cystine
Drug ingredientThis chemical is an active pharmaceutical ingredient used in FDA-regulated drugs.
Where It Comes From
3 FDA-registered drug labelers
DNA Labs, Inc.
InLight Creation, LLC.
PharmaZell GmbH
Why It Matters
Sectors
Health
Downstream Uses
Appears in 2 drug and cosmetic product listings (FDA).
- •N-17
- •E.O.L.
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
$0.39/gA2B Chem LLC
CountryUnited States
Pack$195.00 / 500 g
Purity98%
Vendors27 available
Prices reflect listed pack sizes. Small research packs run far above bulk rates.
26 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 | $0.39 | 500 g | 97% |
| AA BLOCKS | United States | $0.45 | 500 g | 98% |
| Aaron Chemicals LLC | Hong Kong | $0.48 | 100 g | 98% |
| Chemscene | United States | $0.51 | 500 g | — |
| Angene Chemical | China → Hong Kong | $0.53 | 100 g | 98% |
| MedChemExpress MCE | Sweden | $0.64 | 500 g | 98% |
| Fluorochem EU | Germany | $0.76 | 100 g | 95% |
| BLD Pharmatech Co., Limited | United States | $1.43 | 100 g | 98% |
| BLD Pharmatech GmbH | Germany | $1.43 | 100 g | 98% |
| BLD Pharmatech Ltd. | China | $1.43 | 100 g | 98% |
| Ambeed, Inc. | United States | $1.43 | 100 g | 98% |
| Acrotein ChemBio, Inc. | United States | $1.67 | 250 g | — |
| AK Scientific, Inc. | United States | $2.80 | 25 g | 98% |
| AstaTech (2 weeks) | United States | $3.99 | 100 g | 97% |
| Fulfilled by Molport | Latvia | $5.00 | 1 g | — |
| Angene International Limited | United States | $5.72 | 25 g | 98% |
| Molnova | China | $43.00 | 1 g | 99% |
| TargetMol Chemicals | China → United States | $145.00 | 200 mg | — |
| ChemNorm | China | $150.00 | 100 mg | 98% |
| Labotest KG | Germany | $453.00 | 1000 mg | 90% |
| 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 | 98% |
| Princeton BioMolecular Research (SC) | United States | $8000.00 | 15 mg | 90% |
| Vitas M Chemical Limited | Hong Kong | $9000.00 | 10 mg | 90% |
| TimTec, LLC (back-ordered) | United States | $32000.00 | 15 mg | 94% |
Chemical Identity
CAS56-89-3
PubChem CID67678
DTXSIDDTXSID2046418
FormulaC6H12N2O4S2
Mol. Weight240.3 g/mol
SMILESC(C(C(=O)O)N)SSCC(C(=O)O)N
Data Sources
676782026-04-07
https://pubchem.ncbi.nlm.nih.gov/rest/pug/compound/name/cystine/cids/JSON
Archive: data/sources/pubchem_name/cystine.json
CAS 56-89-32026-04-24
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