• Oxiranecarboxylic acid, potassium salt
• 51877-54-4
• C₃H₄O₃·K
• .

• Oxirane, 2-(chloromethyl)-3-(2-propenyl)-
• 51903-22-1
• C₆H₉ClO
• .

• Oxiranecarboxylic acid, oxiranylmethyl ester
• 13406-99-0
• C₆H₈O₄
• .

• Oxirane, 2-[(dodecyloxy)methyl]-3-(3-oxiranylpropyl)-
• 51944-02-6
• C₂₀H₃₈O₃
• .

• Octanoic acid, antimony(3+) salt
• 13417-00-0
• C₈H₁₆O₂·1/₃Sb
• .

• Octadecanoic acid, 11-hydroxy-
• 13419-91-5
• C₁₈H₃₆O₃
• .

• O,O-dimethyl S-{[5-(methylsulfanyl)-2-oxo-1,3,4-thiadiazol-3(2H)-yl]methyl} phosphorodithioate
• 13432-51-4
• C₆H₁₁N₂O₃PS₄
• 318.3969
• .

• Octanenitrile, 2-methyl-2-[(trimethylsilyl)oxy]-
• 51990-77-3
• C₁₂H₂₅NOSi
• .

• Octanamide, 8-bromo-N-butyl-N-methyl-
• 134414-26-9
• C₁₃H₂₆BrNO
• .

• Octanimidic acid, methyl ester, hydrochloride
• 52011-54-8
• C₉H₁₉NO·ClH
• .

• octadecan-3-ol
• 111897-18-8
• C₁₈H₃₈O
• 270.4937
• .

• O-(1-methylbutyl) ethylthiocarbamate
• 120903-92-6
• C₈H₁₇NOS
• 175.2917
• .

• Oxonium, acetyl[3-(acetyloxy)-1-methyl-3-phenyl-2-propenylidene]-,perchlorate
• 121262-15-5
• C₁₄H₁₅O₄·ClO₄
• .

• Octadecenoic acid, calcium salt, (Z)-
• 121313-10-8
• C₁₈H₃₄O₂·1/₂Ca
• .

• Osmium, compd. with scandium (2:1)
• 12137-63-2
• Os₂Sc
• .

• Oxirane, 2-(4-chlorophenyl)-3-phenyl-, (2S,3S)-
• 121960-04-1
• C₁₄H₁₁ClO
• .

• Osmium, compd. with uranium (1:2)
• 12202-41-4
• OsU₂
• .

• O,O-diisopropyl hydrogen dithiophosphate, compound with cyclohexylamine (1:1)
• 50329-34-5
• C₁₂H₂₈NO₂PS₂
• 256-548-8
• 313.46
• .

• Oxirane, [[(1-bromo-2-naphthalenyl)oxy]methyl]-
• 122432-36-4
• C₁₃H₁₁BrO₂
• .

• Oxazolo[4,5-b]pyridin-2(3H)-one, 6-bromo-3-methyl-
• 122451-00-7
• C₇H₅BrN₂O₂
• .

• Oxirane, 2-methyl-2-(4-methyl-3-pentenyl)-
• 50340-32-4
• C₉H₁₆O
• .

• Octanoic acid, 8-(acetylthio)-
• 503564-61-2
• C₁₀H₁₈O₃S
• .

• Osmium, compd. with zirconium (2:1)
• 12299-07-9
• Os₂Zr
• .

• Oxiranecarboxylic acid, 3-methyl-, methyl ester, (2R,3S)-
• 50468-20-7
• C₅H₈O₃
• .

• Oxiranemethanol, 3-methyl-, (2S,3S)-
• 50468-21-8
• C₄H₈O₂
• .

• Oxirane, 2,2-dimethyl-3-[3-methyl-5-(2-propynyloxy)-3-pentenyl]-
• 50502-49-3
• C₁₃H₂₀O₂
• .

• Octanoic acid, 8-(octylseleno)-
• 50514-64-2
• C₁₆H₃₂O₂Se
• .

• O-(3-fluoro-4-nitrophenyl) O,O-dimethyl thiophosphate
• 50589-90-7
• C₈H₉FNO₅PS
• 281.1979
• .

• O-(3-bromo-4-nitrophenyl) O,O-dimethyl thiophosphate
• 50589-92-9
• C₈H₉BrNO₅PS
• 342.1035
• .

• O-(3-iodo-4-nitrophenyl) O,O-dimethyl thiophosphate
• 50589-94-1
• C₈H₉INO₅PS
• 389.104
• .

• O-(2-fluoro-4-nitrophenyl) O,O-dimethyl thiophosphate
• 50589-96-3
• C₈H₉FNO₅PS
• 281.1979
• .

• O,O-dimethyl O-[4-nitro-2-(trifluoromethyl)phenyl] thiophosphate
• 50589-98-5
• C₉H₉F₃NO₅PS
• 331.2054
• .

• Oxirane,[[5-[2-chloro-4-(trifluoromethyl)phenoxy]-2-nitrophenoxy]methyl]-
• 50594-58-6
• C₁₆H₁₁ClF₃NO₅
• .

• Octane, 1-iodo-3,7-dimethyl-
• 124186-79-4
• C₁₀H₂₁I
• .

• Oxazole, 4,5-dihydro-5,5-dimethyl-2-(2-phenylethenyl)-
• 124210-99-7
• C₁₃H₁₅NO
• .

• Octacosane, 2,14-dimethyl-
• 124234-34-0
• C₃₀H₆₂
• .

• O,O-bis(4-bromo-2,5-dichlorophenyl) phenylphosphonothioate
• 50654-88-1
• C₁₈H₉Br₂Cl₄O₂PS
• 621.9216
• .

• Oxiranemethanol, 2-methyl-, benzoate
• 124493-19-2
• C₁₁H₁₂O₃
• .

• Oxiranemethanol, 2-butyl-
• 124493-22-7
• C₇H₁₄O₂
• .

• Octanenitrile, 2-chloro-2-methyl-5-oxo-
• 125031-32-5
• C₉H₁₄ClNO
• .

• Oxaziridine, 3,3-diethyl-
• 50673-00-2
• C₅H₁₁NO
• .

• octadecaborane
• 12513-42-7
• H₂₀B₁₈
• 214.7568
• .

• oxygen(-2) anion; technetium(+7) cation
• 12534-35-9
• O₄Tc₃
• 357.7121
• .

• Oxirane,2-(3-chloro-4-methyl-4-pentenyl)-3-[(4-ethylphenoxy)methyl]-2-methyl-
• 50714-79-9
• C₁₈H₂₅ClO₂
• .

• Oxiranemethanol, 3-(3-chlorophenyl)-
• 125617-30-3
• C₉H₉ClO₂
• .

• Octane, 8-(ethenyloxy)-1,1,1,2,2,3,3,4,4,5,5,6,6-tridecafluoro-
• 125660-00-6
• C₁₀H₇F₁₃O
• .

• Oxetane, 3,3'-[1,4-butanediylbis(oxymethylene)]bis[3-ethyl-
• 126050-33-7
• C₁₆H₃₀O₄
• .

• Oxiranemethanol, 3-methyl-3-(4-methyl-3-pentenyl)-, acetate
• 50727-95-2
• C₁₂H₂₀O₃
• .

• Osmium chloride
• 12648-41-8
• Unspecified
• .

• Oxirane, 2,2-dimethyl-3-(3-methyl-5-phenoxy-3-pentenyl)-
• 50822-77-0
• C₁₆H₂₂O₂
• .