C21H16O4
58 compounds have this formula on CompoundList.
- Molar mass
- 332.35g/mol
- Monoisotopic mass
- 332.1049Da
- Atoms
- 41
- Elements
- 3
- Rings plus double bonds
- 14
The formula C21H16O4 describes a molecule made of 21 carbon atoms, 16 hydrogen atoms and 4 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 × 2175.89%12.011 × 21 = 252.231 g/mol
- H Hydrogen × 164.85%1.008 × 16 = 16.128 g/mol
- O Oxygen × 419.26%15.999 × 4 = 63.996 g/mol
Compounds with the formula C21H16O4
Isomers we list, best known first. Open one to see its structure, properties, safety data and suppliers.
Showing 1 to 58 of 58 compounds
![3-[(4-Methoxyphenyl)methoxy]benzo[c]chromen-6-one chemical structure, C21H16O4, CAS 375838-69-0](/s/PEOPXQPKSGPAES-UHFFFAOYSA-N.svg)
![[4-[(Z)-3-(4-Methylphenyl)-3-oxoprop-1-enyl]phenyl] furan-2-carboxylate chemical structure, C21H16O4, CAS 331461-01-9](/s/SQTDGQOHRFSBJZ-JYRVWZFOSA-N.svg)
![4-Ethoxy-7-((E)-styryl)-furo[3,2-g]chromen-5-one chemical structure, C21H16O4, CAS 194346-61-7](/s/TZRUAYHMQMKKLT-CMDGGOBGSA-N.svg)
![4-(1-Benzofuran-2-yl)-6-[(2-methylprop-2-en-1-yl)oxy]-2H-chromen-2-one chemical structure, C21H16O4, CAS 898430-19-8](/s/WJVPAATZFXZXAM-UHFFFAOYSA-N.svg)
![9-(4-Methoxyphenyl)-2,3-dihydrocyclopenta[c]furo[3,2-g]chromen-4(1H)-one chemical structure, C21H16O4, CAS 374762-71-7](/s/AFBPCSXZKVOCAC-UHFFFAOYSA-N.svg)
![4-(7-Methoxybenzofuran-2-yl)-7,8-dihydrocyclopenta[g]chromen-2(6H)-one chemical structure, C21H16O4, CAS 858767-71-2](/s/DLRKVVOFDHMEHE-UHFFFAOYSA-N.svg)
![3-(3,4-Dimethoxyphenyl)benzo[f]chromen-1-one chemical structure, C21H16O4, CAS 136116-18-2](/s/HZACSJPHOPKIHC-UHFFFAOYSA-N.svg)
![9-(3-Methoxyphenyl)-2,3-dihydrocyclopenta[c]furo[3,2-g]chromen-4(1H)-one chemical structure, C21H16O4, CAS 500204-87-5](/s/UXAFUQQQFJCPMD-UHFFFAOYSA-N.svg)
![2-(3,4-Dimethoxyphenyl)benzo[f]chromen-3-one chemical structure, C21H16O4, CAS 113769-79-2](/s/RTHLUXXSEISSOY-UHFFFAOYSA-N.svg)
![5'-Methyl-[1,1':3',1''-terphenyl]-4,4''-dicarboxylic acid chemical structure, C21H16O4, CAS 1582811-97-9](/s/XTEFXDSIWNENNF-UHFFFAOYSA-N.svg)
![2'-Methyl-[1,1':4',1''-terphenyl]-4,4''-dicarboxylic acid chemical structure, C21H16O4, CAS 933982-49-1](/s/OPHZSEABTWHYKH-UHFFFAOYSA-N.svg)
![2-Benzoyl-3,5,9-trimethyl-7H-furo[3,2-g]chromen-7-one chemical structure, C21H16O4, CAS 312517-59-2](/s/DEZFKULOSALXLJ-UHFFFAOYSA-N.svg)
![3-[(2-Methoxyphenyl)methoxy]benzo[c]chromen-6-one chemical structure, C21H16O4, CAS 375833-82-2](/s/REMPOIUVBLBDMH-UHFFFAOYSA-N.svg)
- (Z)-6-(Benzyloxy)-2-((5-methylfuran-2-yl)methylene)benzofuran-3(2H)-one620548-62-1C21H16O4
- (Z)-2-(Furan-2-ylmethylene)-6-((2-methylbenzyl)oxy)benzofuran-3(2H)-one620548-66-5C21H16O4
- (Z)-2-(Furan-2-ylmethylene)-6-((4-methylbenzyl)oxy)benzofuran-3(2H)-one620548-90-5C21H16O4
