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 1 to 100 of 125 compounds
Levonorgestrel
CAS 797-63-7C21H28O2
Tibolone
CAS 5630-53-5C21H28O2
Dydrogesterone
CAS 152-62-5C21H28O2
Norgestrel
CAS 2376035-98-0C21H28O2
Ethisterone
CAS 434-03-7C21H28O2
Guggulsterone
CAS 95975-55-6C21H28O2
E-Guggulsterone
CAS 39025-24-6C21H28O2
Tetrahydrogestrinone
CAS 618903-56-3C21H28O2
Pregna-4,16-diene-3,20-dione
CAS 1096-38-4C21H28O2
Isotibolone
CAS 1162-60-3C21H28O2
1-Dehydroprogesterone
CAS 1162-54-5C21H28O2
Avarone
CAS 55303-99-6C21H28O2
2,2-Bis(4-hydroxy-3-isopropylphenyl)propane
CAS 127-54-8C21H28O2
(8alpha,9beta,10alpha,13alpha,14beta)-13-Ethyl-17-hydroxy-18,19-dinorpregn-4-en-20-yn-3-one
CAS 797-64-8C21H28O2
6-Dehydroprogesterone
CAS 1162-56-7C21H28O2
Demegestone
CAS 10116-22-0C21H28O2
9-Dehydro-progesterone
CAS 17652-16-3C21H28O2
![Peroxide, 1-methyl-1-[(1-methylethyl)phenyl]ethyl 1-methyl-1-phenylethyl chemical structure, C21H28O2, CAS 71566-50-2](/s/XEFAUYWDKZORII-UHFFFAOYSA-N.svg)
Peroxide, 1-methyl-1-[(1-methylethyl)phenyl]ethyl 1-methyl-1-phenylethyl
CAS 71566-50-2C21H28O2
![8-[4-(4-Methylphenyl)-3-cyclohexen-1-yl]-1,4-dioxaspiro[4.5]decane chemical structure, C21H28O2, CAS 125962-78-9](/s/BSEAXOKTPOWGRM-UHFFFAOYSA-N.svg)
8-[4-(4-Methylphenyl)-3-cyclohexen-1-yl]-1,4-dioxaspiro[4.5]decane
CAS 125962-78-9C21H28O2
11-Dehydroprogesterone
CAS 2625-60-7C21H28O2
Neoavarone
CAS 129445-46-1C21H28O2
![4-tert-Butyl-2-[(5-tert-butyl-2-hydroxyphenyl)methyl]phenol chemical structure, C21H28O2, CAS 799-13-3](/s/RXAGDDKHRDAVLM-UHFFFAOYSA-N.svg)
4-tert-Butyl-2-[(5-tert-butyl-2-hydroxyphenyl)methyl]phenol
CAS 799-13-3C21H28O2
17-Allylestra-1,3,5(10)-triene-3,17beta-diol
CAS 971-82-4C21H28O2
17alpha-Vinylestradiol 3-methyl ether
CAS 6885-48-9C21H28O2
- 4,4'-(5,5-Nonanediyl)diphenol57547-76-9C21H28O2
- RefChem:17840742438-88-0C21H28O2
- 12-Hydroxymethylretinoic acid delta-lactone83860-24-6C21H28O2
- Dictyochromenol93398-32-4C21H28O2
- 4-[1-Ethyl-1-(4-hydroxy-3,5-dimethylphenyl)propyl]-2,6-dimethylphenol13044-18-3C21H28O2
- Tibolone EP impurity D32297-45-3C21H28O2
- Levonorgestrel EP impurity B19914-67-1C21H28O2
- Mdl 102253142645-70-3C21H28O2
- Levonorgestrel EP impurity P100021-05-4C21H28O2
- 4-Ethenylideneandrostane-3,17-dione84958-35-0C21H28O2
- 3-Methoxy-19-norpregna-1,3,5(10)-trien-20-one1624-73-3C21H28O2
