Molecular formula

C₂₁H₁₆

43 compounds have this formula on CompoundList.

Molar mass: 268.36g/mol
Monoisotopic mass: 268.1252Da
Atoms: 37
Elements: 2
Rings plus double bonds: 14

The formula C21H16 describes a molecule made of 21 carbon atoms and 16 hydrogen 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 × 2193.99%
12.011 × 21 = 252.231 g/mol
H Hydrogen × 166.01%
1.008 × 16 = 16.128 g/mol

Look up another formula

Compounds with the formula C21H16

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

Showing 1 to 43 of 43 compounds

3-Methylcholanthrene

CAS 56-49-5C₂₁H₁₆

9-Benzyl-anthracene

CAS 1498-71-1C₂₁H₁₆

1-Methyl-1,2-dihydrobenzo[j]aceanthrylene

CAS 63021-87-4C₂₁H₁₆

9H-Fluorene, 9-[(4-methylphenyl)methylene]-

CAS 2871-85-4C₂₁H₁₆

9-Methyl-10-phenylanthracene

CAS 13425-08-6C₂₁H₁₆

(2,3-Diphenyl-1-cyclopropen-1-yl)benzene

CAS 16510-49-9C₂₁H₁₆

Methylenedinaphthalene

CAS 28515-57-3C₂₁H₁₆

1,2'-Dinaphthylmethane

CAS 611-48-3C₂₁H₁₆

5,6-Cyclopenteno-1,2-benzanthracene

CAS 7099-43-6C₂₁H₁₆

6-Methylcholanthrene

CAS 29873-25-4C₂₁H₁₆

Benz(j)aceanthrylene, 1,2-dihydro-2-methyl-

CAS 13728-81-9C₂₁H₁₆

1,2-Diphenyl-1H-indene

CAS 18636-54-9C₂₁H₁₆

1,1-Diphenylprop-2-ynylbenzene

CAS 6104-51-4C₂₁H₁₆

(1,3-Diphenyl-2-propynyl)benzene

CAS 5467-43-6C₂₁H₁₆

6,7-Cyclopentano-5-methylchrysene

CAS 128941-62-8C₂₁H₁₆

2-Methyl-1,1'-binaphthalene

CAS 118018-45-4C₂₁H₁₆

Benzo(a)pyrene, 9,10-dihydro-7-methyl-

CAS 7499-32-3C₂₁H₁₆

2,3-Diphenyl-1H-indene

CAS 5324-00-5C₂₁H₁₆

4-Methylcholanthrene

CAS 17012-89-4C₂₁H₁₆

9-Benzylphenanthrene

CAS 605-05-0C₂₁H₁₆

1H-Indene, 1,3-diphenyl-

CAS 4467-88-3C₂₁H₁₆

9-(4-Methylphenyl)anthracene

CAS 23674-14-8C₂₁H₁₆

9,10(1',2')-Benzenoanthracene, 9,10-dihydro-9-methyl-

CAS 793-39-5C₂₁H₁₆

Cholanthrene, 5-methyl-

CAS 63041-78-1C₂₁H₁₆

Frequently asked questions

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What is the molar mass of C21H16?

The molar mass of C21H16 is 268.36 g/mol, calculated from standard atomic weights for 21 carbon atoms and 16 hydrogen atoms. The monoisotopic mass is 268.1252 Da.

How many compounds have the formula C21H16?

CompoundList lists 43 compounds with the molecular formula C21H16, including 3-Methylcholanthrene, 9-Benzyl-anthracene, 1-Methyl-1,2-dihydrobenzo[j]aceanthrylene. 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 C21H16?

C21H16 has a degree of unsaturation of 14. 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.