Serine protease inhibitor. Specific irreversible inhibitor of serine proteases including trypsin, chymotrypsin, plasmin, plasma kallikrein, and thrombin. Stable, non-toxic alternative to PMSF (ALX-270-184). Inhibitor of NAD(P)H oxidase. Activator of MAP kinases JNK and p38. Alternative name: 4-(2-Aminoethyl)benzenesulfonylfluoride . HCl, PefablocSC. Formula: C8H10FNO2S . HCl. MW: 239.7. Purity: ≥98% (HPLC). Appearance: White to off-white powder. Solubility: Soluble in water or 100% ethanol. Long Term Storage: +4°C. Handling: Protect from moisture and light.