Beryllium difluoride
The fluoride salt of beryllium (+2 oxidation state). In the solid state it exists as a glass, with four-coordinate Be2+ tetrahedral centres and two-coordinate fluoride centres. As a gas it adopts a linear triatomic structure and in the liquid state a fluctuating tetrahedral structure. In protein crystallography it is used as a mimic of phosphate. — ChEBI
Safety documents & references
1 indexed referencesFind 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 number | 7787-49-7 | ChEBI ↗ |
| Molecular formula | BeF2 | ChEBI ↗ |
| Molar mass | 47.008 g/mol | ChEBI ↗ |
| Monoisotopic mass | 47.00899 Da | ChEBI ↗ |
| Formal charge | 0 | ChEBI ↗ |
| ChEBI identifier | CHEBI:49499 | ChEBI ↗ |
Cross-source molecular data
PubChem| Molar mass | 47.008989 g/mol | PubChem ↗ |
| Exact mass | 47.0089894 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
Copy any identifierberyllium difluorideberyllium difluorideJZKFIPKXQBZXMW-UHFFFAOYSA-L[F][Be][F]InChI=1S/Be.2FH/h;2*1H/q+2;;/p-2Classification & relationships
ChEBI ontologySafety classification · Japan
NITE / Japanese governmentBeryllium fluoride · 484
| Endpoint | Reported classification |
|---|---|
| Acute toxicity （Oral） | Category 3 |
| Skin corrosion/irritation | Category 2 |
| Serious eye damage/eye irritation | Category 2A |
| Skin sensitization | Category 1 |
| Carcinogenicity | Category 1A |
| Specific target organ toxicity - Single exposure | Category 3 （Respiratory tract irritation） |
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 classificationMass ↔ amount of substance
Calculated from sourced massUses 47.008 g/mol from ChEBI. Assumes the substance described by this record; no purity or concentration correction is applied.
Elemental composition
Theoretical mass fractionsFBeCalculated 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 associationsSources & record history
Checked 27 Sep 2026Release 255, 9 September 2026. ChEBI three-star (manually annotated) source entry. View original record ↗ · CC BY 4.0
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.