Molecular formula
C18H18O2
292 compounds have this formula on CompoundList.
- Molar mass
- 266.34g/mol
- Monoisotopic mass
- 272.1683Da
- Atoms
- 38
- Elements
- 3
- Rings plus double bonds
- 10
The formula C18H18O2 describes a molecule made of 18 carbon atoms, 18 hydrogen atoms and 2 oxygen atoms. It is written in Hill notation: carbon first, then hydrogen, then the other elements in alphabetical order. The formula tells you which atoms are present, not how they are connected, which is why several different chemicals can share it.
Elemental composition
- C Carbon × 1881.17%12.011 × 18 = 216.198 g/mol
- H Hydrogen × 186.81%1.008 × 18 = 18.144 g/mol
- O Oxygen × 212.01%15.999 × 2 = 31.998 g/mol
Look up another formula
Compounds with the formula C18H18O2
Isomers we list, best known first. Open one to see its structure, properties, safety data and suppliers.
Showing 101 to 200 of 292 compounds
3-Hydroxy-3,4-diphenylcyclohexan-1-one
CAS 6303-86-2C18H18O2
4,4'-(1,2-Ethanediylidene)-bis(2,6-dimethyl-2,5-cyclohexadien-1-one)
CAS 59869-79-3C18H18O2
(2E)-1-(4-Ethylphenyl)-3-(4-methoxyphenyl)prop-2-en-1-one
CAS 864784-20-3C18H18O2
Estra-1,3,5,7,9-pentaen-17-one, 3-hydroxy-, (14beta)-
CAS 474-88-4C18H18O2
1,1'-(Buta-1,3-diene-2,3-diyl)bis(4-methoxybenzene)
CAS 52255-88-6C18H18O2
1,1-Diphenylethyl 2-methylprop-2-enoate
CAS 56958-95-3C18H18O2
![4-[4-(Benzyloxy)phenyl]-3,6-dihydro-2H-pyran chemical structure, C18H18O2, CAS 1121526-77-9](/s/ARDJHPVBXVNOHU-UHFFFAOYSA-N.svg)
4-[4-(Benzyloxy)phenyl]-3,6-dihydro-2H-pyran
CAS 1121526-77-9C18H18O2
Benzofuran, 2,5-dimethyl-3-(6-methoxy-m-tolyl)-
CAS 25633-57-2C18H18O2
1,2-Bis(2,4-dimethylphenyl)ethane-1,2-dione
CAS 4746-84-3C18H18O2
Benzenepropanoic acid, 3-phenyl-2-propenyl ester
CAS 28048-98-8C18H18O2
![Benzene, 1,1'-[2-butyne-1,4-diylbis(oxymethylene)]bis- chemical structure, C18H18O2, CAS 93877-21-5](/s/BRKJJOMTXGMIFB-UHFFFAOYSA-N.svg)
Benzene, 1,1'-[2-butyne-1,4-diylbis(oxymethylene)]bis-
CAS 93877-21-5C18H18O2
2,3-Dimethyl-1,4-diphenylbutane-1,4-dione
CAS 34733-55-6C18H18O2
![1-[4-(5,6,7,8-Tetrahydronaphthalen-2-yloxy)phenyl]ethanone chemical structure, C18H18O2, CAS 887576-99-0](/s/BKGSUNWBSCJTGF-UHFFFAOYSA-N.svg)
1-[4-(5,6,7,8-Tetrahydronaphthalen-2-yloxy)phenyl]ethanone
CAS 887576-99-0C18H18O2
1,2-Bis(4-ethenylphenyl)ethane-1,2-diol
CAS 32605-58-6C18H18O2
![1-Propanone, 1,1'-[1,1'-biphenyl]-2,2'-diylbis- chemical structure, C18H18O2, CAS 50703-58-7](/s/YDXIDPGBBZYEAE-UHFFFAOYSA-N.svg)