- 9beta,10alpha,17alpha-Pregna-4,6-diene-3,20-dione246038-13-1C21H28O2
- 2,2'-Methylenebis(6-tert-butylphenol)133-63-1C21H28O2
- 19-Ethynyl-19-hydroxyandrost-4-en-17-one135144-30-8C21H28O2
- 1 suppliersPregna-4,14-diene-3,20-dione24377-08-0C21H28O2
- 7alpha-(Prop-2-en-1-yl)estra-1(10),2,4-triene-3,17beta-diol119020-31-4C21H28O2
- (8S,13S,14S,17S)-17-Hydroxy-2,2,13,17-tetramethyl-6,7,8,14,15,16-hexahydro-1H-cyclopenta[a]phenanthren-3-one23983-19-9C21H28O2
- Benzene, 1,1'-(2,2-dimethylpropylidene)bis(4-ethoxy-27955-87-9C21H28O2
- 3-Methoxy-16,16-dimethylestra-1,3,5(10)-trien-17-one54793-02-1C21H28O2
- 2-(3-Benzyloxyphenyl)octan-2-ol84533-97-1C21H28O2
- 1 suppliersEpilevonorgestrel178737-52-5C21H28O2
- Pregn-4-en-20-yn-3-one, 17-hydroxy-, (17a)-83509-38-0C21H28O2
- 3-(p-Methoxybenzyl)-4-(p-methoxyphenyl)hexane4468-39-7C21H28O2
- 4,4'-(Pentane-2,2-diyl)bis(2,6-dimethylphenol)122419-17-4C21H28O2
- 4,4'-Methylenebis(2-tert-butylphenol)32861-23-7C21H28O2
- 15beta,16beta-Methylene-3-methoxyandrosta-3,5-diene-17-one26441-40-7C21H28O2
- 2-(2-(Benzyloxy)-5-(tert-butyl)phenyl)-2-methylpropan-1-ol1246213-29-5C21H28O2
- 4,4'-(1-Methyloctylidene)bisphenol6807-18-7C21H28O2
- 4-(Benzyloxy)-2,6-di-tert-butylphenol2444-24-8C21H28O2
- Arenarone87764-16-7C21H28O2
- (9beta)-Pregna-4,6-diene-3,20-dione2640-38-2C21H28O2
- 21-Methylnorethisterone7359-79-7C21H28O2
- rac 8alpha-[Delta-5(10)]-Norgestrel5541-87-7C21H28O2
- A)-pregna-1,4-diene-3,20-dione1424-06-2C21H28O2
- 3-(p-Isopropylphenyl)-2-methyl-1-(phenethyloxy)propanol85665-82-3C21H28O2
- Dinordrin I (free alcohol)64675-09-8C21H28O2
- 1-Methyl-3-(2,6,6-trimethyl-2-cyclohexen-1-yl)allyl phenylacetate93805-75-5C21H28O2
- 16-Acetylandrosta-4,16-dien-3-one14508-12-4C21H28O2
- 19-Nor-17-alpha-pregn-4-en-20-yn-3-one, 17-methoxy-70795-38-9C21H28O2
- 1H-Inden-1-ol, octahydro-4,7a-diethyl-1-ethynyl-5-(4-hydroxyphenyl)-(1-alpha,3a-beta,4-beta,5-alpha,7a-alpha)-(+-)-95733-57-6C21H28O2
- Tetrahydrogestrinone-d4856893-82-8C21H28O2
- (-)-Avarone186416-52-4C21H28O2
- Benzene, 1-ethoxy-4-(2-methyl-2-(4-propoxyphenyl)propyl)-59900-55-9C21H28O2
- D(17a)-Homo-C,18-dinorpregna-13,15,17-trien-20-one, 3-hydroxy-17a-methyl-, (3beta,5alpha)-1162-58-9C21H28O2
- Pregna-4,7-diene-3,20-dione17398-60-6C21H28O2
- 4-(Decyloxy)-1-naphthaldehyde54821-61-3C21H28O2
- 4-(2,6,10-Trimethylundeca-1,5,9-trien-1-yl)benzoic acid90394-57-3C21H28O2
