Molecular formula
C21H16O3
68 compounds have this formula on CompoundList.
- Molar mass
- 316.36g/mol
- Monoisotopic mass
- 318.1225Da
- Atoms
- 40
- Elements
- 3
- Rings plus double bonds
- 14
The formula C21H16O3 describes a molecule made of 21 carbon atoms, 16 hydrogen atoms and 3 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 × 2179.73%12.011 × 21 = 252.231 g/mol
- H Hydrogen × 165.10%1.008 × 16 = 16.128 g/mol
- O Oxygen × 315.17%15.999 × 3 = 47.997 g/mol
Look up another formula
Compounds with the formula C21H16O3
Isomers we list, best known first. Open one to see its structure, properties, safety data and suppliers.
Showing 1 to 68 of 68 compounds
![9-(4-Methylphenyl)-2,3-dihydrocyclopenta[c]furo[3,2-g]chromen-4(1H)-one chemical structure, C21H16O3, CAS 370584-85-3](/s/QFCHMLTUURCHOZ-UHFFFAOYSA-N.svg)
9-(4-Methylphenyl)-2,3-dihydrocyclopenta[c]furo[3,2-g]chromen-4(1H)-one
CAS 370584-85-3C21H16O3
DL-Benzoin benzoate
CAS 1459-20-7C21H16O3
![10-Phenyl-1,2,3,4-tetrahydro-5H-benzo[c]furo[3,2-g]chromen-5-one chemical structure, C21H16O3, CAS 374702-62-2](/s/PQMCOYZAEROLIX-UHFFFAOYSA-N.svg)
10-Phenyl-1,2,3,4-tetrahydro-5H-benzo[c]furo[3,2-g]chromen-5-one
CAS 374702-62-2C21H16O3
![6-Methyl-9-phenyl-2,3-dihydrocyclopenta[c]furo[3,2-g]chromen-4(1H)-one chemical structure, C21H16O3, CAS 374705-09-6](/s/RSLJNPHUPRVOMK-UHFFFAOYSA-N.svg)
6-Methyl-9-phenyl-2,3-dihydrocyclopenta[c]furo[3,2-g]chromen-4(1H)-one
CAS 374705-09-6C21H16O3
7,8-Dihydroxy-9,10-epoxy-8-methyl-7,8,9,10-tetrahydrobenzo(a)pyrene
CAS 89524-81-2C21H16O3
2-(2-Ethoxy-naphthalen-1-yl)-indan-1,3-dione
CAS 27533-85-3C21H16O3
(2-Benzoylphenyl)(2-methoxyphenyl)methanone
CAS 6315-78-2C21H16O3
Phenacyl 2-phenylbenzoate
CAS 305857-42-5C21H16O3
![2-Acetylphenyl [1,1'-biphenyl]-4-carboxylate chemical structure, C21H16O3, CAS 511516-64-6](/s/PJCWUBUQMIDGOD-UHFFFAOYSA-N.svg)
2-Acetylphenyl [1,1'-biphenyl]-4-carboxylate
CAS 511516-64-6C21H16O3
![4-(1-Benzofuran-2-yl)-6,7,8,9-tetrahydro-2H-benzo[g]chromen-2-one chemical structure, C21H16O3, CAS 637751-07-6](/s/ALCKOZWRORAWFC-UHFFFAOYSA-N.svg)
4-(1-Benzofuran-2-yl)-6,7,8,9-tetrahydro-2H-benzo[g]chromen-2-one
CAS 637751-07-6C21H16O3
p-Phenylphenacyl benzoate
CAS 4347-61-9C21H16O3
2-Benzoyl-4-methylphenyl benzoate
CAS 344563-86-6C21H16O3
![8-Methyl-9-phenyl-2,3-dihydrocyclopenta[c]furo[3,2-g]chromen-4(1H)-one chemical structure, C21H16O3, CAS 374762-08-0](/s/URNLXYAITJMFDP-UHFFFAOYSA-N.svg)
8-Methyl-9-phenyl-2,3-dihydrocyclopenta[c]furo[3,2-g]chromen-4(1H)-one
CAS 374762-08-0C21H16O3
