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Pyrogallol red, also known as pyrogallol red S, is a chemical compound with the formula C20H12O7S2. It is a red-colored, water-soluble dye that is commonly used as a pH indicator in titrations. Pyrogallol red changes color in the pH range of 2.2 to 3.8, turning from yellow to red as the pH decreases. It is particularly useful for detecting the endpoint in acid-base titrations involving weak acids and strong bases. The compound is also employed in various analytical applications, such as the determination of metal ions and the analysis of organic compounds. However, it is important to note that pyrogallol red can be harmful if ingested or inhaled, and it should be handled with care, following proper safety procedures.

3172-49-4

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3172-49-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 3172-49-4 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 3,1,7 and 2 respectively; the second part has 2 digits, 4 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 3172-49:
(6*3)+(5*1)+(4*7)+(3*2)+(2*4)+(1*9)=74
74 % 10 = 4
So 3172-49-4 is a valid CAS Registry Number.

3172-49-4SDS

SAFETY DATA SHEETS

According to Globally Harmonized System of Classification and Labelling of Chemicals (GHS) - Sixth revised edition

Version: 1.0

Creation Date: Aug 16, 2017

Revision Date: Aug 16, 2017

1.Identification

1.1 GHS Product identifier

Product name PYROGALLOL RED

1.2 Other means of identification

Product number -
Other names PYROGALLOSULFONPHTHALEIN

1.3 Recommended use of the chemical and restrictions on use

Identified uses For industry use only.
Uses advised against no data available

1.4 Supplier's details

1.5 Emergency phone number

Emergency phone number -
Service hours Monday to Friday, 9am-5pm (Standard time zone: UTC/GMT +8 hours).

More Details:3172-49-4 SDS

3172-49-4Downstream Products

3172-49-4Relevant academic research and scientific papers

Ti(IV) doping: An effective strategy to boost Lewis acidic performance of ZnO catalyst in fluorescein dye synthesis

Jadhav, Nirajkumar H.,Shinde, Dnyaneshwar R.,Sakate, Sachin S.,Rasal, Nishant K.,Pawar, Ramdas A.

, p. 17 - 22 (2018/11/25)

Zn1-xTixO NPs were efficiently synthesized using a simple solution free mechanochemical method. The synthesized ZnO and Ti(IV)-doped ZnO catalysts are exhibited polycrystallinity, a hexagonal crystal structure, and roughly spherical agglomerates. The surface areas of the Zn1-xTixO catalysts were positively correlated with the doping percentage of Ti(IV), which also enhanced the Lewis acidity of the NPs. The catalysts exhibited excellent activity during the synthesis of fluorescein dyes. This methodology was also extended to sulfone-fluorescein dye synthesis.

Solvent-free synthesis of sulfonephthaleins, sulfonefluoresceins and fluoresceins under microwave irradiation

Cihelnik, Simon,Stibor, Ivan,Lhotak, Pavel

, p. 1779 - 1789 (2007/10/03)

An efficient solvent-free synthesis of sulfonephthaleins, sulfonefluoresceins and fluoresceins under microwave irradiation is reported.

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