20513-71-7 Usage
Uses
Suitable as pH-indicator.
Check Digit Verification of cas no
The CAS Registry Mumber 20513-71-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,0,5,1 and 3 respectively; the second part has 2 digits, 7 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 20513-71:
(7*2)+(6*0)+(5*5)+(4*1)+(3*3)+(2*7)+(1*1)=67
67 % 10 = 7
So 20513-71-7 is a valid CAS Registry Number.
InChI:InChI=1/C10H9NO2/c1-6-4-10(13)11-9-5-7(12)2-3-8(6)9/h2-5,12H,1H3,(H,11,13)
20513-71-7Relevant articles and documents
An efficient and practical procedure for the synthesis of 4-substituted coumarins
De, Surya K.,Gibbs, Richard A.
, p. 1231 - 1233 (2007/10/03)
BiCl3 is used as an efficient catalyst in the Pechmann condensation reaction of phenols with β-keto esters leading to the formation of coumarin derivatives in excellent yields under solvent-free conditions. Georg Thieme Verlag Stuttgart.
