Eriochrome Black

Eriochrome Black



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Buy Eriochrome Black T Online from Leading UK Chemical Suppliers

Eriochrome Black T indicator is available in 100g containers in our online shop, where you can also get discounts on bulk orders. ReAgent also offers a range of options to suit the needs of your business, from bulk quantities to custom packing and custom labelling.

With over 40 years of industry experience, we have built an enviable reputation for high-quality products and leading customer service. All of our products are backed by a 100% quality guarantee, and we are accredited to a range of ISO standards so that you can buy with confidence. Simply contact us for more information or for free technical advice.


About Eriochrome Black T Indicator

Eriochrome Black T is an indicator used in many titration reactions. More specifically, it’s a complexometric indicator which means it undergoes a colour change in the presence of specific metal ions. In this case, Eriochrome Black T is able to detect calcium, aluminium and magnesium by turning from a blue/black protonated form to a red complexed form.


Chemical Properties of Eriochrome Black

  • Common name: Eriochrome Black T
  • Other names: Mordant Black, Solochrome Black, Chromazine Black
  • Systematic name: Sodium 1-[(1-Hydroxynaphthalen-2-yl-hydrazinylidene]-6-nitro-2-naphthol-4-sulfonate
  • Molecular formula: C20H12N3O7SNa
  • Molar mass: 461.3 g/mol
  • Appearance: Black powder
  • Stability: Incompatible with strong oxidising and reducing agents
  • Uses: indicator in titrations


Environmental and Health Concerns

It is important to emphasise that this compound is classed as toxic to aquatic organisms, with the potential to cause long-term damage. As such, it is essential to follow local regulations during the disposal of waste.

In addition, Eriochrome Black T is also considered an irritant to the eyes and throat and is also slightly irritating on skin contact. Affected areas should be washed with copious amounts of water and protective clothing must be worn at all times.


24 Hour Delivery

We pride ourselves of a fast delivery service and aim to have your order on the way to you within 24 hours after purchase. All our products come with 100% quality guarantee, supported by free technical advice by a friendly member of our customer service team. Contact us today for more information on how we can help your business.


BulkCode Pictogram pictogramimage id Active
1589 GHS07 1 1


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 businesses at non-residential addresses with a minimum order value of €100.

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.