6-Aminopenicillanic acid

Drug ingredient

CAS 551-16-6

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

US productionNot reported

Import value, 2024$6.4B

Top sourceSingapore 36%

EPA lists this chemical as inactive, meaning no company reported making, importing or processing it in the US from 2006 to 2016.

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 293499 · basket

These shares come from HS customs code 293499, which covers 575 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).

SG 36%SingaporeIE 23%IrelandCN 11%ChinaCH 6%SwitzerlandIN 5%India

Finland
Netherlands
Canada
Indonesia
Mexico
Taiwan
South Korea
Austria
Croatia
Sweden
Ukraine
Denmark
Israel
Czech Republic
New Zealand
Hong Kong
Kyrgyzstan
Australia
Portugal
South Africa
Poland
Slovenia
Brazil
Slovakia
Vietnam
Latvia
Malta
Hungary
Romania
Kenya
Belarus
Russia
Turkey
Norway

4 FDA-registered drug labelers

Aurobindo Pharma Limited

Inner Mongolia Changsheng Pharmaceutical Co., Ltd.

Sinopharm Weiqida Pharmaceutical Co., Ltd.

The United Laboratories (Inner Mongolia) Co., Ltd.

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

Vendor Pricing

$14.50/gTargetMol Chemicals

CountryChina (registered: United States)

Pack$29.00 / 2 g

PurityNot recorded

Vendors10 available

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

9 more vendors

Vendor	Country	$/g	Pack	Purity
Labotest KG	Germany	$217.80	5000 mg	90%
Specs	Netherlands	$376.31	1 g	90%
Vitas M Chemical Limited	Hong Kong	$638.00	1 g	90%
AA BLOCKS (2 weeks)	United States	$639.00	1 g	—
A2B Chem LLC (2 weeks)	United States	$645.00	1 g	—
Otava, Ltd. (2 weeks)	Ukraine	$2724.00	50 mg	90%
Princeton BioMolecular Research (SC)	United States	$2900.00	100 mg	90%
ChemDiv, Inc.	United States	$4070.00	100 mg	90%
Asinex	Netherlands	$6461.40	100 mg	90%

Chemical Identity

CAS551-16-6

PubChem CID11082

DTXSIDDTXSID7046097

FormulaC8H12N2O3S

Mol. Weight216.26 g/mol

SMILESCC1(C(N2C(S1)C(C2=O)N)C(=O)O)C

Data Sources

PubChem · compound 11082Retrieved 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

6-Aminopenicillanic acid (CAS 551-16-6) https://chemicalindependence.com/chemical/551-16-6/ PubChem: 11082. Retrieved 2026-04-07. https://pubchem.ncbi.nlm.nih.gov/compound/11082 EPA TSCA Inventory: CAS 551-16-6. 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 293499 for CAS 551-16-6. Reporting year: 2024. https://usatrade.census.gov/