![4-Methyl-3-phenyl-9,10-dihydrocyclopenta[c]furo[2,3-f]chromen-7(8H)-one chemical structure, C21H16O3, CAS 374704-55-9](/s/BENKKFKZMFSIMS-UHFFFAOYSA-N.svg)
4-Methyl-3-phenyl-9,10-dihydrocyclopenta[c]furo[2,3-f]chromen-7(8H)-one
CAS 374704-55-9C21H16O3
(2-Hydroxy-5-methyl-1,3-phenylene)bis(phenylmethanone)
CAS 77347-19-4C21H16O3
9-Methoxy-4,5-dihydroxy-4,5-dihydrobenzo(a)pyrene
CAS 87771-55-9C21H16O3
![4-Phenyl-6,7,8,9-tetrahydro-2H-[1]benzofuro[3,2-g]chromen-2-one chemical structure, C21H16O3, CAS 345625-70-9](/s/NJYFGAXQBMEVOF-UHFFFAOYSA-N.svg)
4-Phenyl-6,7,8,9-tetrahydro-2H-[1]benzofuro[3,2-g]chromen-2-one
CAS 345625-70-9C21H16O3
9,10-Dihydroxy-9,10-dihydro-3-methylcholanthrene-2-one
CAS 127861-40-9C21H16O3
3-(4-Methoxyphenyl)-2-phenyl-1-benzofuran-6-ol
CAS 25433-74-3C21H16O3
Glutathione synthesis-IN-1
CAS 2632968-72-8C21H16O3
![3-[(3-Methylphenyl)methoxy]benzo[c]chromen-6-one chemical structure, C21H16O3, CAS 6146-89-0](/s/TYZWHFDNXOSEBL-UHFFFAOYSA-N.svg)
3-[(3-Methylphenyl)methoxy]benzo[c]chromen-6-one
CAS 6146-89-0C21H16O3
(9H-Fluoren-9-yl)methyl phenyl carbonate
CAS 88743-99-1C21H16O3
7-Methoxy-5,6-diphenyl-1-benzofuran-4-ol
CAS 120255-00-7C21H16O3
Benzyl 4-(phenylcarbonyl)benzoate
CAS 354991-12-1C21H16O3
- 4,7-Diphenyl-3a,4,7,7a-tetrahydro-4,7-methano-2-benzofuran-1,3-dione6942-67-2C21H16O3
- 4-Methyl-3-phenylmethoxybenzo[c]chromen-6-one302551-60-6C21H16O3
- 4-Benzoylphenyl 3-methylbenzoate301208-65-1C21H16O3
- Benz(a)anthracene-12-ol, 3-methoxy-, acetate66240-12-8C21H16O3
- 10-Hydroxy-10-(4-methoxyphenyl)anthracen-9-one57028-32-7C21H16O3
- 2-(2-Hydroxyphenyl)-1,3-diphenylpropane-1,3-dione6274-70-0C21H16O3
- 8,8-Diphenyl-3a,4,7,7a-tetrahydro-4,7-methano-2-benzofuran-1,3-dione71516-80-8C21H16O3
- 4H-1-Benzopyran-4-one, 2,3-dihydro-6-methoxy-3-(2-naphthalenylmethylene)-, (E)-130688-91-4C21H16O3
- 1-[2-(4-Methoxynaphthalen-1-yl)-1-benzofuran-3-yl]ethan-1-one61639-28-9C21H16O3
- 2-(Dibenzo[b,d]furan-2-yloxy)-1-(p-tolyl)ethanone51358-10-2C21H16O3
- Benzoic acid 4-[2-(3-hydroxy-phenyl)-vinyl]-phenyl ester1171921-36-0C21H16O3
- 7-Hydroxy-7,8,9,10-tetrahydrobenzo[pqr]tetraphene-10-carboxylic acid86803-28-3C21H16O3
- 10-Hydroxy-10-(2-methoxyphenyl)anthracen-9-one6340-06-3C21H16O3
- 10-Hydroxy-2-methoxy-10-phenylanthracen-9-one7477-19-2C21H16O3
- 10-Hydroxy-1-methoxy-10-phenyl-anthracen-9-one7470-95-3C21H16O3
- 4-(4-Benzoylbenzyloxy)benzaldehyde172931-96-3C21H16O3
- 2',3'-Dihydro-7-methoxy-spiro[isobenzofuran-1(3H),1'-[1H]phenalen]-3-one1391052-83-7C21H16O3
