82-69-9 Usage
Preparation
Preparation by hydrolysis of 7-hydroxy-8-(o-hydroxybenzoyl)- 4-methylcoumarin with sodium hydroxide in dilute ethanol (52%).
Check Digit Verification of cas no
The CAS Registry Mumber 82-69-9 includes 5 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 2 digits, 8 and 2 respectively; the second part has 2 digits, 6 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 82-69:
(4*8)+(3*2)+(2*6)+(1*9)=59
59 % 10 = 9
So 82-69-9 is a valid CAS Registry Number.