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Phenolphthalein disodium salt, also known as phenolphthalein, is a colorless, crystalline chemical compound widely used as a pH indicator. It is non-toxic and soluble in water, ethanol, and ether. In an acidic environment, phenolphthalein remains colorless, but it turns pink to deep red in alkaline conditions, typically when the pH is above 8.2. This property makes it a valuable tool in various applications, such as titration, pH testing, and quality control in industries like food, pharmaceuticals, and cosmetics. It is also used in the detection of counterfeit currency and as a stain in histology.

518-51-4

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518-51-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 518-51-4 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 5,1 and 8 respectively; the second part has 2 digits, 5 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 518-51:
(5*5)+(4*1)+(3*8)+(2*5)+(1*1)=64
64 % 10 = 4
So 518-51-4 is a valid CAS Registry Number.
InChI:InChI=1/C20H14O4.2Na/c21-15-9-5-13(6-10-15)19(14-7-11-16(22)12-8-14)17-3-1-2-4-18(17)20(23)24;;/h1-12,21H,(H,23,24);;/q;2*+1/p-2

518-51-4SDS

SAFETY DATA SHEETS

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

Version: 1.0

Creation Date: Aug 12, 2017

Revision Date: Aug 12, 2017

1.Identification

1.1 GHS Product identifier

Product name 3 3-Bis(P-Hydroxyphenyl)Phthalide Disodium Salt

1.2 Other means of identification

Product number -
Other names Phenolphthalein disodium salt

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:518-51-4 SDS

518-51-4Relevant academic research and scientific papers

CHLORINE-CONTAINING DIHYDROXY COMPOUNDS

Beev, A. A.,Mikitaev, A. K.,Afaunova, Z. I.,Korshak, V. V.

, p. 1953 - 1956 (2007/10/02)

The conditions (process time, concentration, and temperature) were determined for the synthesis of a series of dihydroxy compounds based on hexachlorobenzene, phenolphthalein, 9,9-bis(hydroxyphenyl)fluorene, di(4-hydroxyphenyl)methane, and 2,2-di(4-hydroxyphenyl)propane.The products are of interest as intermediates for the production of polymers with increased fire resistance.

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