1-Propanone, 1,1'-[1,1'-biphenyl]-2,2'-diylbis-
CAS 50703-58-7C18H18O2
(5S,6S)-5,6,8,9,10,11-Hexahydrobenzo(b)phenanthrene-5,6-diol
CAS 94850-01-8C18H18O2
1,2-Bis(3,4-dimethylphenyl)ethane-1,2-dione
CAS 134462-68-3C18H18O2
1-(7-Hydroxy-9,10-dihydrophenanthren-2-yl)butan-1-one
CAS 7466-51-5C18H18O2
9-Phenanthreneethanol, 10-hydroxy-alpha,beta-dimethyl-
CAS 62108-20-7C18H18O2
1,3-Propanedione, 1-phenyl-3-(2,4,6-trimethylphenyl)-
CAS 6477-28-7C18H18O2
2H-Pyran-2-one, tetrahydro-3,4-diphenyl-6-methyl-, (3-alpha,4-alpha,6-alpha)-
CAS 80575-33-3C18H18O2
1,4-Bis(4-methoxyphenyl)buta-1,3-diene
CAS 43212-67-5C18H18O2
1-Benzyl-6-methoxy-3,4-dihydro-1H-naphthalen-2-one
CAS 247936-61-4C18H18O2
Cyclopropanecarboxylic acid, 2,2-diphenyl-, ethyl ester, (1S)-
CAS 67428-04-0C18H18O2
- Cyclopropanecarboxylic acid, 2,2-diphenyl-, ethyl ester, (1R)-162872-52-8C18H18O2
- Ctk1B5200380414-65-3C18H18O2
- Agn-PC-0NI9XW4200-18-4C18H18O2
- 1,3-Diphenylhexane-1,4-dione80460-13-5C18H18O2
- 7-Methoxy-4-(4-methoxyphenyl)-1,2-dihydronaphthalene79822-57-4C18H18O2
- 3-(3,4-Dimethylphenyl)-1-(4-methoxyphenyl)-2-propen-1-one344889-87-8C18H18O2
- 1-(3,4-Dihydro-2H-1-benzopyran-6-yl)-3-phenylpropan-1-one101019-08-3C18H18O2
- 2-Methyl-1,5-diphenylpentane-1,5-dione47074-06-6C18H18O2
- 2,2-Dimethyl-1-(9H-xanthen-9-yl)propan-1-one137144-20-8C18H18O2
- 4-Methyl-2,2-diphenylpent-4-enoic acid25209-35-2C18H18O2
- (2E)-3-(4-Ethoxyphenyl)-1-(3-methylphenyl)prop-2-en-1-one1322900-47-9C18H18O2
- 4-Benzyloxy-5,6,7,8-tetrahydronaphthalene-1-carboxaldehyde475481-60-8C18H18O2
- (2E)-1-(4-Ethylphenyl)-3-(2-methoxyphenyl)prop-2-en-1-one1175880-73-5C18H18O2
- (2E)-3-(2-Ethoxyphenyl)-1-(3-methylphenyl)prop-2-en-1-one1322663-61-5C18H18O2
- 1-Phenylethyl 4-phenylbut-3-enoate63158-20-3C18H18O2
- (4S,6R)-6-(4-Methylphenyl)-4-phenyloxan-2-one189443-67-2C18H18O2
- Ethyl (1S,2S)-2-(4-Biphenylyl)cyclopropanecarboxylate1052651-08-7C18H18O2
- 1H-Indene, 2,3-dihydro-1-(methoxymethylene)-7-(phenylmethoxy)-, (E)-125494-85-1C18H18O2
- 1,4-Ethanoanthracene, 1,4-dihydro-9,10-dimethoxy-75102-20-4C18H18O2
- 1-Propanone, 1,1'-(1,2-dihydro-3,6-acenaphthylenediyl)bis-55720-23-5C18H18O2
- [(15R,16R)-16-(Hydroxymethyl)-15-tetracyclo[6.6.2.02,7.09,14]hexadeca-2,4,6,9,11,13-hexaenyl]methanol5445-55-6C18H18O2
- 8-Methoxy-3a-methyl-3a,4,5,10-tetrahydrocyclopenta[a]fluoren-3(2H)-one14805-08-4C18H18O2
