2303-01-7 Usage
Chemical Properties
green crystalline powder
Uses
m-Cresol Purple acts as a pH indicator dye. It plays an important role in spectrophotometric pH measurements. It operates in the pH ranges 1.2 - 2.8 (red to yellow) and 7.4 - 9.0 (yellow to violet). Further, it is employed to stain epithelial cells and proteins.
Biochem/physiol Actions
m-Cresol purple is a pH indicator. It changes from red (pH 1.2) to yellow (2.8) and yellow (7.4) to purple (9.0).
Check Digit Verification of cas no
The CAS Registry Mumber 2303-01-7 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 2,3,0 and 3 respectively; the second part has 2 digits, 0 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 2303-01:
(6*2)+(5*3)+(4*0)+(3*3)+(2*0)+(1*1)=37
37 % 10 = 7
So 2303-01-7 is a valid CAS Registry Number.
InChI:InChI=1/C22H18O4/c1-13-11-15(23)7-9-18(13)22(19-10-8-16(24)12-14(19)2)20-6-4-3-5-17(20)21(25)26-22/h3-12,23-24H,1-2H3
2303-01-7Relevant 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.
