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Molecular formula

C5H5N5O

124 compounds have this formula on CompoundList.

Molar mass
151.13g/mol
Monoisotopic mass
161.0514Da
Atoms
16
Elements
4
Rings plus double bonds
6

The formula C5H5N5O describes a molecule made of 5 carbon atoms, 5 hydrogen atoms, 5 nitrogen atoms and 1 oxygen 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 × 539.74%
    12.011 × 5 = 60.055 g/mol
  • H Hydrogen × 53.33%
    1.008 × 5 = 5.040 g/mol
  • N Nitrogen × 546.34%
    14.007 × 5 = 70.035 g/mol
  • O Oxygen × 110.59%
    15.999 × 1 = 15.999 g/mol
Look up another formula

Compounds with the formula C5H5N5O

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

Showing 101 to 124 of 124 compounds

2-Amino-8H-purin-6-ol chemical structure, C5H5N5O, CAS 914452-01-0
2-Amino-8H-purin-6-ol
CAS 914452-01-0C5H5N5O
5-(1H-Pyrazol-4-yl)-1,3,4-oxadiazol-2-amine chemical structure, C5H5N5O, CAS 1342882-94-3
5-(1H-Pyrazol-4-yl)-1,3,4-oxadiazol-2-amine
CAS 1342882-94-3C5H5N5O
Guanine-4,8-13C2,7-15N chemical structure, C5H5N5O, CAS 1246814-70-9
Guanine-4,8-13C2,7-15N
CAS 1246814-70-9C5H5N5O
(6-Amino-4-oxo-4,5-dihydropyrimidin-2-yl)cyanamide chemical structure, C5H5N5O, CAS 86248-14-8
(6-Amino-4-oxo-4,5-dihydropyrimidin-2-yl)cyanamide
CAS 86248-14-8C5H5N5O
2,4-Diimino-6-oxohexahydropyrimidine-5-carbonitrile chemical structure, C5H5N5O, CAS 98024-74-9
2,4-Diimino-6-oxohexahydropyrimidine-5-carbonitrile
CAS 98024-74-9C5H5N5O
6-Amino-1,2-dihydropyrazolo[3,4-d]pyrimidin-3-one chemical structure, C5H5N5O, CAS 128850-57-7
6-Amino-1,2-dihydropyrazolo[3,4-d]pyrimidin-3-one
CAS 128850-57-7C5H5N5O
5-(1-Isocyanatocyclopropyl)-1H-1,2,3,4-tetrazole chemical structure, C5H5N5O, CAS 2649082-83-5
5-(1-Isocyanatocyclopropyl)-1H-1,2,3,4-tetrazole
CAS 2649082-83-5C5H5N5O
3-(1H-1,2,4-Triazol-3-yl)-1,2-oxazol-5-amine chemical structure, C5H5N5O, CAS 2228481-08-9
3-(1H-1,2,4-Triazol-3-yl)-1,2-oxazol-5-amine
CAS 2228481-08-9C5H5N5O
5-(1H-1,2,4-Triazol-3-yl)-1,2-oxazol-3-amine chemical structure, C5H5N5O, CAS 2228699-08-7
5-(1H-1,2,4-Triazol-3-yl)-1,2-oxazol-3-amine
CAS 2228699-08-7C5H5N5O
5-(1H-1,2,4-Triazol-3-yl)-1,2-oxazol-4-amine chemical structure, C5H5N5O, CAS 2228920-85-0
5-(1H-1,2,4-Triazol-3-yl)-1,2-oxazol-4-amine
CAS 2228920-85-0C5H5N5O
5-(1H-1,2,4-Triazol-3-yl)-1,3-oxazol-2-amine chemical structure, C5H5N5O, CAS 2229369-46-2
5-(1H-1,2,4-Triazol-3-yl)-1,3-oxazol-2-amine
CAS 2229369-46-2C5H5N5O
2-(Prop-2-yn-1-yl)-2H-1,2,3,4-tetrazole-5-carboxamide chemical structure, C5H5N5O, CAS 2870660-02-7
2-(Prop-2-yn-1-yl)-2H-1,2,3,4-tetrazole-5-carboxamide
CAS 2870660-02-7C5H5N5O
