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Phenol red, 5 g

p.a., ACS
Pack Qty.
Empirical formula C19H14O5S
Molar mass (M) 354,38 g/mol
Melting point (mp) >300 °C
CAS No. 143-74-8
EG-Nr. 205-609-7

Indicator pH 6.5-8.2
Dissolve 0.1 g in 100 ml ethanol (20 %) or 0.04 g in 1.13 ml NaOH 0.1 mol/l and fill up with water to 100 ml

€19.25/Pack Qty. 

excl. VAT. | 5 g per Pack Qty.

Art. No. T127.1

In stock
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from 6 Pack Qty. €18.29/Pack Qty.
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Product details

Phenol red p.a., ACS

Technical Information
Colour conversion yellow - red 
Transition range pH 6,5 - 8,2 
Phenol red
Selected quantity:   0
  1. Subtotal:  0.00
Art. No. Pack Qty. Pack. Price Quantity
T127.1 5 g glass


T127.2 25 g glass


T127.3 100 g glass


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In procurement
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Delivery date currently unknown
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:

Guarantee analysis

Transition range6,8 (yellow)-8,2 (red)
Loss on drying (110 °C)≤5,0 %
Appearance of solution (ACS)complies