Indicator Explainer
Ammonia
An inorganic compound composed of a single nitrogen atom covalently bonded to three hydrogen atoms that is an amidase inhibitor and neurotoxin. It is both manufactured and produced naturally from bacterial processes and the breakdown of organic matter. Ammonia is used in many industrial processes, and as a fertilizer and refrigerant. It is characterized as a colorless gas or compressed liquid with a pungent odor and exposure occurs by inhalation, ingestion, or contact.
This page explains what the indicator is and how results are interpreted in general terms. Reference ranges depend on the laboratory, the method, and your own situation — no single “normal value” applies to everyone. This page is health information, not a diagnosis. For symptoms, treatment, or urgent concerns, contact a healthcare professional.
When it is tested
Source: National Cancer Institute, NCI Thesaurus 26.09d, C76698. NCI definition, reproduced without modification under CC BY 4.0. Source identity and definition checked automatically on 2026-10-18. No individual clinical interpretation or human reviewer is asserted.
Reading results
Reference intervals and interpretation depend on the laboratory, specimen, method and clinical context. This source definition is educational information; it does not establish a diagnosis, product approval or suitability for an individual.
Also Known As
References
- NCI Thesaurus 26.09d — Ammonia (C76698)
- Source: National Cancer Institute, NCI Thesaurus 26.09d, C76698. NCI definition, reproduced without modification under CC BY 4.0.
- Controlled Hydrogen Delivery by Single-Atom Ru Accelerates Electrocatalytic Ammonia Synthesis. — Angew Chem Int Ed Engl, 2026-10-10 (PMID 42856087; literature)
- Mitigation strategies for ammonia inhibition and coupled regulation of operational parameters in high-solids anaerobic digestion of chicken manure: A critical review. — Bioresour Technol, 2026-10-08 (PMID 42849628; literature)
- Modeling atmospheric dispersion of ammonia over water and implications for in-water fate and trajectory. — Mar Pollut Bull, 2026-10-08 (PMID 42849101; literature)
- Evolution of dipole-dipole dynamics in cold ammonia collisions. — Nat Chem, 2026-10-07 (PMID 42844377; literature)
- Synergistic Effect of MOF-Derived Porous In2O3 and High-Entropy Alloy for Enhanced Room-Temperature Ammonia Sensing. — ACS Sens, 2026-10-07 (PMID 42842638; literature)
- Carbon nitride immobilized on a reusable 3D-printed support for sustainable visible-light-driven ammonia synthesis. — Photochem Photobiol Sci, 2026-10-15 (PMID 42879003; literature)
- Coordination-Asymmetry-Regulated Reconstruction of Electron-Rich Cu Sites for pH-Dependent Nitrate-to-Ammonia Electrocatalysis. — Adv Sci (Weinh), 2026-10-14 (PMID 42875820; literature)
- Serum ammonia improves early risk stratification beyond West Haven criteria in acute liver failure. — Liver Transpl, 2026-10-23 (PMID 42912570; literature)
- Texturing Behavior-Empowered PANI-Wrapping C-Fe2O3 Hierarchical Microarchitectures for Wearable Ammonia and Pressure Sensing. — ACS Sens, 2026-10-23 (PMID 42912456; literature)
- Carbon dots enhance biofilm-electrode electron transfer for nitrite-independent ammonia oxidation. — Bioresour Technol, 2026-10-28 (PMID 42951148; literature)
- Sodium propionate alleviates ammonia toxicity by enhancing intestinal ammonia capture by α-ketoglutarate in yellow catfish (Pelteobagrus fulvidraco) under chronic ammonia stress. — Comp Biochem Physiol C Toxicol Pharmacol, 2026-10-27 (PMID 42946150; literature)