Molecular formula

C₁₈H₁₁NO₅S

16 compounds have this formula on CompoundList.

Molar mass: 353.35g/mol
Monoisotopic mass: 353.0358Da
Atoms: 36
Elements: 5
Rings plus double bonds: 14

The formula C18H11NO5S describes a molecule made of 18 carbon atoms, 11 hydrogen atoms, 1 nitrogen atom, 5 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 × 1861.19%
12.011 × 18 = 216.198 g/mol
H Hydrogen × 113.14%
1.008 × 11 = 11.088 g/mol
N Nitrogen × 13.96%
14.007 × 1 = 14.007 g/mol
O Oxygen × 522.64%
15.999 × 5 = 79.995 g/mol
S Sulfur × 19.07%
32.06 × 1 = 32.060 g/mol

Look up another formula

Compounds with the formula C18H11NO5S

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

Showing 1 to 16 of 16 compounds

Benzenesulfonic acid 1,3-dioxo-1H,3H-benzo[de]isoquinolin-2-yl ester

CAS 23928-87-2C₁₈H₁₁NO₅S

3-(1,3-Benzothiazol-2-yl)-7-hydroxy-8-methyl-4-oxo-4H-chromene-2-carboxylic acid

CAS 384364-63-0C₁₈H₁₁NO₅S

2-(2,3-Dihydro-1,3-dioxo-1H-inden-2-yl)-6-quinolinesulfonic acid

CAS 38615-45-1C₁₈H₁₁NO₅S

(5-(Thiophen-2-yl)isoxazol-3-yl)methyl 4-oxo-4H-chromene-2-carboxylate

CAS 946317-24-4C₁₈H₁₁NO₅S

[5-(Thiophen-2-yl)-1,2-oxazol-3-yl]methyl 2-oxo-2H-chromene-3-carboxylate

CAS 946346-19-6C₁₈H₁₁NO₅S

3-(4-Methylthiazol-2-yl)-2-oxo-2H-chromen-7-yl furan-2-carboxylate

CAS 391229-94-0C₁₈H₁₁NO₅S

2-(3-Benzothiazol-2-yl-2-oxochromen-7-yloxy)acetic acid

CAS 302551-90-2C₁₈H₁₁NO₅S

8-Quinolinesulfonic acid, 2-(2,3-dihydro-1,3-dioxo-1H-inden-2-yl)-

CAS 94803-31-3C₁₈H₁₁NO₅S

3-(2-Methyl-1,3-thiazol-4-yl)-2-oxo-2H-chromen-7-yl furan-2-carboxylate

CAS 1010922-49-2C₁₈H₁₁NO₅S

3-Benzoyl-4-hydroxy-5-(p-nitrobenzylidene)-2(5H)-thiophenone

CAS 10296-56-7C₁₈H₁₁NO₅S

4-(5-{(E)-[2,4-Dioxo-3-(prop-2-yn-1-yl)-1,3-thiazolidin-5-ylidene]methyl}furan-2-yl)benzoic acid

CAS 431926-17-9C₁₈H₁₁NO₅S

Quinolin-8-yl 2-oxo-2H-chromene-6-sulfonate

CAS 1386734-42-4C₁₈H₁₁NO₅S

1,3-Dioxo-2,3-dihydro-1H-isoindol-2-yl 5-(5-methylfuran-2-yl)thiophene-2-carboxylate

CAS 2248282-42-8C₁₈H₁₁NO₅S

1,3-Dioxo-2,3-dihydro-1H-isoindol-2-yl 6-methoxy-1-benzothiophene-2-carboxylate

CAS 2248315-73-1C₁₈H₁₁NO₅S

1,3-Dioxo-2,3-dihydro-1H-isoindol-2-yl 4-methoxy-1-benzothiophene-7-carboxylate

CAS 2248318-24-1C₁₈H₁₁NO₅S

2-(1-Hydroxy-3-oxoinden-2-yl)quinoline-8-sulfonic acid

CAS 83440-72-6C₁₈H₁₁NO₅S

Frequently asked questions

Still have a question?

The help centre explains buying, quotes and supplier badges step by step, or you can write to our team.

Help centre Contact us

What is the molar mass of C18H11NO5S?

The molar mass of C18H11NO5S is 353.35 g/mol, calculated from standard atomic weights for 18 carbon atoms, 11 hydrogen atoms, 1 nitrogen atom, 5 oxygen atoms and 1 sulfur atom. The monoisotopic mass is 353.0358 Da.

How many compounds have the formula C18H11NO5S?

CompoundList lists 16 compounds with the molecular formula C18H11NO5S, including Benzenesulfonic acid 1,3-dioxo-1H,3H-benzo[de]isoquinolin-2-yl ester, 3-(1,3-Benzothiazol-2-yl)-7-hydroxy-8-methyl-4-oxo-4H-chromene-2-carboxylic acid, 2-(2,3-Dihydro-1,3-dioxo-1H-inden-2-yl)-6-quinolinesulfonic acid. 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 C18H11NO5S?

C18H11NO5S has a degree of unsaturation of 14. 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.