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We can only ship non-hazardous products to Rest of World

Methyl Red Sodium Salt C.I. 13020

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Price: £14.04

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Stock Availability

On Shelf - Approx. UK delivery date: Wednesday the 22nd October 2025*

In bulk stock - ships within 10 - 12 Working Days (Excluding weekends and public holidays)

4 to 6 weeks approx. (Not guaranteed)

UK Shipping

Unfortunately, we are not currently accepting orders for Northern Ireland, Jersey and Guernsey.

We can only ship to the following postcodes where a Royal Mail postal option has been chosen at checkout.

AB, DD, DG3, DG4, DG6 - DG9, EH, FK, G, HS, IM, IV, KA, KW, KY, ML, PA, PH, PO30 - PO41, TD, TR21 - TR25, ZE

* We will always try to ship as early as possible. Delivery could be much quicker than stated but is not guaranteed

Applications

pH Indicator
Identification of bacteria in Microbiology

General

Methyl Red sodium salt is the sodium salt of Methyl Red. Methyl red is an indicator dye that turns red in acidic solutions. It is a pH indicator, turning red under pH 4.4, yellow over pH 6.2, and orange in between those values. It is used in microbiology in the Voges-Proskauer test to identify bacteria that produce stable acids through mixed acid fermentation of glucose. Methyl-red positive bacteria include Proteus vulgaris and Escherichia coli. Methyl-red negative bacteria include Enterobacter aerogenes and Serratia marcescens.