cysteine
Drug ingredientThis chemical is an active pharmaceutical ingredient used in FDA-regulated drugs.
Where It Comes From
16 FDA-registered drug labelers
Ajinomoto Health & Nutrition North America Inc.
BioActive Nutritional, Inc.
BioActive Nutritionals, Inc.
Deseret Biologicals, Inc
DNA Labs, Inc.
Dr. Donna Restivo DC
Energetix Corporation
Energique, Inc.
Guna spa
H2 Nutrition
Healthy Habits Management Company Inc.
InLight Creation, LLC.
Liddell Laboratories, Inc.
Nutritional Specialties, Inc.
Professional Complementary Health Formulas
Temple Health Nutrition, LLC
Why It Matters
Sectors
Health
Downstream Uses
Appears in 28 drug and cosmetic product listings (FDA).
- •Transform 30
- •Bio Co-Enzyme Phase
- •Mitochondria PRO
- •Diathesis V 1
- •Metox
- •Diathesis IV
- •Metal-Chord
- •TH-101
Show all 28
- •Metab
- •Metabatone
- •Metals
- •Vital Skin Hair Nails
- •Omeosport
- •Diathesis II
- •Oligo Bio Iodine
- •N-24
- •L-Cysteine 7403
- •Thio Combination 9306
- •Hepatic-Tone
- •Ultra Slim 30
- •Diathesis I
- •Diathesis V 2
- •E.O.L.
- •Free Radical
- •Diathesis III
- •MetDetox
- •Metabolism
- •Hepaticol Drops 5008
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
$0.24/gApexbio Technology LLC
CountryUnited States
Pack$61.00 / 250 g
Purity98%
Vendors29 available
Prices reflect listed pack sizes. Small research packs run far above bulk rates.
28 more vendors
| Vendor | Country Supplier country. Where available, shows shipping origin. When the supplier ships from a different country than where they are registered, both are shown. Most suppliers show registration country only. | $/g | Pack | Purity |
|---|---|---|---|---|
| Combi-Blocks, Inc. | United States | $0.51 | 500 g | 95% |
| A2B Chem LLC | United States | $0.56 | 25 g | 97% |
| Chemscene | United States | $0.61 | 500 g | — |
| BLD Pharmatech Co., Limited | United States | $0.61 | 500 g | 95% |
| BLD Pharmatech GmbH | Germany | $0.61 | 500 g | 95% |
| BLD Pharmatech Ltd. | China | $0.61 | 500 g | 95% |
| Ambeed, Inc. | United States | $0.61 | 500 g | 95% |
| Aaron Chemicals LLC | Hong Kong | $0.63 | 500 g | 95% |
| AA BLOCKS | United States | $0.66 | 100 g | 95% |
| Angene Chemical | China → Hong Kong | $0.67 | 500 g | 97% |
| Fluorochem EU | Germany | $1.02 | 25 g | 95% |
| Fluorochem UK | United Kingdom | $1.03 | 25 g | 95% |
| MedChemExpress MCE | Sweden | $1.04 | 500 g | 98% |
| Acrotein ChemBio, Inc. | United States | $1.09 | 250 g | — |
| Manchester Organics | United Kingdom | $1.52 | 100 g | 97% |
| AK Scientific Specialized | United States | $1.64 | 25 g | 95% |
| Angene International Limited | United States | $1.96 | 25 g | 95% |
| AK Scientific, Inc. | United States | $2.76 | 25 g | 98% |
| AstaTech, Inc | United States | $3.16 | 25 g | 95% |
| Sigma-Aldrich (Rush Stock) | Germany | $5.76 | 50 g | — |
| Sigma-Aldrich | Germany | $5.76 | 50 g | — |
| MedKoo Biosciences, Inc | United States | $18.00 | 25 g | 98% |
| Cayman Europe | Estonia | $31.65 | 5 g | 95% |
| Molnova | China | $43.00 | 1 g | 99% |
| Otava, Ltd. | Ukraine | $2280.00 | 50 mg | 95% |
| Otava, Ltd. (2 weeks) | Ukraine | $2724.00 | 50 mg | 90% |
| Angene | China → Hong Kong | $4266.67 | 30 mg | 97% |
| TimTec, LLC (back-ordered) | United States | $32000.00 | 15 mg | 94% |
Chemical Identity
CAS52-90-4
PubChem CID5862
DTXSIDDTXSID8022876
FormulaC3H7NO2S
Mol. Weight121.16 g/mol
SMILESC(C(C(=O)O)N)S
Data Sources
58622026-04-07
https://pubchem.ncbi.nlm.nih.gov/rest/pug/compound/name/cysteine/cids/JSON
Archive: data/sources/pubchem_name/cysteine.json
CAS 52-90-42026-04-24
https://www.epa.gov/tsca-inventory
Archive: data/sources/tsca/tsca_inventory.csv
bulk match2026-04-07
https://open.fda.gov/data/ndc/
Archive: data/sources/fda/ndc/ndc.json