C21H40O2
45 compounds have this formula on CompoundList.
- Molar mass
- 324.55g/mol
- Monoisotopic mass
- 324.3028Da
- Atoms
- 63
- Elements
- 3
- Rings plus double bonds
- 2
The formula C21H40O2 describes a molecule made of 21 carbon atoms, 40 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 × 2177.72%12.011 × 21 = 252.231 g/mol
- H Hydrogen × 4012.42%1.008 × 40 = 40.320 g/mol
- O Oxygen × 29.86%15.999 × 2 = 31.998 g/mol
Compounds with the formula C21H40O2
Isomers we list, best known first. Open one to see its structure, properties, safety data and suppliers.
Showing 1 to 45 of 45 compounds
![(5R)-5-Methyl-5-[(4R,8R)-4,8,12-trimethyltridecyl]oxolan-2-one chemical structure, C21H40O2, CAS 225668-83-7](/s/LGWNRNDWDZHUNP-SFHLNBCPSA-N.svg)
- (E)-9-Octadecenoic acid propyl ester58930-02-2C21H40O2
- Methyl (2Z)-3-methylnonadec-2-enoate42585-77-3C21H40O2
- 9-Eicosenoic acid methyl ester10340-21-3C21H40O2
- 2-Octyldecyl prop-2-enoate192181-73-0C21H40O2
- 3-Pentadecylcyclopentane-1-carboxylic acid65148-97-2C21H40O2
- Ethyl 3-octylundec-2-enoate1416474-12-8C21H40O2
- Propan-2-yl octadec-9-enoate17364-07-7C21H40O2
- Propyl octadec-6-enoate37826-29-2C21H40O2
- Ethyl 8-(2-octylcyclopropyl)octanoate495397-85-8C21H40O2
- 3-Methylbutyl hexadec-9-enoate114046-22-9C21H40O2
- 3-Methylbut-2-EN-1-yl hexadecanoate78405-71-7C21H40O2
- 5-Methyl-5-[(4R,8R)-4,8,12-trimethyltridecyl]oxolan-2-one690657-08-0C21H40O2
- Octadec-9-enyl glycidyl etherC21H40O2
- Methyl (2Z)-2-eicosenoate2507847-41-6C21H40O2
- (R,Z)-2-((Octadec-9-enyloxy)methyl)oxiraneC21H40O2
- Ethyl 8-methyloctadec-8-enoate114927-89-8C21H40O2
- Methyl 17-cyclopropylheptadecanoate60128-87-2C21H40O2
- 2-Methyl-3-octyl-2-undecenoic acid methyl ester55133-84-1C21H40O2
- 3-Hexadecylpentane-2,4-dione73923-17-8C21H40O2
- 2-[[(E)-Octadec-9-enoxy]methyl]oxiraneC21H40O2
- Methyl (Z)-icos-10-enoate69120-00-9C21H40O2
Frequently asked questions
What is the molar mass of C21H40O2?
The molar mass of C21H40O2 is 324.55 g/mol, calculated from standard atomic weights for 21 carbon atoms, 40 hydrogen atoms and 2 oxygen atoms. The monoisotopic mass is 324.3028 Da.
How many compounds have the formula C21H40O2?
CompoundList lists 45 compounds with the molecular formula C21H40O2, including Stearyl acrylate, Isopropyl oleate, Propyl oleate. 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 C21H40O2?
C21H40O2 has a degree of unsaturation of 2. 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.