S-2765 is a chromogenic substrate for determination of Factor Xa. It is also very sensitive to trypsin.

Each vial contains the chromogenic substrate S-2765, 25 mg and mannitol 60 mg as a bulking agent.

Stability: Lyophilized substance: stable at 25°C until expiry date printed on the label. The substance is hygroscopic and should be stored in a dry place.

Solution: 2 mmol/L in H2O is stable for six months at 2 to 8°C. Suitable stock solution: 1-2 mmol/L in H2O.

Chemical name: N-a-Benzyloxycarbonyl-Darginyl-L-glycyl-L-arginine-pnitroaniline-dihydrochloride

Formula: N-a-Z-D-Arg-Gly-Arg-pNA·2HCl

Mol. wt.: 714.6