- (Z)-3-Oxo-2-((E)-3-phenylallylidene)-2,3-dihydrobenzofuran-6-yl cyclopropanecarboxylate622800-04-8C21H16O4
- 3-[(3-Methoxyphenyl)methoxy]benzo[c]chromen-6-one374918-88-4C21H16O4
- 2-Acetoxy-3'-phenoxybenzophenone890099-37-3C21H16O4
- 2-Acetoxy-4'-phenoxybenzophenone890098-30-3C21H16O4
- [2-Oxo-2-(4-phenylphenyl)ethyl] 4-hydroxybenzoate4347-81-3C21H16O4
- 3-Acetoxy-3'-phenoxybenzophenone890099-73-7C21H16O4
- 3-Acetoxy-4'-phenoxybenzophenone890099-75-9C21H16O4
- 4-Acetoxy-3'-phenoxybenzophenone890099-58-8C21H16O4
- 4-Acetoxy-4'-phenoxybenzophenone890099-60-2C21H16O4
- 2-(Methoxycarbonyl)phenyl 4-phenylbenzoate817565-05-2C21H16O4
- 2-Pyren-1-ylpentanedioic acid86803-20-5C21H16O4
- [1-(Pyren-1-yl)ethyl]propanedioic acid6272-56-6C21H16O4
- 4-Hydroxy-8-methoxy-3-(1-naphthalenylmethyl)-2H-1-benzopyran-2-one2107-80-4C21H16O4
- Trifolirhizin, tetraacetate6896-09-9C21H16O4
- Benzoic acid, 4-[(2-benzoylphenoxy)methyl]-833484-93-8C21H16O4
- 2-[4-(Benzoyloxy)phenyl]-1-(4-hydroxyphenyl)ethanone151533-66-3C21H16O4
- 4'-(Benzyloxy)-3'-formyl[1,1'-biphenyl]-4-carboxylic acid893735-56-3C21H16O4
- 1,4-Diphenyl 2-methyl-1,4-benzenedicarboxylate40140-10-1C21H16O4
- Bis(2-ethynylphenyl) pentanedioate66096-91-1C21H16O4
- 5'-Methyl-[1,1':3',1"-terphenyl]-3,3"-dicarboxylic acid2451082-05-4C21H16O4
- (2-Benzo[1,3]dioxol-5-yl-phenyl)-(4-methoxyphenyl)-methanone878555-12-5C21H16O4
- 4'-(Benzyloxy)-3'-formyl[1,1'-biphenyl]-3-carboxylic acid893735-58-5C21H16O4
- 4-Ethoxy-7-(2-phenylethenyl)-5H-furo[3,2-g][1]benzopyran-5-one106751-85-3C21H16O4
- Methyl 2,2-diphenyl-2H-1,3-benzodioxole-4-carboxylate72553-33-4C21H16O4
- 2-[4-[(2-Oxocyclopentyl)carbonyl]phenyl]-4H-1-benzopyran-4-one55737-24-1C21H16O4
- 1-(1-Benzoyl-2-oxopropyl)-2-naphthalenecarboxylic acid54245-29-3C21H16O4
- 4-(1-Oxo-2,3-dihydro-1H-naphtho[2,1-b]pyran-3-yl)phenyl acetate62069-38-9C21H16O4
- 1-(Naphthalen-2-yl)-1,3-dioxo-3-phenylpropan-2-yl acetate60615-35-2C21H16O4
- 6,8-Dimethoxy-3-methyltetraphene-7,12-dione88165-39-3C21H16O4
- 9-Acetyl-4-methoxyfluoranthen-8-yl acetate88070-16-0C21H16O4
- 7,8-Dimethoxy-2-phenyl-4H-benzo[h]chromen-4-one1428646-20-1C21H16O4
Frequently asked questions
What is the molar mass of C21H16O4?
The molar mass of C21H16O4 is 332.35 g/mol, calculated from standard atomic weights for 21 carbon atoms, 16 hydrogen atoms and 4 oxygen atoms. The monoisotopic mass is 332.1049 Da.
How many compounds have the formula C21H16O4?
CompoundList lists 58 compounds with the molecular formula C21H16O4, including 3',4'-Dimethoxy-alpha-naphthoflavone, 9-(1-(2-Methyl-4-methoxyphenyl))-6-hydroxy-3H-xanthen-3-one, 3-[(4-Methoxyphenyl)methoxy]benzo[c]chromen-6-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 C21H16O4?
C21H16O4 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.