737721-20-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 737721-20-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 7,3,7,7,2 and 1 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 737721-20:
(8*7)+(7*3)+(6*7)+(5*7)+(4*2)+(3*1)+(2*2)+(1*0)=169
169 % 10 = 9
So 737721-20-9 is a valid CAS Registry Number.