Bromophenol Blue

Bromophenol Blue



From: £116.77

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Why Buy Bromophenol Blue Online from UK Chemical Suppliers, ReAgent Chemicals?

ReAgent supply bromophenol blue (powdered form) in 5 kg and 25 kg containers. Discounts are available for purchases over 4 items. We can also supply ready-made 0.04% bromophenol solution in 500 ml and 2.5 L containers.

Used as an acid-base indicator

Bromophenol blue – long name 3′,3″,5′,5″-tetrabromophenolsulfonphthalein – can be used as a pH indicator, a dye and a colour marker. It’s usually prepared by gently mixing bromine to phenolsulfonphthalein in glacial acetic acid.

  • pH indicator: It changes colour from yellow at pH 3 to purple at pH 4.6, in a reversible reaction. In chemical terms, the reaction is akin to what happens to phenolphthalein, another popular pH indicator.
  • Colour marker: Popularly used to monitor progress during electrophoresis (both agarose gel and polyacrylamide gel). As this compound has a slight negative charge, it will travel in the gel closely to the DNA or protein being tested. For example, using a 1% agarose gel in TAE or TBE buffer, bromophenol blue travels at the same speed as a 500 base pair DNA fragment.
  • Dye: At pH 7 and above, this compound absorbs red light and transmits blue light, which means solutions are blue. In acidic solutions (pH<7), this dye absorbs ultraviolet light and transmits in the yellow range. Interestingly, at pH 3.6 (when colour changes), this compound has a green or red colour, depending on the concentration. This is called dichromatic colour.

100% quality guarantee

We supply all our products with a 100% guarantee to gain our client’s trust. All our procedures are regularly audited to ensure we comply with stringent standards of quality. We have a long list of chemicals available, including bespoke products, to cover all your needs. If you need any further information, simply contact us for a quote or a technical question. We’re here to help.


MSDS Files

The following files are available to download:

Product ID Product post_status Bulk Download SDS File

Please note: we only deliver to registered UK businesses at non-residential addresses with a minimum order value of £100 before VAT

We only supply to mainland UK, contact us on 0800 990 3258 for rates to Ireland.

Please notify us if you have specific delivery requirements such as restricted access, requirement for a tail-lift delivery vehicle or pallet truck. Failure to notify us of a special delivery instructions can incur additional charges from our carriers.

Looking for further options on this product?

  • Custom packaging
  • Personalised labelling
  • Specific pack sizes
  • Different grades available
  • Bespoke blending
  • Bulk quantities

Call 0800 990 3258 for details or Contact Us

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