Molecular formula

C₂₁H₂₈O₂

125 compounds have this formula on CompoundList.

Molar mass: 312.45g/mol
Monoisotopic mass: 318.2466Da
Atoms: 51
Elements: 3
Rings plus double bonds: 8

The formula C21H28O2 describes a molecule made of 21 carbon atoms, 28 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 × 2180.73%
12.011 × 21 = 252.231 g/mol
H Hydrogen × 289.03%
1.008 × 28 = 28.224 g/mol
O Oxygen × 210.24%
15.999 × 2 = 31.998 g/mol

Look up another formula

Compounds with the formula C21H28O2

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

Showing 101 to 125 of 125 compounds

4,4'-(Nonane-1,1-diyl)diphenol

CAS 102445-18-1C₂₁H₂₈O₂

2,2'-(Pentane-1,1-diyl)bis(4,6-dimethylphenol)

CAS 133992-15-1C₂₁H₂₈O₂

1,1'-[Pentane-1,5-diylbis(oxy)]bis(3,5-dimethylbenzene)

CAS 139913-42-1C₂₁H₂₈O₂

2,2'-Methylenebis(5-butylphenol)

CAS 144645-40-9C₂₁H₂₈O₂

2-(5-Methyl-2-propan-2-ylphenyl)-5-pentylbenzene-1,3-diol

CAS 2488614-26-0C₂₁H₂₈O₂

2,2'-Methylenebis(3-tert-butylphenol)

CAS 142281-96-7C₂₁H₂₈O₂

4-(Benzyloxy)-2-(2,4,4-trimethylpentan-2-yl)phenol

CAS 54636-95-2C₂₁H₂₈O₂

Pimavanserin impurity 33

CAS 2212-44-4C₂₁H₂₈O₂

17-Hydroxy-13alpha-pregn-4-en-20-yn-3-one

CAS 17554-63-1C₂₁H₂₈O₂

Dydrogesterone impurity 33

CAS 16484-70-1C₂₁H₂₈O₂

4,4'-(Nonane-4,6-diyl)diphenol

CAS 6052-81-9C₂₁H₂₈O₂

2-Ethyl-1-(3-methyl-5-((3-methylbenZyl)oxy)phenyl)butan-1-ol

CAS 2969459-42-3C₂₁H₂₈O₂

2-Ethyl-1-(4'-isopropoxy-[1,1'-biphenyl]-4-yl)butan-1-ol

CAS 3002423-41-5C₂₁H₂₈O₂

1-(3,5-Dimethyl-2-((4-methylbenZyl)oxy)phenyl)-2,2-dimethylpropan-1-ol

CAS 3002528-93-7C₂₁H₂₈O₂

2-Ethyl-1-(2-methyl-4-((4-methylbenzyl)oxy)phenyl)butan-1-ol

CAS 3002483-72-6C₂₁H₂₈O₂

Pregna-4,7-diene-3,20-dione

C₂₁H₂₈O₂

4'-[(Nonan-2-yl)oxy][1,1'-biphenyl]-4-ol

CAS 823790-60-9C₂₁H₂₈O₂

1-Butoxy-4-[1-(4-methoxyphenyl)-2-methylpropyl]benzene

CAS 62897-52-3C₂₁H₂₈O₂

3,7-Dimethyloctyl naphthalene-2-carboxylate

CAS 94417-98-8C₂₁H₂₈O₂

3-Decylazulene-1-carboxylic acid

CAS 919299-82-4C₂₁H₂₈O₂

(8R,9S,10R,13S,14S)-3-Ethoxy-13-methyl-16-methylene-7,8,9,10,11,12,13,14,15,16-decahydro-1H-cyclopenta[a]phenanthren-17(2H)-one

CAS 4290-66-8C₂₁H₂₈O₂

1-(Ethoxy(4-vinylphenoxy)methyl)adamantane

CAS 1354844-96-4C₂₁H₂₈O₂

Cyclohexyl 3-(4-(tert-butyl)phenyl)bicyclo[1.1.0]butane-1-carboxylate

CAS 2989974-48-1C₂₁H₂₈O₂

Propyltrenbolone

CAS 856893-83-9C₂₁H₂₈O₂

1-(2-Methoxy-2-(4-vinylphenoxy)ethyl)adamantane
1428978-43-1C₂₁H₂₈O₂

Frequently asked questions

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What is the molar mass of C21H28O2?

The molar mass of C21H28O2 is 312.45 g/mol, calculated from standard atomic weights for 21 carbon atoms, 28 hydrogen atoms and 2 oxygen atoms. The monoisotopic mass is 318.2466 Da.

How many compounds have the formula C21H28O2?

CompoundList lists 125 compounds with the molecular formula C21H28O2, including 4,4'-(Nonane-1,1-diyl)diphenol, 2,2'-(Pentane-1,1-diyl)bis(4,6-dimethylphenol), 1,1'-[Pentane-1,5-diylbis(oxy)]bis(3,5-dimethylbenzene). 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 C21H28O2?

C21H28O2 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.