- Pregna-4,8-diene-3,20-dione83603-61-6C21H28O2
- Benzene, 1-(2-ethylbutyl)-4-(2-(4-methoxyphenyl)ethoxy)-125814-10-0C21H28O2
- Spiro[(tricyclo[6.2.2.0(2,7)]dodeca-5,9-diene)-4,1'-cyclobutane]-11,2'-dione, 1,3,3,5,12,12-hexamethyl-1005121-64-1C21H28O2
- Agn-PC-0jnqgo5054-73-9C21H28O2
- (8R,9S,13S,14S)-13-Methyl-3-propoxy-7,8,9,11,12,14,15,16-octahydro-6H-cyclopenta[a]phenanthren-17-one1852-86-4C21H28O2
- 6-Decyl-2-naphthoic acid329065-77-2C21H28O2
- Dydrogesterone impurity 625093-47-4C21H28O2
- 4-(2-Ethoxyethoxy)-4'-pentyl-1,1'-biphenyl1119962-73-0C21H28O2
- 15alpha-(Prop-2-en-1-yl)estra-1(10),2,4-triene-3,17beta-diol197291-86-4C21H28O2
- Progesterone impurity 633066226-29-4C21H28O2
- Benzene, 1-(2-(4-(2-ethylbutyl)phenoxy)ethyl)-3-methoxy-125796-86-3C21H28O2
- Benzene, 1-(2-ethylbutyl)-4-(2-(4-methylphenoxy)ethoxy)-125796-90-9C21H28O2
- Benzene, 1-(2-(4-(2-ethylbutyl)phenoxy)ethoxy)-3-methyl-125796-91-0C21H28O2
- Benzene, 1-(2-ethylbutyl)-4-(3-phenoxypropoxy)-125796-97-6C21H28O2
- 1-(2,2-Dimethylpropyl)-4-((4-propan-2-yloxyphenyl)methoxy)benzene128631-92-5C21H28O2
- Benzene, 1-(2-ethylbutyl)-4-(2-(2-methylphenoxy)ethoxy)-128659-14-3C21H28O2
- Benzene, 1-(4-(2-ethylbutyl)phenoxy)-4-propoxy-125796-65-8C21H28O2
- Benzene, 1-(4-(2-ethylbutyl)phenoxy)-3-propoxy-125796-67-0C21H28O2
- Benzene, 1-ethoxy-4-((4-(2-ethylbutyl)phenoxy)methyl)-125796-80-7C21H28O2
- (3aS,5aS,9aS,9bS)-3-Ethynyl-3-hydroxy-3a-methyl-7-methylidenespiro[2,4,5,5a,8,9,9a,9b-octahydro-1H-cyclopenta[a]naphthalene-6,2'-cyclopentane]-1'-one61599-38-0C21H28O2
- 9-(4-Methoxy-2,3,6-trimethylphenyl)-3,7-dimethyl-2,4,6,8-nonatetraen-1-ol (all-E)-61630-49-7C21H28O2
- 3b-Hydroxy-pregna-5,14,16-trien-20-one5186-13-0C21H28O2
- (13alpha,17alpha)-17-Hydroxypregn-4-en-20-yn-3-one41460-94-0C21H28O2
- 4-[(4-Hydroxy-3,5-dimethylphenyl)methyl]-2,6-di(propan-2-yl)phenol105421-73-6C21H28O2
- Methyl 6-dehydroabietate18492-76-7C21H28O2
- 11,12-Dihydro altrenogest141299-96-9C21H28O2
- 1-Methyl-3-(2,6,6-trimethyl-1-cyclohexen-1-yl)allyl phenylacetate94134-77-7C21H28O2
- 3,3'-Methylenebis(2-tert-butylphenol)848696-63-9C21H28O2
- 4,4'-(Heptane-1,1-diyl)bis(2-methylphenol)57100-84-2C21H28O2
Frequently asked questions
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 Levonorgestrel, Tibolone, Dydrogesterone. 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.