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Molecular formula

C21H28O

26 compounds have this formula on CompoundList.

Molar mass
296.45g/mol
Monoisotopic mass
296.2140Da
Atoms
50
Elements
3
Rings plus double bonds
8

The formula C21H28O describes a molecule made of 21 carbon atoms, 28 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 × 2185.08%
    12.011 × 21 = 252.231 g/mol
  • H Hydrogen × 289.52%
    1.008 × 28 = 28.224 g/mol
  • O Oxygen × 15.40%
    15.999 × 1 = 15.999 g/mol
Look up another formula

Compounds with the formula C21H28O

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

Showing 1 to 26 of 26 compounds

Phenol, 2,6-bis(1,1-dimethylethyl)-4-(phenylmethyl)- chemical structure, C21H28O, CAS 4973-27-7
Phenol, 2,6-bis(1,1-dimethylethyl)-4-(phenylmethyl)-
CAS 4973-27-7C21H28O
11-Methylenelynestrenol chemical structure, C21H28O, CAS 54024-12-3
11-Methylenelynestrenol
CAS 54024-12-3C21H28O
Benzene, 1-(phenylmethoxy)-4-(1,1,3,3-tetramethylbutyl)- chemical structure, C21H28O, CAS 110875-85-9
Benzene, 1-(phenylmethoxy)-4-(1,1,3,3-tetramethylbutyl)-
CAS 110875-85-9C21H28O
Phenol, 2,4-bis(1,1-dimethylethyl)-6-(phenylmethyl)- chemical structure, C21H28O, CAS 3286-98-4
Phenol, 2,4-bis(1,1-dimethylethyl)-6-(phenylmethyl)-
CAS 3286-98-4C21H28O
10,20-Methanoretinal chemical structure, C21H28O, CAS 128434-80-0
10,20-Methanoretinal
CAS 128434-80-0C21H28O
Itruvone chemical structure, C21H28O, CAS 21321-89-1
Itruvone
CAS 21321-89-1C21H28O
3,5-Di-tert-butyl-4'-methyl-4-biphenylol chemical structure, C21H28O, CAS 6257-38-1
3,5-Di-tert-butyl-4'-methyl-4-biphenylol
CAS 6257-38-1C21H28O
Bis(4-(tert-butyl)phenyl)methanol chemical structure, C21H28O, CAS 16607-60-6
Bis(4-(tert-butyl)phenyl)methanol
CAS 16607-60-6C21H28O
4-Butoxy-4'-pentyl-1,1'-biphenyl chemical structure, C21H28O, CAS 88607-04-9
4-Butoxy-4'-pentyl-1,1'-biphenyl
CAS 88607-04-9C21H28O
[1,1'-Biphenyl]-4-ol, 3,5-bis(1,1-dimethylethyl)-2'-methyl- chemical structure, C21H28O, CAS 6152-15-4
[1,1'-Biphenyl]-4-ol, 3,5-bis(1,1-dimethylethyl)-2'-methyl-
CAS 6152-15-4C21H28O
3,5-Bis(1,1-dimethylethyl)-alpha-phenylbenzenemethanol chemical structure, C21H28O, CAS 111439-56-6
3,5-Bis(1,1-dimethylethyl)-alpha-phenylbenzenemethanol
CAS 111439-56-6C21H28O
(17Z)-3-Methoxy-19-norpregna-1,3,5(10),17(20)-tetraene chemical structure, C21H28O, CAS 4736-61-2
(17Z)-3-Methoxy-19-norpregna-1,3,5(10),17(20)-tetraene
CAS 4736-61-2C21H28O
Benzene, 1-(2-ethylbutyl)-4-(3-phenylpropoxy)- chemical structure, C21H28O, CAS 125796-87-4
Benzene, 1-(2-ethylbutyl)-4-(3-phenylpropoxy)-
CAS 125796-87-4C21H28O
