Diammonium hydrogen phosphate

CAS 7783-28-0  ·  H₉N₂O₄P  ·  MW 132.06 g/mol

Loading molecule...
3D model Diammonium hydrogen phosphate, CAS 7783-28-0, molecular formula H₉N₂O₄P, molar mass 132.06 g/mol
About Diammonium hydrogen phosphate

Diammonium hydrogen phosphate is a chemical compound registered under number CAS 7783-28-0, with the molecular formula H₉N₂O₄P, and a molar mass of 132.06 g/mol.

The molecule contains 16 atoms connected by 13 chemical bonds. The full systematic IUPAC name of this compound is diazanium;hydrogen phosphate. The interactive 3D model above lets you view the spatial arrangement of the atoms — you can rotate it with the mouse, zoom with the scroll wheel, and switch between skeletal / Ball & Stick / Space Fill visualization modes.

In terms of physicochemical properties, polar surface area PSA = 85.4 Ų, 3 donors and 4 hydrogen bond acceptors. These parameters are key when assessing bioavailability and interaction with biomolecules.

Chemical data for this compound comes from PubChem (NIH NLM NCBI), one of the world's largest chemical databases. All information is updated automatically and enriched with GHS hazard statement translations compliant with the CLP Regulation (EC 1272/2008). The widget above may be used for educational, research and commercial purposes.

Physicochemical properties
Molecular formulaH₉N₂O₄P
Molar mass132.06 g/mol
IUPACdiazanium;hydrogen phosphate
SMILES[NH4+].[NH4+].OP(=O)([O-])[O-]
InChIKeyMNNHAPBLZZVQHP-UHFFFAOYSA-N
logP (XLogP3)—
PSA85.4 Ų
HBD / HBA3 / 4
PubChem CIDCID 24540 ↗
GHS safety

Signal word: Warning

GHS07
GHS07
Scientific literature

Related literature

1 articles · 1 open access · Sources: PubMed, OpenAlex, Semantic Scholar

Filters:Export:📄 BibTeX📑 RIS📋 EndNote🔧 CSL-JSON

Data from PubMed (NIH NLM), OpenAlex (CC0), Semantic Scholar (AI2). AI Summary generated by Semantic Scholar TLDR. Articles marked with require paid access.

Synonyms
7783-28-0 · Diammonium hydrogen phosphate · DIAMMONIUM PHOSPHATE · Ammonium phosphate dibasic · Phosphoric acid, diammonium salt · Akoustan A · Pelor · Coaltrol LPA 445 · Diammonium orthophosphate · Diammonium acid phosphate · K2 (phosphate) · Diammonium hydrogen orthophosphate · Secondary ammonium phosphate · Hydrogen diammonium phosphate · Ammonium orthophosphate dibasic
Data sources
Related molecules
📜 License & provenancePREDICTED MODEL · NOT VERIFIEDMolGod_License_1
PREDICTED MODEL — NOT VERIFIED
computed by MolGod Scientific · experimental feature (beta) · may contain errors
ILLUSTRATIVE FRAGMENT ARRANGEMENT — relative positions are not structural data

No source 3-D conformer was available to MolGod for this substance. MolGod Scientific computed this geometry from the structural formula with RDKit 2026.03.6 (ETKDGv3 conformer generation, MMFF94 force-field optimisation; lowest-energy converged conformer of a fixed-seed set). It is not a measured structure, it does not come from PubChem, and it has not been compared with experimental data. It shows one possible conformation.

This substance consists of 3 separate components (for example ions). Each component was computed separately; they are arranged radially around a layout anchor for visualisation only (at least 3.0 Å apart). Their relative positions are not a crystal structure, coordination geometry, ionic contacts or any experimentally determined arrangement.

Methods and references
  1. RDKit: Open-source cheminformatics, version 2026.03.6. Zenodo. doi:10.5281/zenodo.22140358 (all versions: doi:10.5281/zenodo.591637)
  2. Riniker S, Landrum GA. Better Informed Distance Geometry: Using What We Know To Improve Conformation Generation. J. Chem. Inf. Model. 2015, 55, 2562-2574. doi:10.1021/acs.jcim.5b00654
  3. Wang S, Witek J, Landrum GA, Riniker S. Improving Conformer Generation for Small Rings and Macrocycles Based on Distance Geometry and Experimental Torsional-Angle Preferences. J. Chem. Inf. Model. 2020, 60, 2044-2058. doi:10.1021/acs.jcim.0c00025
  4. Halgren TA. Merck molecular force field. I. Basis, form, scope, parameterization, and performance of MMFF94. J. Comput. Chem. 1996, 17, 490-519. doi:10.1002/(SICI)1096-987X(199604)17:5/6<490::AID-JCC1>3.0.CO;2-P
  5. Tosco P, Stiefl N, Landrum G. Bringing the MMFF force field to the RDKit: implementation and validation. J. Cheminform. 2014, 6, 37. doi:10.1186/s13321-014-0037-3
  6. Heller SR, McNaught A, Pletnev I, Stein S, Tchekhovskoi D. InChI, the IUPAC International Chemical Identifier. J. Cheminform. 2015, 7, 23. doi:10.1186/s13321-015-0068-4
  7. Kim S, Chen J, Cheng T, et al. PubChem 2025 update. Nucleic Acids Res. 2025, 53, D1516-D1525. doi:10.1093/nar/gkae1059 Compound record: https://pubchem.ncbi.nlm.nih.gov/compound/24540
  8. Bolton EE, Kim S, Bryant SH. PubChem3D: Conformer generation. J. Cheminform. 2011, 3, 4. doi:10.1186/1758-2946-3-4 (cited for contrast: no source 3-D conformer was available to MolGod for this record)
Diammonium hydrogen phosphate (CAS 7783-28-0), H₉N₂O₄P - 3D ball-and-stick molecular model, engraved element symbols (H N O P), MolGod STL previewDownload image

MG-STL-7783-28-0-ENGRAVED · 191,322 △ · 9 MB · SHA-256 d5fe110c74422a55

Download 3D model · ENGRAVED · H N O P

Diammonium hydrogen phosphate (CAS 7783-28-0), H₉N₂O₄P - 3D ball-and-stick molecular model, MolGod STL previewDownload image

MG-STL-7783-28-0-NORMAL · 6,464 △ · 316 KB · SHA-256 5da0e60796119b2d

Download 3D model

Model
Diammonium hydrogen phosphate · 7783-28-0
InChIKey
MNNHAPBLZZVQHP-UHFFFAOYSA-N
License
CC BY-SA 4.0 International (source rights undetermined — not yet granted)
Attribution
MolGod Scientific — Diammonium hydrogen phosphate (CAS 7783-28-0)
License & provenance record
Diammonium hydrogen phosphate (CAS 7783-28-0) →
MolGod molecule record
Diammonium hydrogen phosphate →
Source data
PubChem CID 24540 ↗
Model information
STL generated by MolGod · MolGod STL Exporter build 48804cd20b0d · generated 2026-10-14
SHA-256 (STL)
5da0e60796119b2de2f342f5d2e46d6902530beef655a773cb359f3c46a691e2
MD5 (STL)
86dcc400ae2ed0f6353893d6f610c555
Model identifier
MG-STL-7783-28-0
Transformation
MolGod Scientific ball-and-stick mesh
Changes
PREDICTED geometry computed by MolGod Scientific (RDKit), NOT verified; rendered as a triangulated mesh.
Wikimedia Commons
not published yet

This license applies to the MolGod-created STL mesh, not automatically to third-party source material.

—