CAS Registry Number

CAS 53597-25-4 — Protamine sulfate from salmon

Protamine sulfate from salmon is a naturally occurring polypeptide used primarily as an antidote to reverse heparin-induced anticoagulation, as well as in the stabilization of insulin formulations. It is also employed in molecular biology for DNA precipitation. This product has a CAS number of 53597-25-4, a molecular formula of C₁₆H₃₆N₄₅O₁₀S₃ (note: the original formula appears incorrect—protamine sulfate’s formula is typically a variable-length polypeptide with sulfur content), and a molecular weight of approximately 4,000–5,000 Da (varies by source). Store at -18°C for long-term stability. No signal word applies under standard handling. Molekula supplies Protamine sulfate from salmon from research to bulk quantities with full documentation and ISO 9001:2015 traceability.