MRX Fib Clauss

Lyophilised reagents for quantifying fibrinogen in human citrated plasma, according to the Clauss method.

Fibrinogen Clauss (Fib Clauss) is the internationally most established method to determine fibrinogen in human plasma, which is of clinical importance when unexplained bleeding occurs.

Linearity up to 8 g/L

Excellent stability

Sensitivity & Specificity

Details & typical data

Product form: Lyophilised
Fib Clauss products: • MRX942B (100 UNIH/mL thrombin)
Available volumes: • 5 mL
Origin: Bovine thrombin
Additional products needed: • Diluent (GHI154) or CLSI CLRW type water or equivalent
• Sample Diluent (0,9% NaCl) for sample and calibrator dilutions (MRX184)
• Eximius Control Basic or Plus (L1/L2/L3) (MRX170-MRX173, MRX180-MRX183)
• Scandinavian Controls Basic, Multi and Multi Plus (L1/L2) (GHI163/GHI169; GHI164/GHI170; GHI164 GHI170)
• Fib Clauss Calibrator (MRX1204) or Multi Calibrator II (MRX1203)
• Imidazol Buffer (MRX185-15) required for some instruments

Details: MRX942B
Linearty: Linear calibration from 0,6-8,0 g/L
Expected values: 1,49-3,57 g/L
Interfering substances: No interferences with Bilirubin <50 mg/L, Heparin <4,0 IU/mL, Triglycerides <3,75 g/L, Dabigatran <475 μg/L, Haemolyzed plasma should not be assayed

Stability & storage

Storage: 2-8 °C
Shelf-life: 24 months at 2-8 °C
Reconstituted solution: 7 days at 2-25 °C

Ordering information

Ref. No Product description Size
MRX942B MRX Fib Clauss, 100 UNIH/mL 10x5 mL
MRX170 Eximius Control Basic, L1+L2+L3 4+4+2x1 mL
MRX171/172/173 Eximius Control Basic, L1/L2/L3 10x1 mL pack per level
MRX180 Eximius Control Plus, L1+L2+L3 4+4+2x1 mL
MRX181/182/183 Eximius Control Plus, L1/L2/L3 10x1 mL pack per level
GHI163/169 Scandinavian Control Basic, L1/L2 10x1 mL pack per level
GHI162/167B Scandinavian Control Multi, L1/L2 10x1 mL pack per level
GHI164/170 Scandinavian Control Multi Plus, L1/L2 10x1 mL pack per level
MRX1204 Fib Clauss Calibrator 1x1 mL
MRX1203 Multi Calibrator II (PT Quick, AT, fibrinogen) 1x1 mL
GHI154 Diluent (CLSI CLRW type water) 10x5 mL
MRX184 Sample Diluent (0,9 % NaCl) 10x8 mL
MRX185-15 Imidazol Buffer 10x15 mL
Order products Close

To order a desired product, send an email to 


If you have any further thoughts or questions, don’t hesitate to call us at +46 (0)155 45 44 10.