Molecular formula

C₂₁H₂₆O

27 compounds have this formula on CompoundList.

Molar mass: 294.44g/mol
Monoisotopic mass: 294.1984Da
Atoms: 48
Elements: 3
Rings plus double bonds: 9

The formula C21H26O describes a molecule made of 21 carbon atoms, 26 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 × 2185.67%
12.011 × 21 = 252.231 g/mol
H Hydrogen × 268.90%
1.008 × 26 = 26.208 g/mol
O Oxygen × 15.43%
15.999 × 1 = 15.999 g/mol

Look up another formula

Compounds with the formula C21H26O

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

Showing 1 to 27 of 27 compounds

2,5-Cyclohexadien-1-one, 2,6-bis(1,1-dimethylethyl)-4-(phenylmethylene)-

CAS 7078-98-0C₂₁H₂₆O

Bis(4-tert-butylphenyl)methanone

CAS 15796-82-4C₂₁H₂₆O

Bis(2,3,5,6-tetramethylphenyl)methanone

CAS 67075-68-7C₂₁H₂₆O

4-n-Butyl-4'-tert-butylbenzophenone

CAS 95282-55-6C₂₁H₂₆O

1-Propanone, 1,3-bis(2,4,6-trimethylphenyl)-

CAS 102471-92-1C₂₁H₂₆O

2-(8-Phenyloctyl)benzaldehyde

CAS 96964-45-3C₂₁H₂₆O

4-N-Octylbenzophenone

CAS 64357-43-3C₂₁H₂₆O

Nonanophenone, 2-phenyl-

CAS 52072-38-5C₂₁H₂₆O

1,1,3,3-Tetramethyl-6-(1-phenylethyl)indan-5-ol

CAS 93892-38-7C₂₁H₂₆O

3-Pentanone, 2,4-dimethyl-2,4-bis(4-methylphenyl)-

CAS 824984-64-7C₂₁H₂₆O

1-Propen-2-ol, 1,1-bis(2,4,6-trimethylphenyl)-

CAS 89959-15-9C₂₁H₂₆O

(3,5-Di-tert-butylphenyl)(phenyl)methanone

CAS 3002429-16-2C₂₁H₂₆O

(4aR,4bS,10bR)-4,4a,4b,5,6,10b,11,12-Octahydro-4a,7,8-trimethyl-2(3H)-chrysenone

CAS 104098-81-9C₂₁H₂₆O

4-[4-(4-Propylphenyl)phenyl]cyclohexan-1-ol

CAS 194731-48-1C₂₁H₂₆O

3,3-Bis(4-methylbenzyl)pent-4-en-1-ol

CAS 1384881-62-2C₂₁H₂₆O

3-Cyclohexyl-1,1-diphenylpropan-1-ol

CAS 55766-18-2C₂₁H₂₆O

[1,1'-Biphenyl]-4-carboxaldehyde, 4'-octyl-

CAS 93972-09-9C₂₁H₂₆O

Bis(2,6-diethylphenyl)methanone

CAS 22679-46-5C₂₁H₂₆O

1-[2-(3,3-Dimethylbut-1-yn-1-yl)phenyl]-3,3-dimethylhept-5-yn-1-one

CAS 1236191-15-3C₂₁H₂₆O

Benzene, 1-[(1R)-1-cyclopropylethyl]-3-(1-methylethyl)-2-(phenylmethoxy)-

CAS 1888331-69-8C₂₁H₂₆O

3',5'-Di-tert-butyl-[1,1'-biphenyl]-2-carbaldehyde

CAS 1870828-76-4C₂₁H₂₆O

(2,4-Di-tert-butylphenyl)(phenyl)methanone

CAS 111959-99-0C₂₁H₂₆O

2-[2,6-Di(propan-2-yl)phenyl]-1-phenylpropan-1-one

CAS 960591-77-9C₂₁H₂₆O

4-(trans-4-(4-Propylphenyl)cyclohexyl)phenol

CAS 872532-27-9C₂₁H₂₆O

Frequently asked questions

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What is the molar mass of C21H26O?

The molar mass of C21H26O is 294.44 g/mol, calculated from standard atomic weights for 21 carbon atoms, 26 hydrogen atoms and 1 oxygen atom. The monoisotopic mass is 294.1984 Da.

How many compounds have the formula C21H26O?

CompoundList lists 27 compounds with the molecular formula C21H26O, including 2,5-Cyclohexadien-1-one, 2,6-bis(1,1-dimethylethyl)-4-(phenylmethylene)-, Bis(4-tert-butylphenyl)methanone, Bis(2,3,5,6-tetramethylphenyl)methanone. 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 C21H26O?

C21H26O has a degree of unsaturation of 9. 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.