646497-34-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 646497-34-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,4,6,4,9 and 7 respectively; the second part has 2 digits, 3 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 646497-34:
(8*6)+(7*4)+(6*6)+(5*4)+(4*9)+(3*7)+(2*3)+(1*4)=199
199 % 10 = 9
So 646497-34-9 is a valid CAS Registry Number.