Molecular formula

C₂₁H₃₄O₂

125 compounds have this formula on CompoundList.

Molar mass: 318.50g/mol
Monoisotopic mass: 326.3061Da
Atoms: 57
Elements: 3
Rings plus double bonds: 5

The formula C21H34O2 describes a molecule made of 21 carbon atoms, 34 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 × 2179.19%
12.011 × 21 = 252.231 g/mol
H Hydrogen × 3410.76%
1.008 × 34 = 34.272 g/mol
O Oxygen × 210.05%
15.999 × 2 = 31.998 g/mol

Look up another formula

Compounds with the formula C21H34O2

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

Showing 101 to 125 of 125 compounds

(3S,8R,9S,10R,13S,14S,17S)-4,4,10,13-Tetramethyl-1,2,3,7,8,9,11,12,14,15,16,17-dodecahydrocyclopenta[a]phenanthrene-3,17-diol

CAS 13102-72-2C₂₁H₃₄O₂

[(5S,8R,9S,10S,13S,14S,17S)-10,13-Dimethyl-2,3,4,5,6,7,8,9,11,12,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-17-yl] acetate

CAS 6198-15-8C₂₁H₃₄O₂

(3S,8S,9S,10R,13R,14S,16S)-3-Methoxy-10,13,16-trimethyl-1,2,3,4,7,8,9,11,12,14,15,17-dodecahydrocyclopenta[a]phenanthren-16-ol

CAS 4608-60-0C₂₁H₃₄O₂

(3R,5S,8R,9S,10S,13S,14S,17S)-10,13,17-Trimethyl-2-methylidene-3,4,5,6,7,8,9,11,12,14,15,16-dodecahydro-1H-cyclopenta[a]phenanthrene-3,17-diol

CAS 4424-46-8C₂₁H₃₄O₂

Methyl 7-isopropyl-1,4A-dimethyl-2,3,4,4B,5,6,8A,9,10,10A-decahydrophenanthrene-1-carboxylate

C₂₁H₃₄O₂

3-n-Pentadecyl-1,4-benzoquinone

CAS 41427-22-9C₂₁H₃₄O₂

3-Phenylpropyl dodecanoate

CAS 85733-01-3C₂₁H₃₄O₂

6(Z),9(Z),12(Z),15(Z)-Heneicosatetraenoic acid

CAS 24257-12-3C₂₁H₃₄O₂

Ethyl 2-dodecylbenzoate

CAS 959140-98-8C₂₁H₃₄O₂

14-(Benzyloxy)tetradecanal

CAS 286854-05-5C₂₁H₃₄O₂

1-(3-Dodecyl-4-methoxyphenyl)ethan-1-one

CAS 63738-25-0C₂₁H₃₄O₂

Ethyl 4-dodecylbenzoate

CAS 86892-28-6C₂₁H₃₄O₂

Heneicosatetraenoic acid

C₂₁H₃₄O₂

5alpha-Pregnan-3beta-ol-20-one-17alpha,21,21,21-d4

C₂₁H₃₄O₂

5[Alpha]-etianic acid methyl ester

CAS 15173-52-1C₂₁H₃₄O₂

(5beta,7alpha,17beta)-17-Hydroxy-7,17-dimethyl-androstan-3-one

CAS 13610-99-6C₂₁H₃₄O₂

(8R,9S,10S,13S,14S,17S)-17-[(1S)-1-Hydroxyethyl]-10,13-dimethyl-1,2,4,5,6,7,8,9,11,12,14,15,16,17-tetradecahydrocyclopenta[a]phenanthren-3-one

CAS 22342-56-9C₂₁H₃₄O₂

5| inverted exclamation mark-PREGNAN-3| cent-OL-20-ONE-17| inverted exclamation mark,21,21,21-D4

C₂₁H₃₄O₂

(5S,8S,9S,10S,13S,14S)-10,13-Dimethylspiro[1,2,4,5,6,7,8,9,11,12,14,15,16,17-tetradecahydrocyclopenta[a]phenanthrene-3,2'-1,3-dioxolane]

CAS 1434-14-6C₂₁H₃₄O₂

1-((5S,8R,9S,10S,13R,14S,17S)-14-Hydroxy-10,13-dimethylhexadecahydro-1H-cyclopenta[a]phenanthren-17-yl)ethan-1-one

CAS 134392-83-9C₂₁H₃₄O₂

Methyl (5E,8Z,11Z,14Z)-icosa-5,8,11,14-tetraenoate

CAS 62319-56-6C₂₁H₃₄O₂

2a,17a-Dimethyl-17B-hydroxy-5a-androstan-3-one

C₂₁H₃₄O₂

Androstan-3-one, 17b-hydroxy-2a,17-dimethyl-(7CI)

C₂₁H₃₄O₂

2,2,2-Trideuterio-1-[(3S,5S,17S)-17-deuterio-3-hydroxy-10,13-dimethyl-1,2,3,4,5,6,7,8,9,11,12,14,15,16-tetradecahydrocyclopenta[a]phenanthren-17-yl]ethanone

C₂₁H₃₄O₂

Methyl (5E,8E,11E,14E)-19,19,20,20,20-pentadeuterioicosa-5,8,11,14-tetraenoate
C₂₁H₃₄O₂

Frequently asked questions

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What is the molar mass of C21H34O2?

The molar mass of C21H34O2 is 318.50 g/mol, calculated from standard atomic weights for 21 carbon atoms, 34 hydrogen atoms and 2 oxygen atoms. The monoisotopic mass is 326.3061 Da.

How many compounds have the formula C21H34O2?

CompoundList lists 125 compounds with the molecular formula C21H34O2, including (3S,8R,9S,10R,13S,14S,17S)-4,4,10,13-Tetramethyl-1,2,3,7,8,9,11,12,14,15,16,17-dodecahydrocyclopenta[a]phenanthrene-3,17-diol, [(5S,8R,9S,10S,13S,14S,17S)-10,13-Dimethyl-2,3,4,5,6,7,8,9,11,12,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-17-yl] acetate, (3S,8S,9S,10R,13R,14S,16S)-3-Methoxy-10,13,16-trimethyl-1,2,3,4,7,8,9,11,12,14,15,17-dodecahydrocyclopenta[a]phenanthren-16-ol. 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 C21H34O2?

C21H34O2 has a degree of unsaturation of 5. 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.