4-(Cyanomethyl)-1H-1,2,3-triazole-5-carboxamide chemical structure, C5H5N5O, CAS 73591-49-8
4-(Cyanomethyl)-1H-1,2,3-triazole-5-carboxamide
CAS 73591-49-8C5H5N5O
1-(1H-[1,2,4]Triazolo[4,3-b][1,2,4]triazol-1-yl)ethanone chemical structure, C5H5N5O, CAS 56424-48-7
1-(1H-[1,2,4]Triazolo[4,3-b][1,2,4]triazol-1-yl)ethanone
CAS 56424-48-7C5H5N5O
1-Methyl-1H-pyrazolo[4,3-e][1,2,4]triazin-3(2H)-one chemical structure, C5H5N5O, CAS 888490-32-2
1-Methyl-1H-pyrazolo[4,3-e][1,2,4]triazin-3(2H)-one
CAS 888490-32-2C5H5N5O
2-Methyl-1H-pyrazolo[4,3-e][1,2,4]triazin-3(2H)-one chemical structure, C5H5N5O, CAS 888490-29-7
2-Methyl-1H-pyrazolo[4,3-e][1,2,4]triazin-3(2H)-one
CAS 888490-29-7C5H5N5O
N-(Pyrazolo[1,5-a][1,3,5]triazin-4-yl)hydroxylamine chemical structure, C5H5N5O, CAS 71774-62-4
N-(Pyrazolo[1,5-a][1,3,5]triazin-4-yl)hydroxylamine
CAS 71774-62-4C5H5N5O
5,6-Diamino-2-hydroxypyrimidine-4-carbonitrile chemical structure, C5H5N5O, CAS 79157-00-9
5,6-Diamino-2-hydroxypyrimidine-4-carbonitrile
CAS 79157-00-9C5H5N5O
6-Amino-[1,2,4]triazolo[4,3-b]pyridazin-8-ol chemical structure, C5H5N5O, CAS 32002-29-2
6-Amino-[1,2,4]triazolo[4,3-b]pyridazin-8-ol
CAS 32002-29-2C5H5N5O
Guanine-4,5-13C2,7-15N chemical structure, C5H5N5O, CAS 1207525-05-0
Guanine-4,5-13C2,7-15N
CAS 1207525-05-0C5H5N5O
5-Methyl-[1,2,4]triazolo[4,3-a][1,3,5]triazin-7(1H)-one chemical structure, C5H5N5O, CAS 200350-23-8
5-Methyl-[1,2,4]triazolo[4,3-a][1,3,5]triazin-7(1H)-one
CAS 200350-23-8C5H5N5O
5-Amino-3H-pyrazolo[5,1-f][1,2,4]triazin-4-one chemical structure, C5H5N5O, CAS 2940956-64-7
5-Amino-3H-pyrazolo[5,1-f][1,2,4]triazin-4-one
CAS 2940956-64-7C5H5N5O
4-Amino-1,6-dihydropyrazolo[3,4-d]pyridazin-7-one chemical structure, C5H5N5O, CAS 2762044-80-2
4-Amino-1,6-dihydropyrazolo[3,4-d]pyridazin-7-one
CAS 2762044-80-2C5H5N5O
N-([1,2,4]Triazolo[1,5-a]pyrazin-8-yl)hydroxylamine chemical structure, C5H5N5O, CAS 55366-17-1
N-([1,2,4]Triazolo[1,5-a]pyrazin-8-yl)hydroxylamine
CAS 55366-17-1C5H5N5O

Frequently asked questions

What is the molar mass of C5H5N5O?

The molar mass of C5H5N5O is 151.13 g/mol, calculated from standard atomic weights for 5 carbon atoms, 5 hydrogen atoms, 5 nitrogen atoms and 1 oxygen atom. The monoisotopic mass is 161.0514 Da.

How many compounds have the formula C5H5N5O?

CompoundList lists 124 compounds with the molecular formula C5H5N5O, including 2-Amino-8H-purin-6-ol, 5-(1H-Pyrazol-4-yl)-1,3,4-oxadiazol-2-amine, Guanine-4,8-13C2,7-15N. 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 C5H5N5O?

C5H5N5O has a degree of unsaturation of 6. 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.