Amifostine is a small-molecule organophosphorothioate compound used as a pharmaceutical chemical intermediate, also commonly referred to as WR-2721 or its dephosphorylated form WR-1065, all corresponding to the same substance identity under CAS 20537-88-6. It functions through enzymatic dephosphorylation to generate active thiol species, which are involved in cellular protection mechanisms against radiation-induced damage, making it typically applied in radioprotective pharmaceutical synthesis and related medicinal production processes. For industrial users, the material is available with competitive factory pricing, customized specifications, and full documentation including MSDS, TDS, COA, supporting bulk supply requirements.
Amifostine CAS 20537-88-6
- CAS: 20537-88-6
- Synonyms: Amifostine, WR-2721, Ethyol, S-2-(3-aminopropylamino)ethyl phosphorothioate
- Molecular Formula: C5H15N2O3PS
- Grade: Industrial grade 98%
- Package: 200kg iron drum or 50kg plastic drum packaging
Product Description
amifostine
alias: 2-(3-aminopropylamino)ethylsulfanylphosphonic acid; Ethiofos; Sapep; Gammaphos; Apaetp;
CAS Number: 20537-88-6Molecular formula: C5H15N2O3PS
Molecular weight: 214.22300
Appearance and properties: white crystalline powder or lyophilized lumps; There is a special smellDensity: 1.367 g/cm3
Melting point: 160-161ºC
Boiling point: 441.7ºC at 760 mmHg
Flash point: 220.9ºC
Storage conditions: The warehouse is ventilated and dried at low temperature
Category: Chemical drugs and biological products >> Drugs for the treatment of tumors >> Anti-tumor adjuvant drugs
Specification: 200g/piece, or 1kg/bag
Uses: Amphostine is a normal cell protector and is mainly used in the adjuvant treatment of various cancers in clinical practice.
FAQ - Technical & Supply Chain
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Q:
Does CAS 20537-88-6 refer to the phosphorylated thiophosphonate prodrug used as a cytoprotective agent?
A: Yes. CAS 20537-88-6 identifies Amifostine (ethiofos), an organic thiophosphate compound. It is technically characterized as a prodrug that requires dephosphorylation by alkaline phosphatase into its active thiol metabolite, WR-1065, to provide specialized protective effects against certain therapeutic side effects in industrial and pharmaceutical synthesis contexts. -
Q:
Is Amifostine intended for industrial pharmaceutical production rather than laboratory research only?
A: Amifostine is typically supplied as a chemical intermediate intended for pharmaceutical manufacturing and process use, rather than being limited to small-scale laboratory research applications.
Documents and Product Support
For product review and sourcing evaluation, supporting documents can be coordinated according to the product type, inquiry stage, and order requirements.
- COA for batch-based quality reference
- TDS for key physical and chemical information
- SDS / MSDS for handling, storage, and safety reference
- Packing information for sample, trial, and bulk orders
- Technical communication based on application and specification requirements
Information to Confirm Before Quotation
Clear sourcing information helps reduce specification mismatch and allows a more accurate quotation before sample or bulk order discussion.
- Product name and CAS number
- Application or intended end use
- Required purity, grade, or specification
- Sample quantity, trial order, or bulk demand
- Preferred packing form or net weight
- Destination country or port
- Required documents or compliance expectations
Packaging, Storage, and Handling Notes
Packaging form, storage conditions, shelf life, and shipment arrangements should be confirmed according to the product characteristics, package size, and destination requirements.
Before order confirmation, buyers are advised to review the corresponding product documents and confirm whether any special storage, labeling, or handling requirements apply.
Sample, Bulk Order and Repeat Supply Support
Support can be arranged for sample discussion, bulk supply planning, packaging confirmation, and routine sourcing communication based on the actual product and order requirements.
For repeat-use formulations or long-term procurement plans, buyers may discuss specification consistency, packaging preferences, delivery expectations, and document coordination in advance.





