164721-63-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 164721-63-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,6,4,7,2 and 1 respectively; the second part has 2 digits, 6 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 164721-63:
(8*1)+(7*6)+(6*4)+(5*7)+(4*2)+(3*1)+(2*6)+(1*3)=135
135 % 10 = 5
So 164721-63-5 is a valid CAS Registry Number.