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Hemostasis Research

Take advantage of Rossix know how in your research and product development.

Phospholipid Emulsions

Our highly stable phospholipid emulsions are suitable for use in analyses related to procoagulant and anticoagulant pathways.

Chromogenic Kits

Learn more about our Chromogenic Kits.



Rossix is a company devoted to Thrombosis and Hemostasis. The company represents the experience of more than 30 years of development work in the field. 


Rossix provides Products for use in Hemostasis Research and Quality Control and we perform Contract Analyses on a regular basis. The vast majority of our customers are pharmaceutical companies and academic bioscience laboratories.


Rox Factor XIa

REF 110050

A chromogenic kit for quantitative activity determination of Factor XIa in enriched or highly purified protein preparations.

Use together with Factor XIa Calibrator and Control assigned in U/ml against the first NIBSC reference reagent, 11/236.

Rox Factor IX - CE

REF 900020

Our chromogenic kit for quantitative activity determination of Factor IX is now CE marked and 

approved for In Vitro Diagnostic Use in Europe.

Outside Europe the Rox Factor IX kit is still available for research use.

Where to Buy?

In a number of countries, Rossix has local distributors which are specialized in the field of Thrombosis and Hemostasis.

For other countries Rossix sells directly to end users:


2016-06-22 Publication in collaboration with NovoNordisk

Rosén P, Rosén S, Ezban M, Persson E.

Overestimation of N-glycoPEGylated factor IX activity in one-stage factor IX clotting assay owing to silica-mediated premature conversion to activated factor IX.

J Thromb Haemost 2016; 14: 1420-7.


2016-05-23 Steffen Rosén, Rossix will hold a presentation at the SSC meeting in Montpellier.

Title : New Tools to Study Contact Activation
Session : Factor XI and the Contact System
Room : Barthez
Date : 27-05-2016


2016-05-23 Pia Bryngelhed, Rossix will present a poster at the SSC meeting in Montpellier.

Poster FVIII-49:

Application of Rox Factor IX on the ACL TOP 700


2015-04-13 Publication in collaboration with AstraZeneca

Ann Lövgren et al. Blood Coagulation and Fibrinolysis, Characterization of thrombin derived from 

human recombinant prothrombin.

Open access: click here


2014-11-13 ECAT meeting 2014 - Leiden, NL

Steffen Rosén, Rossix held a presentation titled

How to measure low levels of Factor VIII and IX


2014-06-18  Rox Factor IX - CE

The Rox Factor IX kit for determination of Factor IX activity is approved for In Vitro Diagnostic Use in Europe.

Learn more >>