- 3-Methoxy-11,12,13,14,15,17-hexahydrocyclopenta[a]phenanthren-16-one28527-75-5C18H18O2
- 1-(2-Hydroxyphenyl)-3-(4-isopropylphenyl)-prop-2-EN-1-one108440-14-8C18H18O2
- (Z)-2-Hydroxy-3-phenyl-1-(2,4,6-trimethylphenyl)prop-2-en-1-one5666-00-2C18H18O2
- (E)-1-(3,4-Dimethylphenyl)-3-(3-methoxyphenyl)prop-2-en-1-one850476-76-5C18H18O2
- (2E)-1-(3,4-Dimethylphenyl)-3-(4-methoxyphenyl)prop-2-en-1-one1801145-86-7C18H18O2
- (2E)-1-(3,4-Dimethylphenyl)-3-(2-methoxyphenyl)prop-2-en-1-one1181695-34-0C18H18O2
- 1,3-Propanediol, 2-(9-anthracenylmethyl)-58353-41-6C18H18O2
- 1,2-Bis(2,6-dimethylphenyl)ethane-1,2-dione1225-22-5C18H18O2
- 1,6-Diphenyl-2,5-hexanedione54276-99-2C18H18O2
- 2,2'-Bis[(prop-2-en-1-yl)oxy]-1,1'-biphenyl73429-23-9C18H18O2
- Ethyl 3-(9H-fluoren-9-yl)propanoate90033-35-5C18H18O2
- Ethyl 4,4-diphenylbut-2-enoate97634-46-3C18H18O2
- 2-tert-Butylanthracene-9,10-diol64487-90-7C18H18O2
- Methyl 2-methyl-4,4-diphenylbut-3-enoate59158-97-3C18H18O2
- 3-Phenyl-1-[(propan-2-yl)oxy]-1H-2-benzopyran401901-68-6C18H18O2
- Phenol, 4,4a(2)-[1-cyclohexen-1,2-ylene]di-873394-44-6C18H18O2
- (2E)-3-(4-Ethylphenyl)-1-(4-methoxyphenyl)prop-2-en-1-one1181800-69-0C18H18O2
- 4-(4-(Benzyloxy)phenyl)-2-methylbut-3-yn-2-ol152915-78-1C18H18O2
- 5-(Benzyloxy)-2-(hydroxymethyl)-3,4-dihydronaphthalene475086-73-8C18H18O2
- 2-(4'-(tert-Butyl)-[1,1'-biphenyl]-4-yl)-2-oxoacetaldehyde1177215-29-0C18H18O2
- (2E)-1-(4-Ethylphenyl)-3-(3-methoxyphenyl)prop-2-en-1-one1176627-16-9C18H18O2
- Methyl 6-phenyl-1,2,3,4-tetrahydronaphthalene-2-carboxylate1289562-67-9C18H18O2
- 1,1'-[(1Z,3E)-Buta-1,3-diene-1,4-diyl]bis(4-methoxybenzene)C18H18O2
- 1,4-Bis((5-methylfuran-2-yl)methyl)benzene114527-13-8C18H18O2
- 6-(Benzyloxy)-2,2-dimethyl-2,3-dihydroinden-1-one1187198-36-2C18H18O2
- Ethyl 2-(9,10-dihydrophenanthren-2-yl)acetate1423702-41-3C18H18O2
- 7-Methoxy-1-(4-methoxyphenyl)-1,2-dihydronaphthalene156943-84-9C18H18O2
- (2E)-1-(4-Ethoxyphenyl)-3-(2-methylphenyl)prop-2-en-1-one1354942-25-8C18H18O2
- (2E)-1-(4-Ethoxyphenyl)-3-(3-methylphenyl)prop-2-en-1-one1449399-88-5C18H18O2
- (2E)-3-(4-Ethoxyphenyl)-1-(2-methylphenyl)prop-2-en-1-one1354941-62-0C18H18O2
- (2E)-3-(2-Ethoxyphenyl)-1-(2-methylphenyl)prop-2-en-1-one1354941-59-5C18H18O2
- 2-[4-(Benzyloxy)phenyl]cyclopentanone1391035-58-7C18H18O2
- 3-Methoxygona-1(10),2,4,8,13-pentaen-17-one21070-86-0C18H18O2
- (5s,6r)-5,6,8,9,10,11-Hexahydrobenzo(b)phenanthrene-5,6-diol94850-02-9C18H18O2
