Molecular formula

C₁₈H₁₈O

128 compounds have this formula on CompoundList.

Molar mass: 250.34g/mol
Monoisotopic mass: 250.1358Da
Atoms: 37
Elements: 3
Rings plus double bonds: 10

The formula C18H18O describes a molecule made of 18 carbon atoms, 18 hydrogen atoms and 1 oxygen atom. 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 × 1886.36%
12.011 × 18 = 216.198 g/mol
H Hydrogen × 187.25%
1.008 × 18 = 18.144 g/mol
O Oxygen × 16.39%
15.999 × 1 = 15.999 g/mol

Look up another formula

Compounds with the formula C18H18O

Isomers we list, best known first. Open one to see its structure, properties, safety data and suppliers.

Showing 101 to 128 of 128 compounds

6,6-Diphenylhex-5-enal

CAS 167646-75-5C₁₈H₁₈O

1,2-Diphenylhex-1-en-3-one

CAS 61798-66-1C₁₈H₁₈O

2-Methyl-7-(naphthalen-1-yl)hepta-1,6-dien-3-one

CAS 61619-03-2C₁₈H₁₈O

1-(3,3-Dimethyl-2-phenylcycloprop-1-en-1-yl)-4-methoxybenzene

CAS 61195-63-9C₁₈H₁₈O

1-[2-(Dec-3-ene-1,5-diyn-1-yl)phenyl]ethan-1-one

CAS 823228-01-9C₁₈H₁₈O

3-(3,4-Dimethylphenyl)-1-(4-methylphenyl)prop-2-en-1-one

CAS 819792-68-2C₁₈H₁₈O

5-(4-Methylphenyl)-4-phenylpenta-2,4-dien-1-ol

CAS 921195-46-2C₁₈H₁₈O

2-Methyl-3-[(4-methylphenyl)methyl]-2H-1-benzopyran

CAS 919355-99-0C₁₈H₁₈O

2-Methyl-1,4-diphenylpent-1-en-3-one

CAS 917906-05-9C₁₈H₁₈O

(3-Cyclopentylphenyl)(phenyl)methanone

CAS 461382-78-5C₁₈H₁₈O

3-[3-(2,3-Dimethylphenyl)phenyl]cyclobutan-1-one

CAS 1955518-45-2C₁₈H₁₈O

4-[3-(Cyclobutylmethyl)phenyl]benzaldehyde

CAS 2138349-47-8C₁₈H₁₈O

1-(9H-Fluoren-9-yl)cyclopentanol

CAS 101789-17-7C₁₈H₁₈O

[1,1'-Biphenyl]-2-yl(cyclopentyl)methanone

CAS 2173111-75-4C₁₈H₁₈O

3-(Cyclopropylmethoxy)-3'-vinyl-1,1'-biphenyl

CAS 2990092-61-8C₁₈H₁₈O

1-[1-(Diphenylmethyl)cyclopropyl]ethan-1-one

CAS 2228563-16-2C₁₈H₁₈O

1-(Benzyloxy)-3-(2-methylbut-3-yn-2-yl)benzene

CAS 2228398-33-0C₁₈H₁₈O

1-(Benzyloxy)-4-(2-methylbut-3-yn-2-yl)benzene

CAS 2228974-62-5C₁₈H₁₈O

1-(Benzyloxy)-2-(2-methylbut-3-yn-2-yl)benzene

CAS 2228443-23-8C₁₈H₁₈O

2-(Cyclopropylmethoxy)-3-vinyl-1,1'-biphenyl

CAS 3078437-49-4C₁₈H₁₈O

1-(Benzyloxy)-2-(1-cyclopropylvinyl)benzene

CAS 2490299-87-9C₁₈H₁₈O

1-(Benzyloxy)-4-(1-cyclopropylvinyl)benzene

CAS 2374777-10-1C₁₈H₁₈O

[1,1'-Biphenyl]-3-yl(cyclopentyl)methanone

CAS 3002487-44-4C₁₈H₁₈O

1-(1-Cyclopenten-1-yl)-4-(phenylmethoxy)benzene

CAS 103254-93-9C₁₈H₁₈O

Frequently asked questions

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What is the molar mass of C18H18O?

The molar mass of C18H18O is 250.34 g/mol, calculated from standard atomic weights for 18 carbon atoms, 18 hydrogen atoms and 1 oxygen atom. The monoisotopic mass is 250.1358 Da.

How many compounds have the formula C18H18O?

CompoundList lists 128 compounds with the molecular formula C18H18O, including 6,6-Diphenylhex-5-enal, 1,2-Diphenylhex-1-en-3-one, 2-Methyl-7-(naphthalen-1-yl)hepta-1,6-dien-3-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 C18H18O?

C18H18O 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.