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Calcifediol

Drug ingredient

CAS 19356-17-3

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

Molecular structure of 19356-17-3
US productionNot reported
Import value, 2024$295M
Top sourceChina 56%

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 293629 · basket

These shares come from HS customs code 293629, which covers 17 tracked chemicals in total. They estimate the category's origin mix, not this chemical specifically.

Source Countries
CN 56%ChinaCH 12%SwitzerlandIN 12%IndiaIT 11%ItalyJP 2%Japan
2 FDA-registered drug labelers
Catalent Pharma Solutions, LLC
OPKO Pharmaceuticals LLC

Why It Matters

Sectors
Health
Downstream Uses

Appears in 1 drug and cosmetic product listings (FDA).

  • •Rayaldee
FDA Shortage Status
No FDA shortage records

Chemical Identity

CAS19356-17-3
PubChem CID5283731
DTXSIDDTXSID0022721
FormulaC27H44O2
Mol. Weight400.6 g/mol
SMILESCC(CCCC(C)(C)O)C1CCC2C1(CCCC2=CC=C3CC(CCC3=C)O)C

Data Sources

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Brief citations

Calcifediol (CAS 19356-17-3) https://chemicalindependence.com/chemical/19356-17-3/ PubChem: 5283731. Retrieved 2026-04-07. https://pubchem.ncbi.nlm.nih.gov/compound/5283731 FDA National Drug Code directory: CAS 19356-17-3. 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 293629 for CAS 19356-17-3. Reporting year: 2024. https://usatrade.census.gov/