- 4-Phenoxychalcone oxide86711-50-4C21H16O3
- 2,3,3-Triphenyloxirane-2-carboxylic acid7312-44-9C21H16O3
- 2,5,5-Triphenyl-1,3-dioxolan-4-one19962-66-4C21H16O3
- Naphthalen-1-ylmethyl 2H-chromene-3-carboxylate871262-64-5C21H16O3
- Methyl 2-methoxychrysene-5-carboxylate87901-86-8C21H16O3
- Methyl 8-methoxychrysene-5-carboxylate87901-84-6C21H16O3
- (4-Methoxyphenyl)(9H-xanthen-9-yl)methanone87712-61-6C21H16O3
- 9-Benzyl-9H-xanthene-9-carboxylic acid2376634-13-6C21H16O3
- Benzo(10,11)chryseno(3,4-b)oxirene-7,8-diol, 7,8,8a,9a-tetrahydro-7-methyl-85191-60-2C21H16O3
- Benzo(a)pyrene-9,10-diol, 9,10-dihydro-7-(hydroxymethyl)-, Trans-79418-88-5C21H16O3
- Spiro(1H-indene-1,3'(1'H)-naphtho(1,2-c)furan)-1'-one-2-d, 2,3-dihydro-2-d-7'-methoxy-111238-12-1C21H16O3
- 2,8-Dimethoxy-9-phenyl-3H-cyclopenta[A]naphthalen-3-one140242-23-5C21H16O3
- 3-(2-Hydroxy-5-methylphenyl)-3-phenylisobenzofuran-1(3H)-one141034-37-9C21H16O3
- 1-[(2-Hydroxynaphthalen-1-yl)methyl]naphthalene-2,7-diol827022-19-5C21H16O3
- 1-(3-Phenylacryloyl)naphthalen-2-yl acetate76339-58-7C21H16O3
- 3-(4-Methylphenoxy)-3-phenyl-1(3H)-isobenzofuranone62930-13-6C21H16O3
- Methyl 2'-benzoyl[1,1'-biphenyl]-4-carboxylate684215-41-6C21H16O3
- 2-(4-Propylphenyl)naphtho[2,3-b]furan-4,9-dione62452-66-8C21H16O3
- 6-Methyl-3,3-diphenyl-1-oxaspiro[3.5]nona-5,8-diene-2,7-dione67678-31-3C21H16O3
- Methyl 10-methoxychrysene-5-carboxylate87901-85-7C21H16O3
- 5,12-Dimethoxynaphtho[2,3-A]azulene-11-carbaldehyde110318-81-5C21H16O3
- Benzyl 9-hydroxyfluorene-9-carboxylate10384-51-7C21H16O3
- 3-([1,1'-Biphenyl]-4-yl)-3-methoxy-2-benzofuran-1(3H)-one92688-35-2C21H16O3
- 5-Benzofuranol, 2-[2-(phenylmethoxy)phenyl]-1448962-43-3C21H16O3
- 2-Methoxyphenyl 9H-fluorene-9-carboxylate2004-51-5C21H16O3
- Benzyl 2'-formyl-[1,1'-biphenyl]-2-carboxylate916904-26-2C21H16O3
- 5'-Methoxy-[1,1':2',1''-terphenyl]-2,6-dicarbaldehyde2917694-20-1C21H16O3
Frequently asked questions
What is the molar mass of C21H16O3?
The molar mass of C21H16O3 is 316.36 g/mol, calculated from standard atomic weights for 21 carbon atoms, 16 hydrogen atoms and 3 oxygen atoms. The monoisotopic mass is 318.1225 Da.
How many compounds have the formula C21H16O3?
CompoundList lists 68 compounds with the molecular formula C21H16O3, including 9-(4-Methylphenyl)-2,3-dihydrocyclopenta[c]furo[3,2-g]chromen-4(1H)-one, DL-Benzoin benzoate, 10-Phenyl-1,2,3,4-tetrahydro-5H-benzo[c]furo[3,2-g]chromen-5-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 C21H16O3?
C21H16O3 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.