Ammonia-(13)N
A 13N-modified compound that is ammonia that has a 13N isotope as the nitrogen atom. 13N decays with a half-life of ten minutes to 13C, emitting a positron. Used in diagnostic Positron Emission Tomography (PET) imaging. — ChEBI
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Identity & molecular properties
Source-linked values| CAS number | 34819-78-8 | ChEBI ↗ |
| Molecular formula | H3 | ChEBI ↗ |
| Molar mass | 16.03 g/mol | ChEBI ↗ |
| Monoisotopic mass | 16.02921 Da | ChEBI ↗ |
| Formal charge | 0 | ChEBI ↗ |
| ChEBI identifier | CHEBI:135980 | ChEBI ↗ |
Cross-source molecular data
PubChem| Molar mass | 16.030 g/mol | PubChem ↗ |
| Exact mass | 16.029214 Da | PubChem ↗ |
PubChem computed values are shown separately from the ChEBI record. An exact InChIKey match was used to connect the records. Molecular descriptors do not describe a supplied product’s purity, particle size or performance.
Names & structural identifiers
Copy any identifierammonia-(13)NazaneQGZKDVFQNNGYKY-BJUDXGSMSA-N[H][13N]([H])[H]InChI=1S/H3N/h1H3/i1-1Classification & relationships
ChEBI ontologyRoles recorded in ChEBI
Database role annotations describe reported biological or chemical roles; they are not product approvals or recommendations for use.
Mass ↔ amount of substance
Calculated from sourced massUses 16.03 g/mol from ChEBI. Assumes the substance described by this record; no purity or concentration correction is applied.
Research & patent references
Selected source associationsSources & record history
Checked 27 Sep 2026Release 255, 9 September 2026. ChEBI three-star (manually annotated) source entry. View original record ↗ · CC BY 4.0
PubCAS formats source data, connects references and computes explicitly labelled conversions. CAS cross-references are supplied by ChEBI; they do not constitute CAS verification or endorsement.