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Chemical substance record

Ammonia

7664-41-7H3N17.031 g/mol

An azane that consists of a single nitrogen atom covelently bonded to three hydrogen atoms. — ChEBI

Safety references

Safety documents & references

2 indexed references
US · NIOSH

Occupational chemical safety guide

Ammonia

Read official guide
JP · NITE

Government GHS classification

R06-C-103-JNIOSH · FY2024

View classification

Find a product-specific SDS

Safety guides and government classification records are not a manufacturer’s SDS. Match supplier, product number, concentration, physical form, region and revision before using a document.

Identity & molecular properties

Source-linked values
CAS number7664-41-7ChEBI ↗
Molecular formulaH3NChEBI ↗
Molar mass17.031 g/molChEBI ↗
Monoisotopic mass17.02655 DaChEBI ↗
Formal charge0ChEBI ↗
ChEBI identifierCHEBI:16134ChEBI ↗

Cross-source molecular data

PubChem
Molar mass17.031 g/molPubChem ↗
Exact mass17.026549100 DaPubChem ↗

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 identifier
ammonia
ammonia
QGZKDVFQNNGYKY-UHFFFAOYSA-N
[H]N([H])[H]
InChI=1S/H3N/h1H3

Names & synonyms

azane

Names are supplied by ChEBI. Trade names and related synonyms may describe a broader product context.

Classification & relationships

ChEBI ontology

Roles recorded in ChEBI

NMR chemical shift reference compoundmetaboliteneurotoxinnucleophilic reagentmouse metaboliteEC 3.5.1.4 (amidase) inhibitorrefrigerant

Database role annotations describe reported biological or chemical roles; they are not product approvals or recommendations for use.

Safety classification · Japan

NITE / Japanese government
Japan · FY2024 source classification
Ammonia · R06-C-103-JNIOSH

Selected source-reported endpoints. Other endpoints, rationales and conditions remain in the original classification. Missing or unlisted information does not mean non-hazardous. This is not a global classification or transport decision.

Read the original NITE classification

Mass ↔ amount of substance

Calculated from sourced mass
Equivalent amount
0.0587165 mol

Uses 17.031 g/mol from ChEBI. Assumes the substance described by this record; no purity or concentration correction is applied.

Elemental composition

Theoretical mass fractions
N
Nitrogen · 1 atom
82.24%
H
Hydrogen · 3 atoms
17.76%

Calculated theoretical mass fractions from the reported formula and PubChem periodic-table atomic masses. These are not assay or purity results.

Research & patent references

Selected source associations
Diagnosis and treatment of hepatic encephalopathy. ↗Bailliere's best practice & research. Clinical gastroenterology · 2000 Dec · PMID 11139349

Sources & record history

Checked 27 Sep 2026
EMBL-EBI ChEBI · CHEBI:16134

Release 255, 9 September 2026. ChEBI three-star (manually annotated) source entry. View original record ↗ · CC BY 4.0

NCBI PubChem · CID 222 · retrieved 2026-09-27

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.