Molecular formula
C21H20O3
80 compounds have this formula on CompoundList.
- Molar mass
- 320.39g/mol
- Monoisotopic mass
- 320.1412Da
- Atoms
- 44
- Elements
- 3
- Rings plus double bonds
- 12
The formula C21H20O3 describes a molecule made of 21 carbon atoms, 20 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 × 2178.73%12.011 × 21 = 252.231 g/mol
- H Hydrogen × 206.29%1.008 × 20 = 20.160 g/mol
- O Oxygen × 314.98%15.999 × 3 = 47.997 g/mol
Look up another formula
Compounds with the formula C21H20O3
Isomers we list, best known first. Open one to see its structure, properties, safety data and suppliers.
Showing 1 to 80 of 80 compounds
3,4-Bis(benzyloxy)benzyl alcohol
CAS 1699-58-7C21H20O3
Ethyl 2~5~-oxo-2~2~,2~3~,2~4~,2~5~-tetrahydro(1~1~,2~1~:2~3~,3~1~-terphenyl)-2~4~-carboxylate
CAS 6287-66-7C21H20O3
![(2E,5E)-2,5-Bis[(4-methoxyphenyl)methylidene]cyclopentan-1-one chemical structure, C21H20O3, CAS 5447-53-0](/s/DWPJEPVQLUJRMB-HBKJEHTGSA-N.svg)
(2E,5E)-2,5-Bis[(4-methoxyphenyl)methylidene]cyclopentan-1-one
CAS 5447-53-0C21H20O3
![3-[(3-Methylbenzyl)oxy]-7,8,9,10-tetrahydro-6H-benzo[c]chromen-6-one chemical structure, C21H20O3, CAS 307549-81-1](/s/FQRHOHYQPVDGHD-UHFFFAOYSA-N.svg)
3-[(3-Methylbenzyl)oxy]-7,8,9,10-tetrahydro-6H-benzo[c]chromen-6-one
CAS 307549-81-1C21H20O3
8-Methyl-7-((3-methyl-2-butenyl)oxy)-4-phenyl-2H-chromen-2-one
CAS 374765-45-4C21H20O3
Bis(2-methoxyphenyl)(phenyl)methanol
CAS 6333-10-4C21H20O3
![Cyclopentanone, 2,5-bis[(2-methoxyphenyl)methylene]- chemical structure, C21H20O3, CAS 577995-40-5](/s/IOYDQEKSUHPMDT-UHFFFAOYSA-N.svg)
Cyclopentanone, 2,5-bis[(2-methoxyphenyl)methylene]-
CAS 577995-40-5C21H20O3
![3-((4-Methylbenzyl)oxy)-7,8,9,10-tetrahydro-6H-benzo[c]chromen-6-one chemical structure, C21H20O3, CAS 5745-17-5](/s/JUDMPCALXDARSW-UHFFFAOYSA-N.svg)
3-((4-Methylbenzyl)oxy)-7,8,9,10-tetrahydro-6H-benzo[c]chromen-6-one
CAS 5745-17-5C21H20O3
Nigerapyrone B
CAS 1318240-73-1C21H20O3
2-Methyl-7-((3-methylbut-2-en-1-yl)oxy)-3-phenyl-4H-chromen-4-one
CAS 70894-39-2C21H20O3
![4-Methyl-7-[(3-methylbut-2-en-1-yl)oxy]-3-phenyl-2H-chromen-2-one chemical structure, C21H20O3, CAS 869079-92-5](/s/MVGKJAWNEQCEEC-UHFFFAOYSA-N.svg)
4-Methyl-7-[(3-methylbut-2-en-1-yl)oxy]-3-phenyl-2H-chromen-2-one
CAS 869079-92-5C21H20O3
4-Methoxy-alpha-(4-methoxyphenyl)-alpha-phenylbenzenemethanol
CAS 40615-35-8C21H20O3
3,5-Dibenzyloxybenzyl alcohol
CAS 24131-31-5C21H20O3
2,4-Dibenzyloxybenzyl alcohol
CAS 33617-58-2C21H20O3
Phenol, (1-propanyl-3-ylidene)tris-
CAS 29036-21-3C21H20O3
(Z)-2-(2-Methylbenzylidene)-6-((3-methylbut-2-en-1-yl)oxy)benzofuran-3(2H)-one
CAS 622807-60-7C21H20O3
(Z)-2-(3-Methylbenzylidene)-6-((3-methylbut-2-en-1-yl)oxy)benzofuran-3(2H)-one
CAS 622807-53-8C21H20O3
2,6-Bis(2-hydroxy-5-methylphenyl)-4-methylphenol
CAS 71128-89-7C21H20O3
7-Oxo-7-(9-phenanthryl)heptanoic acid
