639070-34-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 639070-34-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,3,9,0,7 and 0 respectively; the second part has 2 digits, 3 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 639070-34:
(8*6)+(7*3)+(6*9)+(5*0)+(4*7)+(3*0)+(2*3)+(1*4)=161
161 % 10 = 1
So 639070-34-1 is a valid CAS Registry Number.