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Pamidronic acid

Drug ingredient

CAS 40391-99-9

This chemical is an active pharmaceutical ingredient used in FDA-regulated drugs.

Molecular structure of 40391-99-9
US productionNot reported
Import value, 2024$598M
Top sourceChina 89%

This chemical is not on EPA’s Toxic Substances Control Act inventory, the list behind EPA’s production survey.

Why supply is unknown

Production is reported production, not a complete census of factories. Import value and source-country shares describe a shared customs category, not a separate chemical measurement.

Where It Comes From

Customs basis: HS 293149 · basket

These shares come from HS customs code 293149, which covers 114 tracked chemicals in total. They estimate the category's origin mix, not this chemical specifically.

Source Countries
CN 89%ChinaIN 4%IndiaCA 3%CanadaDE 2%GermanyAR 1%Argentina
1 FDA-registered drug labeler
Strem Chemicals, Inc.

Why It Matters

Sectors
Health
Downstream UsesNot recorded
FDA Shortage Status
No FDA shortage records

Chemical Identity

CAS40391-99-9
PubChem CID4674
DTXSIDDTXSID4023414
FormulaC3H11NO7P2
Mol. Weight235.07 g/mol
SMILESC(CN)C(O)(P(=O)(O)O)P(=O)(O)O

Data Sources

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Brief citations

Pamidronic acid (CAS 40391-99-9) https://chemicalindependence.com/chemical/40391-99-9/ PubChem: 4674. Retrieved 2026-04-07. https://pubchem.ncbi.nlm.nih.gov/compound/4674 FDA National Drug Code directory: CAS 40391-99-9. Retrieved 2026-04-25. https://open.fda.gov/data/ndc/ FDA National Drug Code directory: bulk match. Retrieved 2026-04-07. https://open.fda.gov/data/ndc/ US Census international trade: HS 293149 for CAS 40391-99-9. Reporting year: 2024. https://usatrade.census.gov/