Benzene, 1-ethyl-4-((4-(2-ethylbutyl)phenoxy)methyl)- chemical structure, C21H28O, CAS 125796-70-5
Benzene, 1-ethyl-4-((4-(2-ethylbutyl)phenoxy)methyl)-
CAS 125796-70-5C21H28O
2,5-Cyclohexadien-1-one, 2,6-bis(1,1-dimethylethyl)-4-methyl-4-phenyl- chemical structure, C21H28O, CAS 120186-70-1
2,5-Cyclohexadien-1-one, 2,6-bis(1,1-dimethylethyl)-4-methyl-4-phenyl-
CAS 120186-70-1C21H28O
[1,1'-Biphenyl]-4-ol, 3,5-bis(1,1-dimethylethyl)-3'-methyl- chemical structure, C21H28O, CAS 6257-37-0
[1,1'-Biphenyl]-4-ol, 3,5-bis(1,1-dimethylethyl)-3'-methyl-
CAS 6257-37-0C21H28O
3-(4-Phenylcyclohexyl)-6-propylcyclohex-2-en-1-one chemical structure, C21H28O, CAS 200133-49-9
3-(4-Phenylcyclohexyl)-6-propylcyclohex-2-en-1-one
CAS 200133-49-9C21H28O
1-(4'-Butyl-[1,1'-biphenyl]-4-yl)-2-methylbutan-1-ol chemical structure, C21H28O, CAS 3002470-19-8
1-(4'-Butyl-[1,1'-biphenyl]-4-yl)-2-methylbutan-1-ol
CAS 3002470-19-8C21H28O
1-(4'-Butyl-[1,1'-biphenyl]-4-yl)-2,2-dimethylpropan-1-ol chemical structure, C21H28O, CAS 3002458-04-7
1-(4'-Butyl-[1,1'-biphenyl]-4-yl)-2,2-dimethylpropan-1-ol
CAS 3002458-04-7C21H28O
1-(6-Methylnaphthalen-2-yl)decan-1-one chemical structure, C21H28O, CAS 87969-69-5
1-(6-Methylnaphthalen-2-yl)decan-1-one
CAS 87969-69-5C21H28O
4-(2-Phenylpropan-2-yl)-2,6-di(propan-2-yl)phenol chemical structure, C21H28O, CAS 113278-14-1
4-(2-Phenylpropan-2-yl)-2,6-di(propan-2-yl)phenol
CAS 113278-14-1C21H28O
1-Cyclododecyl-3-phenylprop-2-yn-1-one chemical structure, C21H28O, CAS 918638-72-9
1-Cyclododecyl-3-phenylprop-2-yn-1-one
CAS 918638-72-9C21H28O
2-Nonyl-6-phenylphenol chemical structure, C21H28O, CAS 640771-71-7
2-Nonyl-6-phenylphenol
CAS 640771-71-7C21H28O
1-[(8S,9S,13S,14S,17S)-4,13-Dimethyl-6,7,8,9,11,12,14,15,16,17-decahydrocyclopenta[a]phenanthren-17-yl]ethanone chemical structure, C21H28O, CAS 796-24-7
1-[(8S,9S,13S,14S,17S)-4,13-Dimethyl-6,7,8,9,11,12,14,15,16,17-decahydrocyclopenta[a]phenanthren-17-yl]ethanone
CAS 796-24-7C21H28O

Frequently asked questions

What is the molar mass of C21H28O?

The molar mass of C21H28O is 296.45 g/mol, calculated from standard atomic weights for 21 carbon atoms, 28 hydrogen atoms and 1 oxygen atom. The monoisotopic mass is 296.2140 Da.

How many compounds have the formula C21H28O?

CompoundList lists 26 compounds with the molecular formula C21H28O, including Phenol, 2,6-bis(1,1-dimethylethyl)-4-(phenylmethyl)-, 11-Methylenelynestrenol, Benzene, 1-(phenylmethoxy)-4-(1,1,3,3-tetramethylbutyl)-. 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 C21H28O?

C21H28O has a degree of unsaturation of 8. 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.