Gel Loading Dye, Purple (6X), no SDS


Catalog # Size Concentration Price (£)
B7025S 4 ML 6 X £43.00

Gel Loading Dye, Purple (6X) is the premier gel loading dye from NEB for sharp, tight bands.

  • No UV shadow

  • Contains Ficoll® for brighter, tighter bands

  • Contains EDTA to stop enzymatic reactions

  • Compatible with agarose and non-denaturing polyacrylamide gels

  • Our Purple Gel Loading Dye sharpens bands and eliminates the UV shadow seen with other dyes. Available with  (NEB #B7024S) or without SDS

Gel Loading Dye, Purple (6X), no SDS is a pre-mixed loading buffer which contains a combination of two dyes, Dye 1 (pink/red) and Dye 2 (blue). The red dye serves as the tracking dye for both agarose and non-denaturing polyacrylamide gel electrophoresis. The two dyes separate upon gel electrophoresis; the red band is the major indicator and migrates similarly to Bromophenol Blue on agarose gels. Specifically chosen, this dye does not leave a shadow under UV light. EDTA is also included to chelate magnesium (up to 10 mM) in enzymatic reactions, thereby stopping the reaction. The dye also contains Ficoll®, which creates brighter and tighter bands when compared to glycerol loading dyes. This product is packaged as 4x1 ml vials.
Comparison of dye fronts
Comparison of dye fronts Nucleic acid samples were run on an agarose gel, with either Purple or Blue loading dyes. Both dyes ran at the same speed.UV shadow comparison
UV shadow comparison The new Gel Loading Dye, Purple (6X), no SDS, (Lane 1) included in the Quick-Load Purple 1kb DNA Ladder does not cast a UV shadow over the underlying bands, unlike the Gel Loading Dye, Blue (6X) (Lane 2).

Reagents Supplied

The following reagents are supplied with this product:


Component Name

Component #

Stored at (°C)



  • B7025S






Advantages and Features

Properties & Usage

Related Products

Product Notes


Quality Control Assays

Certificate of Analysis

Specifications & Change Notifications

The Specification sheet is a document that includes the storage temperature, shelf life and the specifications designated for the product. The following file naming structure is used to name these document files: [Product Number]_[Size]_[Version]

The following link is to a PDF Safety Data Sheet (SDS) that applies to this product to help you use it safely.


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