Thermo Scientific™ Pierce™ Coomassie Plus™ (Bradford) Protein Assay

Brown-to-purple (A595nm), ready-to-use, fast reducing agent-compatible assay reagent to measure total protein concentration vs. protein standard.

Brand: Thermo Scientific™

Manufacturer Part Number: 23238

UNSPSC: 41116012

Code: PN

Additional Details:
Additional Details: CAS Number: 7664-38-2 Weight: 1.47420kg Transport: UN number : 3264 Chem class : 1a Pack group : II

Product Code. 10495315

Quantity Price
1 £ 134.0 / 300mL
EU Stock 20
Add to basket

  • Description and Specification
  • Documentation
  • Accessories and Spare Parts
Description and Specification


Description Pierce Coomassie Plus (Bradford) Protein Assay Reagent
Formulation Proprietary acidic solution containing coomassie G-250 dye
Quantity 300mL
Sufficient For 200 tube assays or 1000 microplate assays (standard sold separately)

The Pierce Coomassie Plus Assay Reagent is a single, ready-to-use solution for measuring protein concentration. Simply add the reagent to equal volumes of samples and standards, mix, then measure the absorbance at 595nm. The assay costs only pennies per sample and can be performed in either test tube or microplate format. The Pierce Coomassie Plus Assay Reagent provides increased linearity of response and only half the protein-to-protein variability of other commercial Bradford assay formulations.


  • Colorimetric – measure with a standard spectrophotometer or plate reader (595nm)

  • Easy to use – single reagent; no working reagent preparation required

  • Fast – almost immediate color development; add, mix, and read results

  • Broad range – detects protein concentration in the range 1 to 1500μg/mL

  • Better – improved linearity and response-uniformity compared to traditional Bradford formulations

  • Flexible – microplate and cuvet protocols provided with the instructions and adaptable to several target working ranges



Technical documents

Accessories and Spare Parts