Skip to content
[P]pubcas
Independent chemical reference Compare
Chemical substance record

Phosphane

7803-51-2H3P33.998 g/mol

The simplest phosphine, consisting of a single phosphorus atom with three hydrogens attached. — ChEBI

Safety references

Safety documents & references

2 indexed references
US · NIOSH

Occupational chemical safety guide

Phosphine

Read official guide
JP · NITE

Government GHS classification

R04-C-062-JNIOSH, MOE · FY2022

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 number7803-51-2ChEBI ↗
Molecular formulaH3PChEBI ↗
Molar mass33.998 g/molChEBI ↗
Monoisotopic mass33.99724 DaChEBI ↗
Formal charge0ChEBI ↗
ChEBI identifierCHEBI:30278ChEBI ↗

Cross-source molecular data

PubChem
Molar mass33.998 g/molPubChem ↗
Exact mass33.997237093 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
phosphane
phosphane
XYFCBTPGUUZFHI-UHFFFAOYSA-N
[H]P([H])[H]
InChI=1S/H3P/h1H3

Names & synonyms

phosphorus trihydridetrihydridophosphorus

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

Classification & relationships

ChEBI ontology

Roles recorded in ChEBI

fumigant insecticidecarcinogenic agent

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 · FY2022 source classification
Phosphine · R04-C-062-JNIOSH, MOE

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
0.0294135 mol

Uses 33.998 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 · 1 atom
91.11%
H
Hydrogen · 3 atoms
8.89%

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

Sources & record history

Checked 27 Sep 2026
EMBL-EBI ChEBI · CHEBI:30278

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

NCBI PubChem · CID 24404 · 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.