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Neutral red (C.I. 50040), 25 g

Pack Qty.
Toluylene red
Empirical formula C15H17ClN4
Molar mass (M) 288,78 g/mol
Melting point (mp) 290 °C
CAS No. 553-24-2
EG-Nr. 209-035-8

Indicator pH 6,8-8,0
Dissolve 0.3 g in 100 ml of ethanol (70 %)

Water-soluble vital staining dye.
Product details

€181.70/Pack Qty. 

excl. VAT. | 25 g per Pack Qty.

Art. No. T122.3

In production
from 6 Pack Qty. €172.62/Pack Qty.
from 24 Pack Qty. €163.53/Pack Qty.
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Product details

Neutral red (C.I. 50040) p.a.

Water-soluble vital staining dye.

Technical Information
Dyeing living cells red 
Colour conversion red - orange yellow 
Ox. colour red-violet 
Transition range pH 6,8 - 8,0 
Red. colour colourless 
Redox potential E0[V] at pH=0 and 20 °C +0.25 
Use vitality test 
Neutral red (C.I. 50040)
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  1. Subtotal:  0.00
Art. No. Pack Qty. Pack. Price Quantity
T122.1 10 g glass


T122.2 1 g glass


T122.3 25 g glass


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In procurement
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Selected quantity:   0
  1. Subtotal:  0.00

Downloads / MSDS

General information

Indicators and Dyes

Carl ROTH offers many indicators and dyes of high purity, which can be used in special applications.

Certificates of Analysis

You can search for and download your certificate of analysis for the selected product here. Please provide your batch number.
The following analysis certificates have been found:

Type analysis

Appearance of solutionclear red
pH-transition range6.8 (red)- 8.0 yellow)
Maximum absorption528-558 nm
Suitability for microscopycomplies