Tasimelteon

Drug ingredient

CAS 609799-22-6

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

US productionNot reported

Import value, 2024$174M

Top sourceItaly 69%

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 293790 · basket

These shares come from HS customs code 293790, which covers 10 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).

IT 69%ItalyCN 22%ChinaDE 3%GermanyIN 2%IndiaJP 2%Japan

Switzerland
Finland
Sweden
Canada
South Africa
Netherlands
Hungary
Spain
Argentina
Israel
Ecuador
South Korea
Poland

11 FDA-registered drug labelers

Amneal Pharmaceuticals NY LLC

Apotex Corp.

Apotex Inc.

Flamma S.p.A.

Formosa Laboratories, Inc.

MSN Life Sciences Private Limited

Patheon Pharmaceuticals Inc.

Solara Active Pharma Sciences Limited

Teva Pharmaceuticals, Inc.

Vanda Pharmaceuticals Inc.

Zhejiang Ausun Pharmaceutical Co., Ltd.

Why It Matters

Sectors

Health

Downstream Uses

Appears in 3 drug and cosmetic product listings (FDA).

•Tasimelteon
•Hetlioz LQ
•Hetlioz

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

CAS609799-22-6

PubChem CID10220503

DTXSIDDTXSID70209826

FormulaC15H19NO2

Mol. Weight245.32 g/mol

SMILESCCC(=O)NCC1CC1C2=C3CCOC3=CC=C2

Data Sources

PubChem · compound 10220503Retrieved 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

Tasimelteon (CAS 609799-22-6) https://chemicalindependence.com/chemical/609799-22-6/ PubChem: 10220503. Retrieved 2026-04-07. https://pubchem.ncbi.nlm.nih.gov/compound/10220503 FDA National Drug Code directory: CAS 609799-22-6. 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 293790 for CAS 609799-22-6. Reporting year: 2024. https://usatrade.census.gov/