CAS 898766-07-9C21H20O3
Ethyl 5-oxo-5-(9-phenanthryl)valerate
CAS 898752-88-0C21H20O3
5-Methyl-2-(2-oxo-2-(4-phenylphenyl)ethyl)cyclohexane-1,3-dione
CAS 1023850-58-9C21H20O3
![9-[3-(1,3-Dioxan-2-yl)propionyl]phenanthrene chemical structure, C21H20O3, CAS 898756-44-0](/s/YQOFECLBAMKMOH-UHFFFAOYSA-N.svg)
9-[3-(1,3-Dioxan-2-yl)propionyl]phenanthrene
CAS 898756-44-0C21H20O3
![9-[3-(1,3-Dioxan-2-yl)propionyl]anthracene chemical structure, C21H20O3, CAS 898757-47-6](/s/ZVZNVQRYUYDQKR-UHFFFAOYSA-N.svg)
9-[3-(1,3-Dioxan-2-yl)propionyl]anthracene
CAS 898757-47-6C21H20O3
p,p',p''-(1-Propanyl-3-ylidene)triphenol
CAS 4137-11-5C21H20O3
- 3-Benzyl-4-methyl-7-[(2-methylprop-2-en-1-yl)oxy]-2H-chromen-2-one374709-28-1C21H20O3
- 2-Cyclopropyl-5-[(3,5-dimethylbenzyl)oxy]-1-benzofuran-3-carbaldehyde1210670-18-0C21H20O3
- 2-Methoxy-6-(2-naphthalen-1-yl-ethyl)-benzoic acid methyl ester1171921-51-9C21H20O3
- 2,6-Bis((4-hydroxyphenyl)methylene)-4-methylcyclohexanone53551-76-1C21H20O3
- 1-(4-Methoxyphenyl)-1,2-diphenylethane-1,2-diol5164-81-8C21H20O3
- 5-(3,4-Dimethylphenyl)-3-(3-methoxy-4-methylbenzylidene)-2(3H)-furanone333393-89-8C21H20O3
- 1-Methoxy-2,4-bis(phenylmethoxy)benzene6383-02-4C21H20O3
- 5H-Furo[3,2-b]pyran-5-one, hexahydro-2-phenyl-3a-(1-phenylethenyl)-918662-68-7C21H20O3
- (2,4-Dimethoxyphenyl)-diphenylmethanol66284-46-6C21H20O3
- 2-(4-Methylphenoxy)-4a,9b-dihydro-8,9b-dimethyl-3(4H)-dibenzofuranone53042-30-1C21H20O3
- 3-(1-Hydroxy-4,4-diphenylcyclohexyl)prop-2-ynoic acid681460-17-3C21H20O3
- 2-(4-Pentylbenzoyl)-1-benzofuran-5-carbaldehyde300665-10-5C21H20O3
- 6-Hydroxy-3,3-dimethyl-9-phenyl-4,9-dihydro-2H-xanthen-1-one368434-69-9C21H20O3
- 5'-Methoxy-2'-(3-methoxybenzyl)biphenyl-4-ol679410-62-9C21H20O3
- Benzene, 4-methoxy-1,2-bis(phenylmethoxy)-88755-15-1C21H20O3
- Abbottin106327-62-2C21H20O3
- 2,3-Dimethoxy-7,7-dimethyl-7H-benzo[c]fluoren-5-ol329786-17-6C21H20O3
- (2-((4-Methoxybenzyl)oxy)phenyl)(phenyl)methanol1100805-65-9C21H20O3
- Ethyl 2-(3-(benzyloxy)naphthalen-1-yl)acetate611235-21-3C21H20O3
- 2-Methoxy-6-(2-naphthalen-2-yl-ethyl)-benzoic acid methyl ester1171924-79-0C21H20O3
- anti-1,2,3,4-Tetrahydro-5-propylchrysene-1,2-diol-3,4-epoxide119613-69-3C21H20O3
- Bicyclo(3.1.0)hex-2-ene-6-carboxylic acid, 3-methyl-, (3-phenoxyphenyl)methyl ester, (1alpha,5alpha,6beta)-98973-76-3C21H20O3
- 3,4,8-Trimethyl-7-{[(2E)-3-phenylprop-2-en-1-yl]oxy}-2H-chromen-2-one1656270-43-7C21H20O3
- 7-(Benzyloxy)-6-(3-methylbut-2-en-1-yl)-2H-1-benzopyran-2-one107052-38-0C21H20O3
- Benzoic acid, 4-(((8R)-5,6,7,8-tetrahydro-8-hydroxy-5,5-dimethyl-2-naphthalenyl)ethynyl)-226250-16-4C21H20O3
- Benzoic acid, 4-(((8S)-5,6,7,8-tetrahydro-8-hydroxy-5,5-dimethyl-2-naphthalenyl)ethynyl)-226250-19-7C21H20O3
- 4,4'-[(2-Hydroxyphenyl)methylene]bis(2-methylphenol)114626-68-5C21H20O3
- (2,6-Bis-benzyloxyphenyl)-methanol25983-52-2C21H20O3
