Immunohistochemistry kits and reagents

Get sharp and strong staining in your immunohistochemistry (IHC) with optimized reagents

​​Quality reagents are key to the accurate localization and identification of antigens on histological sections. We've learnt this from the thousands of hours that we've spent validating antibodies in IHC.

Find the IHC kits and reagents below that you need to get clean, specific staining even when detecting low abundance markers. Alternatively, consult our IHC application guide or view our IHC protocols.


- Antigen retrieval
​- Blocking
- Primary antibody dilution
- Chromogenic signal amplification
- Fluorescent signal amplification
- Mouse antibodies on mouse tissue
- Counterstaining
- Mounting

Antigen retrieval

Use optimized buffers for heat-induced antigen retrieval and reagents for enzymatic antigen retrieval


Block non-specific antibody binding with blocking serums for IHC or use a convenient protein blocking buffer.

Block endogenous peroxidases, if using HRP for detection, with hydrogen peroxide blocking reagent.

Block endogenous biotin, if using biotin-based amplification, with a biotin blocking agent

Primary antibody diluents

Dilute primary antibodies for IHC using our validated antibody diluent ab64211.

Chromogenic signal amplification

Visualize primary antibody staining using a modern micro-polymer method, and a complete IHC detection micro-polymer kit. Or select from HRP-polymer-conjugated secondary antibodies and chromogenic substrate kits.

Alternatively, use the more traditional streptavidin-biotin (LSAB ABC) method and a complete IHC detection ABC kit. Or select from biotin-conjugated secondary antibodies, streptavidin-enzyme conjugates and chromogenic substrate kits.

If sensitivity is not an issue, then use an HRP conjugated secondary antibody, or a rapid HRP or AP antibody conjugation kit.

Fluorescent signal amplification

Use a dye-conjugated primary antibody, an Alexa-fluor® dye-conjugated secondary antibody or a rapid antibody-dye conjugation kit.

Mouse antibodies on mouse tissue

Stop high background caused by anti-mouse secondary antibodies binding to mouse tissues with a mouse-on-mouse kit.


Identify the location of antibody staining with chromogenic and fluorescent counterstains and special stains for specific cell types, proteins, carbohydrates and metabolites.


Use aqueous mounting media for chromogenic  IHC, or specialist mounting media for fluorescent IHC

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