Molecular formula

C₂₁H₁₃NO₄

28 compounds have this formula on CompoundList.

Molar mass: 343.34g/mol
Monoisotopic mass: 343.0845Da
Atoms: 39
Elements: 4
Rings plus double bonds: 16

The formula C21H13NO4 describes a molecule made of 21 carbon atoms, 13 hydrogen atoms, 1 nitrogen atom and 4 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 × 2173.46%
12.011 × 21 = 252.231 g/mol
H Hydrogen × 133.82%
1.008 × 13 = 13.104 g/mol
N Nitrogen × 14.08%
14.007 × 1 = 14.007 g/mol
O Oxygen × 418.64%
15.999 × 4 = 63.996 g/mol

Look up another formula

Compounds with the formula C21H13NO4

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

Showing 1 to 28 of 28 compounds

Red Violet 2RN Acid Anthraquinone

CAS 81-79-8C₂₁H₁₃NO₄

4-(5,7-Dioxo-5,7-dihydro-6H-dibenzo[c,e]azepin-6-yl)benzoic acid

CAS 312595-55-4C₂₁H₁₃NO₄

[(2Z)-3-Oxo-2-(pyridin-4-ylmethylidene)-1-benzofuran-6-yl] benzoate

CAS 1164461-89-5C₂₁H₁₃NO₄

2-(2-Biphenylyl)-1,3-dioxo-5-isoindolinecarboxylic acid

CAS 518023-83-1C₂₁H₁₃NO₄

3-(9-Oxo-9H-fluorene-1-carboxamido)benzoic acid

CAS 304894-91-5C₂₁H₁₃NO₄

2-[(9-Oxo-9H-fluoren-2-yl)carbamoyl]benzoic acid

CAS 5411-64-3C₂₁H₁₃NO₄

6-(1,3-Benzodioxol-5-yl)benzo[d][2]benzazepine-5,7-dione

CAS 496913-57-6C₂₁H₁₃NO₄

2-Naphtho[2,3-d][1,3]dioxol-6-yl-4-quinolinecarboxylic acid

CAS 500576-35-2C₂₁H₁₃NO₄

4-Oxo-2-phenylchromen-3-yl pyridine-3-carboxylate

CAS 681477-34-9C₂₁H₁₃NO₄

N-Anthraquinonyl-1-anthranilic acid

CAS 19795-96-1C₂₁H₁₃NO₄

RefChem:388713

CAS 5630-97-7C₂₁H₁₃NO₄

Benzamide, N-(9,10-dihydro-4-hydroxy-9,10-dioxo-1-anthracenyl)-

CAS 6409-74-1C₂₁H₁₃NO₄

3-(1,3-Dioxo-1,3,6,7-tetrahydro-2H-indeno[6,7,1-def]isoquinolin-2-yl)benzoic acid

CAS 423729-46-8C₂₁H₁₃NO₄

3-(5,7-Dioxo-5,7-dihydro-6H-dibenzo[c,e]azepin-6-yl)benzoic acid

CAS 312289-66-0C₂₁H₁₃NO₄

5-Benzoyl-2-(4-hydroxyphenyl)isoindole-1,3-dione

CAS 331269-96-6C₂₁H₁₃NO₄

(Z)-3-Oxo-2-(pyridin-3-ylmethylene)-2,3-dihydrobenzofuran-6-yl benzoate

CAS 622361-35-7C₂₁H₁₃NO₄

5-Hydroxy-3-(p-tolyloxy)-6H-anthra[1,9-cd]isoxazol-6-one

CAS 76469-58-4C₂₁H₁₃NO₄

2,5-Dioxopyrrolidin-1-yl pyrene-1-carboxylate

CAS 204705-13-5C₂₁H₁₃NO₄

7-Hydroxy-3-methyl-14H-naphtho[3,2-a]phenoxazine-8,13-dione

CAS 94988-63-3C₂₁H₁₃NO₄

1,1'-(Pyridine-2,6-diyl)bis(phenylethane-1,2-dione)

CAS 67534-57-0C₂₁H₁₃NO₄

5'-Cyano-[1,1':3',1''-terphenyl]-4,4''-dicarboxylic acid

CAS 1159596-08-3C₂₁H₁₃NO₄

2-Oxo-4-phenyl-2H-1-benzopyran-7-yl pyridine-3-carboxylate

CAS 64836-32-4C₂₁H₁₃NO₄

5,5'-(Pyridine-3,5-diyl)diisophthalaldehyde

CAS 2459652-62-9C₂₁H₁₃NO₄

1,3-Dioxo-2,3-dihydro-1H-isoindol-2-yl 4-phenylbenzoate

CAS 404864-03-5C₂₁H₁₃NO₄

Frequently asked questions

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What is the molar mass of C21H13NO4?

The molar mass of C21H13NO4 is 343.34 g/mol, calculated from standard atomic weights for 21 carbon atoms, 13 hydrogen atoms, 1 nitrogen atom and 4 oxygen atoms. The monoisotopic mass is 343.0845 Da.

How many compounds have the formula C21H13NO4?

CompoundList lists 28 compounds with the molecular formula C21H13NO4, including Red Violet 2RN Acid Anthraquinone, 4-(5,7-Dioxo-5,7-dihydro-6H-dibenzo[c,e]azepin-6-yl)benzoic acid, [(2Z)-3-Oxo-2-(pyridin-4-ylmethylidene)-1-benzofuran-6-yl] benzoate. 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 C21H13NO4?

C21H13NO4 has a degree of unsaturation of 16. 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.