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DL-Methionine

Drug ingredient

CAS 59-51-8

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

Molecular structure of 59-51-8
US productionNot reported
Import value, 2024$14M
Top sourceChina 72%

EPA lists this chemical for 2023 but publishes zero or no volume for both production and imports.

Why supply is unknown

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 293040 · narrow

EPA reports by year
2023
US production Not published · Imports Not published
2019
US production Not published · Imports Not published

These shares come from HS customs code 293040, which covers 3 tracked chemicals in total. They estimate the category's origin mix, not this chemical specifically.

Source Countries
CN 72%ChinaJP 18%JapanMY 9%Malaysia
Domestic parents -- activity not disclosed (1)
Wego Chemical Group

Why It Matters

Sectors
Health
Downstream Uses

Appears in 1 drug and cosmetic product listings (FDA).

  • •E.O.L.
FDA Shortage Status
No FDA shortage records

Vendor Pricing

$0.01/gAaron Chemicals LLC
CountryHong Kong
Pack$7.00 / 500 g
Purity95%
Vendors31 available

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

30 more vendors
VendorCountry$/gPackPurity
Angene ChemicalChina → Hong Kong$0.02500 g99%
A2B Chem LLCUnited States$0.031 kg95%
AA BLOCKSUnited States$0.031 kg98%
BLD Pharmatech Co., LimitedUnited States$0.031 kg98%
Ambeed, Inc.United States$0.031 kg98%
BLD Pharmatech GmbHGermany$0.041 kg98%
BLD Pharmatech Ltd.China$0.041 kg98%
ChemsceneUnited States$0.051 kg—
Acrotein ChemBio, Inc.United States$0.06500 g—
SynthonixUnited States$0.06500 g95%
Sigma-Aldrich (Rush Stock)Germany$0.0610 kg99%
Sigma-AldrichGermany$0.0610 kg99%
Fluorochem EUGermany$0.11100 g95%
AK Scientific SpecializedUnited States$0.14500 g95%
AK Scientific, Inc.United States$0.18500 g99%
Combi-Blocks, Inc.United States$0.251 kg98%
Angene International LimitedUnited States$0.35500 g99%
MedKoo Biosciences, IncUnited States$0.561 kg98%
MedChemExpress MCESweden$0.87100 g98%
AstaTech (2 weeks)United States$6.005 g98%
InterbioscreenHong Kong$24.0010 g95%
MolnovaChina$74.00500 mg99%
Labotest KGGermany$217.805000 mg90%
Vitas M Chemical LimitedHong Kong$390.00500 mg90%
Otava, Ltd.Ukraine$460.00250 mg95%
Princeton BioMolecular Research (SC)United States$2900.00100 mg90%
AngeneChina → Hong Kong$4266.6730 mg99%
AsinexNetherlands$6461.40100 mg90%
Key Organics Ltd.United Kingdom$6900.0010 mg98%
TimTec, LLC (back-ordered)United States$32000.0015 mg94%

Chemical Identity

CAS59-51-8
PubChem CID876
DTXSIDDTXSID9020821
FormulaC5H11NO2S
Mol. Weight149.21 g/mol
SMILESCSCCC(C(=O)O)N

Data Sources

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Brief citations

DL-Methionine (CAS 59-51-8) https://chemicalindependence.com/chemical/59-51-8/ EPA CompTox (DSSTox): DTXSID9020821. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID9020821 PubChem: 876. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/876 EPA Chemical Data Reporting: 59-51-8. 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/ US Census international trade: HS 293040 for CAS 59-51-8. Reporting year: 2024. https://usatrade.census.gov/