Chemical substance record

1,3,5,2,4,6-triazatriphosphinine

291-37-2N₃P₃134.943 g/mol

Organic/Inorganic Small MoleculeChEBI source record

An inorganic heteromonocyclic compound that is 1,3,5-triazine in which the carbon atoms have been replaced by phosphorus atoms. It was one of a series of compounds which was being developed for use as a fire-resistant hydraulic fluid. — ChEBI

Safety references

Safety documents & references

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Identity & molecular properties

Source-linked values

CAS number	291-37-2	ChEBI ↗
Molecular formula	N₃P₃	ChEBI ↗
Molar mass	134.943 g/mol	ChEBI ↗
Monoisotopic mass	134.93051 Da	ChEBI ↗
Formal charge	0	ChEBI ↗
ChEBI identifier	CHEBI:167642	ChEBI ↗

Cross-source molecular data

PubChem

Molar mass	134.942 g/mol	PubChem ↗
Exact mass	134.93050801 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

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Source preferred name

1,3,5,2,4,6-triazatriphosphinine

IUPAC name

1,3,5,2,4,6-triazatriphosphinine

InChIKey

DZKXDEWNLDOXQH-UHFFFAOYSA-N

SMILES

n1pnpnp1

InChI

InChI=1S/N3P3/c1-4-2-6-3-5-1

Classification & relationships

ChEBI ontology

inorganic heteromonocyclic compoundChEBI parent class · 167643 ↗phosphorus molecular entityChEBI parent class · 26082 ↗inorganic aromatic compoundChEBI parent class · 33660 ↗nitrogen molecular entityChEBI parent class · 51143 ↗

Mass ↔ amount of substance

Calculated from sourced mass

Amount

Input unit

Equivalent amount

0.00741054 mol

Uses 134.943 g/mol from ChEBI. Assumes the substance described by this record; no purity or concentration correction is applied.

Elemental composition

Theoretical mass fractions

P

Phosphorus · 3 atoms

68.86%

N

Nitrogen · 3 atoms

31.14%

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

A macromolecular prodrug of doxorubicin conjugated to a biodegradable cyclotriphosphazene bearing a tetrapeptide. ↗Bioorganic & medicinal chemistry letters · 2005 Aug 1 · PMID 15982876

Determination of the toxicity of cyclotriphosphazene hydraulic fluid by 21-day repeated inhalation and dermal exposure. ↗American Industrial Hygiene Association journal · 1990 Nov · PMID 2085163

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Sources & record history

Checked 27 Sep 2026

Identity, formula, mass, synonyms & ontologyEMBL-EBI ChEBI · CHEBI:167642

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

Additional molecular descriptorsNCBI PubChem · CID 120195 · 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.

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