- 6,8-Dimethoxy-3-methyl-2,7-dihydrotetraphen-12(1H)-one88165-36-0C21H20O3
- [2,3-Bis(benzyloxy)phenyl]methanol81464-84-8C21H20O3
- Benzeneethanol, beta-methoxy-beta-phenoxy-alpha-phenyl-17059-77-7C21H20O3
- Furo[3,2-c]oxepin-4(2H)-one, 3,6,7,8-tetrahydro-6-methyl-2,2-diphenyl-835613-72-4C21H20O3
- 2-[[4-(1,1-Dimethylethyl)phenyl]methyl]-3-hydroxy-1,4-naphthalenedione104907-53-1C21H20O3
- 1,1'-[(2-Methoxy-1,4-phenylene)bis(oxymethylene)]dibenzene61654-73-7C21H20O3
- 4,4',4''-(Propane-1,1,1-triyl)triphenol141888-09-7C21H20O3
- 3,9-Dimethoxy-7,7-dimethyl-7H-benzo[C]fluoren-5-ol869796-84-9C21H20O3
- 4,4'-[(4-Ethoxyphenyl)methylene]diphenol95640-50-9C21H20O3
- 2-(2-(4-Methoxynaphthalen-2-yl)phenyl)butanoic acid1393793-96-8C21H20O3
- 1,1-Bis(4-(allyloxy)phenyl)prop-2-yn-1-ol1300688-43-0C21H20O3
- 2-[(3-Hydroxyphenyl)methylidene]-6-[(3-methoxyphenyl)methylidene]cyclohexan-1-one1181459-62-0C21H20O3
- 2-(4-Methoxyphenyl)-1,1-diphenylethane-1,2-diol4237-52-9C21H20O3
- 3-(6-Methoxy-2-naphthalenyl)-1-(4-methoxyphenyl)-1-propanone42924-55-0C21H20O3
- (3-Phenoxyphenyl)methyl (1R,5R,6S)-3-methylbicyclo(3.1.0)hex-3-ene-6-carboxylate98875-08-2C21H20O3
- [4-(Benzyloxy)-3-methoxyphenyl](phenyl)methanol96306-72-8C21H20O3
- 2-Methoxy-1,3-bis(2-methoxyphenyl)benzene83604-34-6C21H20O3
- 2-(2-Oxocyclopentyl)-1,4-diphenylbutane-1,4-dione570391-52-5C21H20O3
- 1,7-Bis(3-methoxyphenyl)hepta-1,6-diyn-4-ol138333-47-8C21H20O3
- 3-{[2-(Hydroxymethyl)phenyl]methyl}-2-[(2-hydroxyphenyl)methyl]phenol116057-44-4C21H20O3
- 2,7-Bis[(4-hydroxyphenyl)methylidene]cycloheptan-1-one134270-03-4C21H20O3
- 2-[3-Oxo-3-(4-propylphenyl)propyl]-1H-indene-1,3(2H)-dione22291-42-5C21H20O3
- Methyl 2-acetyl-6,6-diphenylhexa-3,5-dienoate62565-02-0C21H20O3
- Ethyl 6-oxo-2,4-diphenylcyclohex-2-ene-1-carboxylate90016-05-0C21H20O3
- (2'-(Benzyloxy)-[1,1'-biphenyl]-3,5-diyl)dimethanol2989390-42-1C21H20O3
- 4H-1-Benzopyran-4-one, 2,3-dihydro-7-methoxy-8-(3-methyl-1-3-butadienyl)-2-phenyl-90509-05-0C21H20O3
- 2,5-Dimethoxy-alpha,alpha-diphenylbenzenemethanol861096-63-1C21H20O3
- Ethyl (1S,6S)-2-oxo-4,6-diphenylcyclohex-3-ene-1-carboxylate113737-81-8C21H20O3
Frequently asked questions
What is the molar mass of C21H20O3?
The molar mass of C21H20O3 is 320.39 g/mol, calculated from standard atomic weights for 21 carbon atoms, 20 hydrogen atoms and 3 oxygen atoms. The monoisotopic mass is 320.1412 Da.
How many compounds have the formula C21H20O3?
CompoundList lists 80 compounds with the molecular formula C21H20O3, including 3,4-Bis(benzyloxy)benzyl alcohol, Ethyl 2~5~-oxo-2~2~,2~3~,2~4~,2~5~-tetrahydro(1~1~,2~1~:2~3~,3~1~-terphenyl)-2~4~-carboxylate, (2E,5E)-2,5-Bis[(4-methoxyphenyl)methylidene]cyclopentan-1-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 C21H20O3?
C21H20O3 has a degree of unsaturation of 12. 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.