Jump to content Jump to navigation menu

Thymolphthalein, 50 g

p.a., ACS
Pack Qty.
Empirical formula C28H30O4
Molar mass (M) 430,55 g/mol
Density (D) 1,111 g/cm³
Melting point (mp) 253 °C
CAS No. [125-20-2]
EG-Nr. 204-729-7

Indicator pH 8.8-10.5
Dissolve 0.1 g in 100 ml of ethanol (50 %)

€130.65/Pack Qty. 

excl. VAT. | 50 g per Pack Qty.

Art. No. HN97.3

In stock
Delivery fast, simple and reliable!
from 6 Pack Qty. €124.12/Pack Qty.
from 24 Pack Qty. €117.58/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

Thymolphthalein p.a., ACS

Technical Information
Colour conversion colourless - blue 
Handling area pH 8,8 - 10,5 
Selected quantity:   0
  1. Subtotal:  0.00
Order No. Pack Qty. Pack. Price Quantity
HN97.1 5 g glass €21.00
HN97.2 10 g glass €35.40
HN97.3 50 g glass €130.65
In stock
Available at short notice
Not available
Delivery date currently unknown
Selected quantity:   0
  1. Subtotal:  0.00

Downloads / MSDS

General information

Acid Value Determination

The acid number characterises the acidic components of the fats. For this purpose, the sample is dissolved in a solvent and titrated against phenolphthalein with potassium hydroxide solution. Only free fatty acids are recorded. The fatty acids bound in the glycerides are not determined.

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

pH-transition range8,8 (clear)-10,5 (blue)
Appearance of solutioncomplies

0 Reviews

0.0 out of five stars