Erythromycin stearate

Drug ingredient

CAS 643-22-1

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

US productionNot reported

Import value, 2024$16M

Top sourceChina 83%

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 294150 · basket

These shares come from HS customs code 294150, which covers 8 tracked chemicals in total. They estimate the category's origin mix, not this chemical specifically.

Source Countries

Country of origin for US imports, from Census customs data (2024).

CN 83%ChinaIN 13%IndiaES 3%SpainCH 1%Switzerland

Italy
Hong Kong
Canada
Belgium

2 FDA-registered drug labelers

Calyx Chemcials & Pharmaceuticals

SM Biomed Sdn.Bhd.

Why It Matters

Sectors

Health

Downstream UsesNot recorded

FDA Shortage Status

Whether any manufacturer currently reports this drug as in shortage on the FDA Drug Shortages database. "Active Shortage" means at least one presentation has status "current."

No FDA shortage records

Chemical Identity

CAS643-22-1

PubChem CID12559

DTXSIDDTXSID0020571

FormulaC55H103NO15

Mol. Weight1018.4 g/mol

SMILESCCCCCCCCCCCCCCCCCC(=O)O.CCC1C(C(C(C(=O)C(CC(C(C(C(C(C(=O)O1)C)OC2CC(C(C(O2)C)O)(C)OC)C)OC3C(C(CC(O3)C)N(C)C)O)(C)O)C)C)O)(C)O

Data Sources

PubChem · compound 12559Retrieved 2026-04-07
FDA National Drug Code directoryRetrieved 2026-04-25
FDA National Drug Code directoryRetrieved 2026-04-07
US Census international tradeReporting year: 2024 · Retrieved 2026-10-04

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Brief citations

Erythromycin stearate (CAS 643-22-1) https://chemicalindependence.com/chemical/643-22-1/ PubChem: 12559. Retrieved 2026-04-07. https://pubchem.ncbi.nlm.nih.gov/compound/12559 FDA National Drug Code directory: CAS 643-22-1. 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 294150 for CAS 643-22-1. Reporting year: 2024. https://usatrade.census.gov/