125-31-5 Usage
Uses
Used in Chemical Analysis:
P-XYLENOL BLUE is used as an indicator in chemical analysis for detecting changes in pH levels. It exhibits different colors at various pH values, such as red at pH 1.2, yellow at pH 2.8, and blue at pH 9.6.
Used in Drug Testing Industry:
P-XYLENOL BLUE is used as a detection agent for identifying the presence of opioids and other narcotics in methods and devices that rely on color changes to indicate the presence of these substances.
Check Digit Verification of cas no
The CAS Registry Mumber 125-31-5 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 1,2 and 5 respectively; the second part has 2 digits, 3 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 125-31:
(5*1)+(4*2)+(3*5)+(2*3)+(1*1)=35
35 % 10 = 5
So 125-31-5 is a valid CAS Registry Number.
InChI:InChI=1/C23H22O5S/c1-13-11-20(24)15(3)9-18(13)23(19-10-16(4)21(25)12-14(19)2)17-7-5-6-8-22(17)29(26,27)28/h5-12,24H,1-4H3,(H,26,27,28)/b23-19+
125-31-5Relevant articles and documents
Solvent-free one-pot synthesis of sulfonephthaleins from saccharin and phenols
Tillu,Dumbre,Borate,Wakharkar,Choudhary
experimental part, p. 1101 - 1107 (2012/05/05)
Sulfonephthaleins can be synthesized in a single pot from saccharin and phenol via the in situ formation of 2-sulfobenzoic anhydride, followed by its reaction with phenol using H2SO4 as the condensing agent, in the absence of any solvent. This solvent-free synthesis is more economical and environmentally benign. Copyright Taylor & Francis Group, LLC.
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.
