Molecular formula

C₁₈H₁₈O₃S

23 compounds have this formula on CompoundList.

Molar mass: 314.40g/mol
Monoisotopic mass: 314.0977Da
Atoms: 40
Elements: 4
Rings plus double bonds: 10

The formula C18H18O3S describes a molecule made of 18 carbon atoms, 18 hydrogen atoms, 3 oxygen atoms and 1 sulfur atom. 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 × 1868.77%
12.011 × 18 = 216.198 g/mol
H Hydrogen × 185.77%
1.008 × 18 = 18.144 g/mol
O Oxygen × 315.27%
15.999 × 3 = 47.997 g/mol
S Sulfur × 110.20%
32.06 × 1 = 32.060 g/mol

Look up another formula

Compounds with the formula C18H18O3S

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

Showing 1 to 23 of 23 compounds

4-(4-Methylphenyl)-2-[(4-methylphenyl)sulfanyl]-4-oxobutanoic acid

CAS 298217-65-9C₁₈H₁₈O₃S

2-[(4-Methylphenyl)sulfonylmethyl]-3,4-dihydro-2H-naphthalen-1-one

CAS 25964-44-7C₁₈H₁₈O₃S

3-(2,5-Dimethoxyphenyl)-1-[4-(methylsulfanyl)phenyl]-2-propen-1-one

CAS 1383425-67-9C₁₈H₁₈O₃S

I(2)-Methyl-I-oxo-4-(phenylthio)benzenepentanoic acid

CAS 64157-57-9C₁₈H₁₈O₃S

Methyl 2-(2-(phenylthio)-5-propionylphenyl)acetate

CAS 108051-48-5C₁₈H₁₈O₃S

Acetic acid, ((1-(9H-fluoren-2-yl)ethyl)sulfinyl)-, methyl ester

CAS 72322-80-6C₁₈H₁₈O₃S

4-[(E)-3-(2-Thienyl)-2-propenoyl]phenyl pivalate

CAS 306730-46-1C₁₈H₁₈O₃S

2-(Methanesulfinyl)-1,5-diphenylpentane-1,5-dione

CAS 100749-27-7C₁₈H₁₈O₃S

Sulfonium, (1-(ethoxycarbonyl)-2-oxopropyl)diphenyl-, inner salt

CAS 14070-61-2C₁₈H₁₈O₃S

(2-Butyl-3-benzofuranyl)(4-methoxy-2-thienyl)methanone

CAS 128995-60-8C₁₈H₁₈O₃S

2H-1-Benzopyran, 2-(4-methoxyphenyl)-3-[(methylthio)methoxy]-

CAS 62232-18-2C₁₈H₁₈O₃S

2-(Benzenesulfonyl)-2-(2-methylprop-1-en-1-yl)-3-phenyloxirane

CAS 88958-82-1C₁₈H₁₈O₃S

1-(Benzenesulfonyl)-4-methyl-1-phenylpent-3-en-2-one

CAS 88958-87-6C₁₈H₁₈O₃S

2-[(2-Oxo-2-phenylethyl)sulfanyl]-1-phenylethyl acetate

CAS 88358-43-4C₁₈H₁₈O₃S

7,8-Dimethoxy-2-phenyl-3,4-dihydro-1-benzothiepin-5(2H)-one

CAS 108612-38-0C₁₈H₁₈O₃S

Methyl 2-(benzenesulfinyl)-5-phenylpent-2-enoate

CAS 138770-95-3C₁₈H₁₈O₃S

6-[(Benzenesulfonyl)methyl]-5-phenyl-3,4-dihydro-2H-pyran

CAS 61171-87-7C₁₈H₁₈O₃S

2-(Benzenesulfonyl)-6-phenylcyclohexan-1-one

CAS 61171-86-6C₁₈H₁₈O₃S

S-[3-(4-Benzoylphenoxy)propyl] ethanethioate

CAS 929073-14-3C₁₈H₁₈O₃S

(E)-3-Benzylidene-4-tosyltetrahydrofuran

CAS 89479-03-8C₁₈H₁₈O₃S

(Z)-3-Benzylidene-4-tosyltetrahydrofuran

CAS 89479-02-7C₁₈H₁₈O₃S

Methyl 2-(10-hydroxy-10,11-dihydrodibenzo[b,f]thiepin-2-yl)propanoate

CAS 2768597-13-1C₁₈H₁₈O₃S

Methyl (E)-4-methoxy-3-phenyl-4-phenylsulfanylbut-2-enoate

CAS 89171-40-4C₁₈H₁₈O₃S

Frequently asked questions

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What is the molar mass of C18H18O3S?

The molar mass of C18H18O3S is 314.40 g/mol, calculated from standard atomic weights for 18 carbon atoms, 18 hydrogen atoms, 3 oxygen atoms and 1 sulfur atom. The monoisotopic mass is 314.0977 Da.

How many compounds have the formula C18H18O3S?

CompoundList lists 23 compounds with the molecular formula C18H18O3S, including 4-(4-Methylphenyl)-2-[(4-methylphenyl)sulfanyl]-4-oxobutanoic acid, 2-[(4-Methylphenyl)sulfonylmethyl]-3,4-dihydro-2H-naphthalen-1-one, 3-(2,5-Dimethoxyphenyl)-1-[4-(methylsulfanyl)phenyl]-2-propen-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 C18H18O3S?

C18H18O3S has a degree of unsaturation of 10. 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.