- [(15S,16S)-16-(Hydroxymethyl)-15-tetracyclo[6.6.2.02,7.09,14]hexadeca-2,4,6,9,11,13-hexaenyl]methanolC18H18O2
- 2,3-Dihydrospiro(4H-benzo[g]chromene-2,1'-cyclohexane)-4-one445228-78-4C18H18O2
- (2,6-Dimethylphenyl) 3-(4-methylphenyl)prop-2-enoate6986-85-2C18H18O2
- [1,1'-Biphenyl]-4-yl cyclopentanecarboxylate791831-02-2C18H18O2
- Tricyclo(8.2.2.2(4,7))hexadeca-hexaene-5-carboxylic acid ME ester10029-01-3C18H18O2
- (2E)-1-(2,4-Dimethylphenyl)-3-(4-methoxyphenyl)prop-2-en-1-one71994-19-9C18H18O2
- (2E)-1-(2,4-Dimethylphenyl)-3-(3-methoxyphenyl)prop-2-en-1-one926537-15-7C18H18O2
- (2E)-1-(2,4-Dimethylphenyl)-3-(2-methoxyphenyl)prop-2-en-1-one1287195-22-5C18H18O2
- [1-(4-Methoxyphenyl)-4-methoxybenzylidene]cyclopropane28228-81-1C18H18O2
- 2,5-Hexanedione, 3,3-diphenyl-583887-48-3C18H18O2
- 1(2H)-Naphthalenone, 3,4-dihydro-3-(4-methoxyphenyl)-4-methyl-61696-83-1C18H18O2
- 1H-Inden-1-one, 2,3-dihydro-2-[(4-methoxyphenyl)methyl]-3-methyl-61696-84-2C18H18O2
- 1,3-Diphenyl-2-propylpropane-1,3-dione59875-95-5C18H18O2
- 2,7-Dimethoxy-4,5,9,10-tetrahydropyrene19254-83-2C18H18O2
- Ethyl 2-methyl-3,3-diphenylprop-2-enoate65127-37-9C18H18O2
- 9-Butyl-9H-fluorene-9-carboxylic acid24539-63-7C18H18O2
- (2E)-3-(4-Ethylphenyl)-1-(3-methoxyphenyl)prop-2-en-1-one1354941-89-1C18H18O2
- (2E)-3-(4-Ethylphenyl)-1-(2-methoxyphenyl)prop-2-en-1-one1181679-08-2C18H18O2
- {3-Ethenyl-4-[(propan-2-yl)oxy]phenyl}(phenyl)methanone854055-50-8C18H18O2
- 2-(5,6-Dimethyl-1-benzofuran-3-yl)-4,5-dimethylphenol61551-55-1C18H18O2
Frequently asked questions
What is the molar mass of C18H18O2?
The molar mass of C18H18O2 is 266.34 g/mol, calculated from standard atomic weights for 18 carbon atoms, 18 hydrogen atoms and 2 oxygen atoms. The monoisotopic mass is 272.1683 Da.
How many compounds have the formula C18H18O2?
CompoundList lists 292 compounds with the molecular formula C18H18O2, including 3-Hydroxy-3,4-diphenylcyclohexan-1-one, 4,4'-(1,2-Ethanediylidene)-bis(2,6-dimethyl-2,5-cyclohexadien-1-one), (2E)-1-(4-Ethylphenyl)-3-(4-methoxyphenyl)prop-2-en-1-one. Compounds that share a formula are isomers. They contain the same atoms arranged differently, so their properties, uses and prices can be very different.
What is the degree of unsaturation of C18H18O2?
C18H18O2 has a degree of unsaturation of 10. That is the total number of rings and pi bonds (a double bond counts as one, a triple bond as two) in any structure with this formula.