-2-Methylcyklohexanol C7H14O C7H14O Mr = 114,188
trans-2-Methylcyklohexanol C7H14O C7H14O Mr = 114,188
cis-3-Methylcyklohexanol C7H14O C7H14O Mr = 114,188
trans-3-Methylcyklohexanol C7H14O C7H14O Mr = 114,188
cis-4-Methylcyklohexanol C7H14O C7H14O Mr = 114,188
trans-4-Methylcyklohexanol C7H14O C7H14O Mr = 114,188
Methylcyklopentan C6H12 C6H12 Mr = 84,162
2-Methylen-1,4-butandiová kyselina viz Itakonová kyselina
(Methylenchlorid) viz Dichlormethan
(Methylethylketon) viz Butanon
N-Methylformamid C2H5NO H-CO-NH-CH3 Mr = 59,068
Methylformiát C2H4O2 HCOO-CH3 Mr = 60,053
2-Methylhexan
(isoheptan)		 C7H16 C7H16 Mr = 100,205
3-Methylhexan C7H16 C7H16 Mr = 100,205
Methylhydrazin CH6N2 NH2NH-CH3 Mr = 46,072
(Methylchlorid) viz Chlormethan
Methylkyanoacetát C4H5NO2 NC-CH2COO-CH3 Mr = 99,089
(Methylmerkaptan) viz Methanthiol
Methylmethakrylát C5H8O2 C5H8O2 Mr = 100,118
Methyloxiran
(propylenoxid, 1,2-epoxypropan)		 C3H6O C3H6O Mr = 58,080
2-Methylpentan
(isohexan)		 C6H14 C6H14 Mr = 86,178
3-Methylpentan C6H14 C6H14 Mr = 86,178
2-Methylpropan (isobutan) C4H10 C4H10 Mr = 58,124
Methylpropanoát
(methylpropionát)		 C4H8O2 CH3CH2COO-CH3 Mr = 88,107
2-Methyl-1-propanol
(isobutylalkohol)		 C4H10O C4H10O Mr = 74,123
2-Methyl-2-propanol
(terc. butylalkohol)		 C4H10O C4H10O Mr = 74,123
2-Methylpropanová kyselina
(isomáselná kys., isobutyrová kys.)		 C4H8O2 C4H8O2 Mr = 88,107
2-Methylpropen
(isobutylen)		 C4H8 C4H8 Mr = 56,108
2-Methylpropenal
(methakrolein)		 C4H6O C4H6O Mr = 70,091
Methylpropionát viz Methylpropanoát
2-Methylpropoxyethen viz Isobutyl-vinylether
1-Methylpropylacetát viz 2-Butylacetát
2-Methylpropylacetát viz Isobutylacetát
2-Methylpropylakrylát viz Isobutylakrylát
1-Methylpropylamin viz 2-Butylamin
2-Methylpropylamin viz Isobutylamin
2-Methyl-2-propylamin viz terc. Butylamin
1-Methylpropylbenzen viz 2-Butylbenzen
2-Methylpropylmethakrylát viz Isobutylmethakrylát
2-Methylpyridin (a-pikolin) C6H7N C6H7N Mr = 93,128
3-Methylpyridin (b-pikolin) C6H7N C6H7N Mr = 93,128
4-Methylpyridin (g-pikolin) C6H7N C6H7N Mr = 93,128
1-Methylpyrrol (N-methylpyrrol) C5H7N C5H7N Mr = 81,117
2-Methylpyrrol (a-homopyrrol) C5H7N C5H7N Mr = 81,117
3-Methylpyrrol (b-homopyrrol) C5H7N C5H7N Mr = 81,117
1-Methyl-2-pyrrolidinon
(N-methyl-2-pyrrolidon)		 C5H9NO C5H9NO Mr = 99,133
Methylsalicylát C8H8O3 C8H8O3 Mr = 152,150
a-Methylstyren
(isopropylbenzen)		 C9H10 C9H10 Mr = 118,179
Methyltrichlorsilan CH3-SiCl3 Mr = 149,480
Methyl-vinylether
(methoxyethen)		 C3H6O CH3-O-CH=CH2 Mr = 58,080
Methyl-vinylketon
(3-buten-2-on)		 C4H6O CH3-CO-CH=CH2 Mr = 70,091
Methyl-vinylsulfid
(methylthioethen)		 C3H6S CH3-S-CH=CH2 Mr = 74,147
Methyl-vinylsulfon C3H6O2S CH3-SO2-CH=CH2 Mr = 106,146
Mléčná kyselina viz 2-Hydroxypropanová kyselina
Močová kyselina viz 2,6,8-Trihydroxypurin
Močovina (karbamid) CH4N2O NH2-CO-NH2 Mr = 60,056
Molybdenan amonný (NH4)2MoO4 Mr = 196,01
Molybdenan olovnatý PbMoO4 Mr = 367,1
Morfolin viz 4-Iminooxan
Mravenčí kyselina CH2O2 H-COOH Mr = 46,026
Myricylalkohol
(hentriakontanol)		 C31H64O CH3(CH2)30-OH Mr = 452,850
Myristová kyselina
(tetradekanová kys.)		 C14H28O2 CH3(CH2)12-COOH Mr = 228,376

SLOUČENINY
Periodická soustava prvků
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