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Molecular formula

C28H18O3

4 compounds have this formula on CompoundList.

Molar mass
402.45g/mol
Monoisotopic mass
402.1256Da
Atoms
49
Elements
3
Rings plus double bonds
20

The formula C28H18O3 describes a molecule made of 28 carbon atoms, 18 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 × 2883.57%
    12.011 × 28 = 336.308 g/mol
  • H Hydrogen × 184.51%
    1.008 × 18 = 18.144 g/mol
  • O Oxygen × 311.93%
    15.999 × 3 = 47.997 g/mol
Look up another formula

Compounds with the formula C28H18O3

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

Showing 1 to 4 of 4 compounds

10-(4-Biphenylyl)-7-methyl-5H-benzo[c]furo[3,2-g]chromen-5-one chemical structure, C28H18O3, CAS 374768-39-5
10-(4-Biphenylyl)-7-methyl-5H-benzo[c]furo[3,2-g]chromen-5-one
CAS 374768-39-5C28H18O3
Spiro[7H-dibenzo[c,h]xanthene-7,1'(3'H)-isobenzofuran]-ar'-carboxylic acid, 3,11-dihydroxy-3'-oxo- chemical structure, C28H18O3, CAS 128724-35-6
Spiro[7H-dibenzo[c,h]xanthene-7,1'(3'H)-isobenzofuran]-ar'-carboxylic acid, 3,11-dihydroxy-3'-oxo-
CAS 128724-35-6C28H18O3
9-Methyl-3-(naphthalen-2-yl)-5-phenyl-7H-furo[3,2-g]chromen-7-one chemical structure, C28H18O3, CAS 376382-89-7
9-Methyl-3-(naphthalen-2-yl)-5-phenyl-7H-furo[3,2-g]chromen-7-one
CAS 376382-89-7C28H18O3
1-Phenyl-2-{4-[4-(phenylethynyl)phenoxy]phenyl}ethane-1,2-dione chemical structure, C28H18O3, CAS 78354-54-8
1-Phenyl-2-{4-[4-(phenylethynyl)phenoxy]phenyl}ethane-1,2-dione
CAS 78354-54-8C28H18O3

Frequently asked questions

What is the molar mass of C28H18O3?

The molar mass of C28H18O3 is 402.45 g/mol, calculated from standard atomic weights for 28 carbon atoms, 18 hydrogen atoms and 3 oxygen atoms. The monoisotopic mass is 402.1256 Da.

How many compounds have the formula C28H18O3?

CompoundList lists 4 compounds with the molecular formula C28H18O3, including 10-(4-Biphenylyl)-7-methyl-5H-benzo[c]furo[3,2-g]chromen-5-one, Spiro[7H-dibenzo[c,h]xanthene-7,1'(3'H)-isobenzofuran]-ar'-carboxylic acid, 3,11-dihydroxy-3'-oxo-, 9-Methyl-3-(naphthalen-2-yl)-5-phenyl-7H-furo[3,2-g]chromen-7-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 C28H18O3?

C28H18O3 has a degree of unsaturation of 20. 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.