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Chemical product profile

HONGKUN / PRODUCT DIRECTORY

Methylenediphosphonic acid (Medronic acid) | CAS 1984-15-2

A P–C–P bisphosphonic acid for metal-binding and surface-chemistry applications, with phosphorus-species identity, metal background and acid-versus-salt form central to qualification.

CAS1984-15-2
Molecular formulaCH6O6P2
Molecular weight176 g/mol

Product overview

Medronic acid places two phosphonic acid groups on a single methylene carbon. Its P–C–P framework differs from the P–O–P linkage of pyrophosphate, and the free acid differs from its sodium salts. The compound is nonradioactive; radiolabelled medronate formulations are separate materials. Procurement should define the required acid form and establish phosphorus-related impurities and background metals relevant to complexation work.

Chemical identity

Chemical name
Methylenediphosphonic acid (Medronic acid)
CAS number
1984-15-2
Molecular formula
CH6O6P2
Molecular weight
176 g/mol

Application context

Medronic acid has a documented role as the ligand framework in technetium-99m medronate chemistry. Separate research contexts include calcium-related biochemical studies and modification of titanium surfaces. Across these uses, metal binding and interaction with mineral or metal-containing systems guide material selection. A free-acid reagent lot should be assessed for the intended experimental or manufacturing step; a ready-to-use radiopharmaceutical has additional composition, preparation and release requirements.

Chemistry and synthetic role

Two phosphonic acid groups provide multiple oxygen donor sites, while the connecting methylene establishes a bisphosphonate rather than a phosphate anhydride.

Quality review

Phosphorus profile

Consider phosphorus NMR or another suitable method to distinguish the intended bisphosphonate from inorganic phosphorus species.

Background metals

Specify relevant metals when they could occupy binding sites or affect complexation measurements.

Acid and counterions

Confirm free acid, assay basis and water; quantify counterions when salt contamination is relevant.

Preparing a specification

State free medronic acid identity, assay and water basis, phosphorus-related-substance controls and metal-background limits suited to the binding application.

Packaging and storage

Confirm container compatibility, closure and net weight for the selected grade and destination. Follow the actual supplier SDS and batch label for storage and transport.

Documentation

Request the batch COA, SDS and analytical methods covering the agreed purchasing specification. Confirm which supporting chromatograms and application-specific records are available from the selected manufacturer.

Procurement questions

Is this material radioactive?

No. Medronic acid itself is a nonradioactive ligand precursor.

Is it pyrophosphate?

No. Its phosphorus atoms are linked through carbon, not oxygen.

Can sodium medronate replace the acid by equal weight?

Counterion content and molecular mass must be included in the calculation.

Technical sources
  1. PubChem CAS identity lookupNCBI / PubChem
  2. Medronic acidPubChem / NCI
  3. Methylenediphosphonic acid product informationSigma-Aldrich