Jump to content Jump to navigation menu

o-Cresol red, 5 g

Pack Qty.
Empirical formula C21H18O5S
Molar mass (M) 382,44 g/mol
Melting point (mp) >300 °C
CAS No. 1733-12-6
EG-Nr. 217-064-2

Indicator pH 0,2-1,8 and pH 7,0-8,8
Dissolve 0.1 g in 100 ml ethanol (20 %) or 0.04 g in 1.05 ml NaOH 0.1 mol/l and make up to 100 ml with water

€21.40/Pack Qty. 

excl. VAT. | 5 g per Pack Qty.

Art. No. KK15.1

In stock
Delivery fast, simple and reliable!
from 6 Pack Qty. €20.33/Pack Qty.
from 24 Pack Qty. €19.26/Pack Qty.
Carl Roth subscription service

Now recurring orders conveniently delivered as a subscription!

With the new Carl Roth Replenishment Service you can let products be ordered automatically which you need regularly in your lab!

How it works:

Put all products for your subscription in the desired quantity in the basket.


In the shopping cart, select the option "Order shopping cart as subscription" Order as subscription.


Set Starty point and interval for your subscription and submit order!

By the way: Through your account you can customize or delete your subscriptions anytime.

Product details

o-Cresol red p.a.

Technical Information
Colour conversion red - yellow 
orange - purple 
Transition range pH 0,2 - 1,8 
7,0 - 8,8 
o-Cresol red
Selected quantity:   0
  1. Subtotal:  0.00
Art. No. Pack Qty. Pack. Price Quantity
KK15.1 5 g glass


KK15.2 10 g glass


KK15.3 25 g glass


In stock
In procurement
Not available
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

Appearancegreen to dark red to dark brown powder
Maximum absorption568-576 nm
Transition range7.0 (orange) - 8.8 (purple)