Eriochrome Black

Eriochrome Black



From: £35.57

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Why Buy Eriochrome Black Online from UK Chemical Suppliers, ReAgent Chemicals?

We supply Eriochrome Black T in 100g containers, with discounts available for bulk orders. We also offer further options, from bulk quantities to custom packing. With over 30 years’ experience in the field, we’ve built an enviable reputation for high quality products and excellent customer service. Simply contact us for more information or free technical advice.

About Eriochrome Black T

To put it simply, 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 blue/black (protonated form) to red (complexed form). Other similar indicators include, for example, hematoxylin for copper or curcumin for boron.

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

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

Fast 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.


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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