isoleucine

Drug ingredient

CAS 73-32-5

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

US production29.8K lb

Import volumeZero

Import dependency0%

Top sourceNo public record

Production is reported production, not a complete census of factories. Production reporting year: 2023. Import value and source-country shares describe a shared customs category, not a separate chemical measurement.

Where It Comes From

Customs basis: HS 292249 · basket

EPA reports by year

2023: US production 29.8K lb · Imports Zero

HS customs code 292249 covers 170 tracked chemicals in total. US Census does not break out this chemical's share, so the country-of-origin mix is not available. EPA CDR reports import dependency at the chemical level separately, shown above.

EPA-registered manufacturers (1)

Companies that report making or importing this chemical to the EPA. Registration is US-centric and does not indicate import origin.

Life Technologies

15 FDA-registered drug labelers

Ajinomoto do Brasil Industria e Comercio de Alimentos Ltda.

Ajinomoto Health & Nutrition North America Inc.

B. Braun Medical Inc.

Baxter Healthcare Company

Baxter Healthcare Corporation

BioActive Nutritional, Inc.

Energique, Inc.

Fresenius Kabi USA, LLC

Guna spa

ICU Medical Inc.

KYOWA HAKKO BIO CO., LTD.

Liddell Laboratories, Inc.

Nutritional Specialties, Inc.

Shanghai Ajinomoto Amino Acid Co., Ltd.

Shanghai Plumino Amino Acid Co., Ltd.

Why It Matters

Sectors

Health

Downstream Uses

Appears in 18 drug and cosmetic product listings (FDA).

•Aminosyn-PF
•Strength F
•Plenamine
•Kabiven
•Clinimix
•Clinimix E
•Clinisol
•ProSol

Show all 18

•TrophAmine
•Aminosyn II
•Metabatone
•Vital Skin Hair Nails
•Osteobios
•Travasol
•Perikabiven
•ANTI AGE SKIN
•Metab
•Premasol - sulfite-free (Amino Acid)

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

Industrial Uses

•Catalyst in Pharmaceutical and Medicine ManufacturingUse—non-incorporative activities

Vendor Pricing

$0.33/gBLD Pharmatech Ltd.

CountryChina

Pack$331.00 / 1 kg

Purity95%

Vendors16 available

Prices reflect listed pack sizes. Small research packs run far above bulk rates.

15 more vendors

Vendor	Country	$/g	Pack	Purity
Aaron Chemicals LLC	Hong Kong	$0.33	500 g	95%
Angene Chemical	China → Hong Kong	$0.38	500 g	98%
Combi-Blocks, Inc.	United States	$0.52	500 g	97%
MedChemExpress MCE	Sweden	$0.66	500 g	98%
A2B Chem LLC	United States	$0.68	100 g	95%
AA BLOCKS	United States	$0.75	100 g	95%
AstaTech, Inc	United States	$0.96	25 g	95%
Cayman Europe	Estonia	$1.12	50 g	98%
Angene International Limited	United States	$1.18	100 g	98%
TargetMol Chemicals	China → United States	$29.00	1 g	98.32%
Interbioscreen	Hong Kong	$34.00	10 g	95%
Labotest KG	Germany	$453.00	1000 mg	90%
Vitas M Chemical Limited	Hong Kong	$4020.00	50 mg	90%
Princeton BioMolecular Research (SC)	United States	$4200.00	50 mg	90%
Angene	China → Hong Kong	$4266.67	30 mg	98%

Chemical Identity

CAS73-32-5

PubChem CID6306

DTXSIDDTXSID1047441

FormulaC6H13NO2

Mol. Weight131.17 g/mol

SMILESCCC(C)C(C(=O)O)N

Data Sources

PubChem · compound 6306Retrieved 2026-04-07
EPA Chemical Data ReportingReporting year: 2023 · Retrieved 2026-10-04
FDA National Drug Code directoryRetrieved 2026-04-07

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Brief citations

isoleucine (CAS 73-32-5) https://chemicalindependence.com/chemical/73-32-5/ PubChem: 6306. Retrieved 2026-04-07. https://pubchem.ncbi.nlm.nih.gov/compound/6306 EPA Chemical Data Reporting: 73-32-5. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting FDA National Drug Code directory: bulk match. Retrieved 2026-04-07. https://open.fda.gov/data/ndc/