acetyl l-tyrosine

Drug ingredient

CAS 537-55-3

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

US productionNot reported

Import value, 2024$872M

Top sourceSwitzerland 44%

This chemical is listed as active in US commerce, but no company reported it to EPA’s survey for 2019 or 2023. Sites may have made or imported less than the threshold amount, or none.

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 292429 · basket

These shares come from HS customs code 292429, which covers 203 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).

CH 44%SwitzerlandCN 19%ChinaIN 12%IndiaJP 9%JapanIE 6%Ireland

Taiwan
United Kingdom
El Salvador
Colombia
Ukraine
Brazil
Guatemala
Belgium
Netherlands
Turkey
Sweden
Greece
Canada
Israel
New Zealand
Latvia
Lithuania
Finland
Slovakia
Australia
Hong Kong
Czech Republic
Armenia
Poland

3 FDA-registered drug labelers

Ajinomoto Co., Inc.

B. Braun Medical Inc.

ICU Medical Inc.

Why It Matters

Sectors

Health

Downstream Uses

Appears in 2 drug and cosmetic product listings (FDA).

•TrophAmine
•Aminosyn II

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

Vendor Pricing

$0.45/gAK Scientific Specialized

CountryUnited States

Pack$45.00 / 100 g

Purity95%

Vendors13 available

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

12 more vendors

Vendor	Country	$/g	Pack	Purity
Aaron Chemicals LLC	Hong Kong	$0.51	100 g	95%
Angene Chemical	China → Hong Kong	$0.54	100 g	95%
AK Scientific, Inc.	United States	$0.63	100 g	98%
Fluorochem UK	United Kingdom	$1.00	10 g	95%
AstaTech, Inc	United States	$25.08	25 g	95%
A2B Chem LLC	United States	$26.08	25 g	95%
AA BLOCKS	United States	$28.88	25 g	95%
Combi-Blocks, Inc.	United States	$33.60	25 g	95%
Angene International Limited	United States	$41.32	25 g	95%
Labotest KG	Germany	$217.80	5000 mg	90%
Specs	Netherlands	$794.00	5 g	90%
Angene	China → Hong Kong	$4266.67	30 mg	95%

Chemical Identity

CAS537-55-3

PubChem CID68310

DTXSIDDTXSID7046045

FormulaC11H13NO4

Mol. Weight223.22 g/mol

SMILESCC(=O)NC(CC1=CC=C(C=C1)O)C(=O)O

Data Sources

PubChem · compound 68310Retrieved 2026-04-07
EPA TSCA InventoryRetrieved 2026-04-24
FDA National Drug Code directoryRetrieved 2026-04-07
US Census international tradeReporting year: 2024 · Retrieved 2026-10-04

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Brief citations

acetyl l-tyrosine (CAS 537-55-3) https://chemicalindependence.com/chemical/537-55-3/ PubChem: 68310. Retrieved 2026-04-07. https://pubchem.ncbi.nlm.nih.gov/compound/68310 EPA TSCA Inventory: CAS 537-55-3. Retrieved 2026-04-24. https://www.epa.gov/tsca-inventory FDA National Drug Code directory: bulk match. Retrieved 2026-04-07. https://open.fda.gov/data/ndc/ US Census international trade: HS 292429 for CAS 537-55-3. Reporting year: 2024. https://usatrade.census.gov/