Oxidase Reagent according to Gaby-Hadley B

suitable for microbiology

Gaby-Hadley Reagent B
Pricing and availability is not currently available.

Quality Level


according to ISO 9308-1:2014

product line


shelf life

limited shelf life, expiry date on the label


N,N-dimethyl-p-phenylenediamine (oxalate), 0.1 g
dist. water, 100 mL


microbe id | specific enzyme detection: suitable
microbiology: suitable (microbial identification)

Featured Industry

Clinical Testing
Food and Beverages

antibiotic activity spectrum

Gram-negative bacteria


Plesiomonas spp.
Aeromonas spp.
Neisseria spp.
Pseudomonas spp.

General description

Oxidase Reagent can be used to detect oxidase positive organisms. The reagent is colorless in its reduced state and dark purple in its oxidized state. On applying to an oxidase-positive colony, it changes color.


The reagent is used for detection of oxidase activity of a bacterial culture along with Oxidase Reagent A according to Gaby-Hadley.

Personal Protective Equipment

dust mask type N95 (US),Eyeshields,Gloves


NONH for all modes of transport

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Neelima Garg
Laboratory Manual of Food Microbiology (2010)
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