08482 Millipore

X + V Factor Disks

for microbiology

Synonym: Differentiation Disks X + V Factors

  •  NACRES NA.85



Related Categories Diagnostics, Discs, Strips and Cards, Identification Tests & Reagents, Microbiology
Quality Level   100
grade   for microbiology
shelf life   limited shelf life, expiry date on the label
application(s)   microbiology: suitable (microbial identification)
Featured Industry   Clinical Testing
Food and Beverages
storage temp.   2-8°C
suitability   Haemophilus spp. (species)


General description

Member of the genus Haemophilus require hemin (X factor) and/or nicotinamid-adenin-dinucleotid (V-factor). Together with the X factor (Cat. No. 77148) and the V factor (Cat. No. 89788) the need for either one or both factors provides the main means of differentiation of these organisms. Haemophilus species requiring both X and V factors exhibit growth only in the vicinity of the X +V factor discs.


Sterile filter paper discs (50 pcs, diameter 6 mm) impregnated with growth factors (hemin, nicotinamide adenine dinucleotide).

Safety & Documentation

Safety Information

Personal Protective Equipment 
NONH for all modes of transport
WGK Germany 
Flash Point(F) 
Not applicable
Flash Point(C) 
Not applicable


Certificate of Analysis (COA)

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Protocols & Articles


Identification of Microorganisms Based on Color

For microbiologists the most fundamental stain was developed in 1884 by the Danish bacteriologist Hans Christian Gram. The Gram Stain allows the determination of morphology, dividing bacteria into tw...
Jvo Siegrist
Microbiology Focus Edition 1.4, Product Manager Microbiology....
Keywords: Antibiotics, Enzyme activity, Fermentation, Gram stain, Help, Indicators, Reductions

Microbiology Introduction

An initial aim of all microbiologists is the reproducible growth of their microbial cultures, no matter whether the microorganisms are of natural origin or have been genetically engineered by man. Re...
Keywords: Absorption, Aerobic, Anaerobic, Antibiotics, Antimicrobials, Buffers, Culture media, Diffusion, Environmental, Filtration, Genetic, Growth factors, Metabolism, Phase transitions, Precipitation, Reductions, Respiration, Sample preparations, Vitamins

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