641604-15-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 641604-15-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,4,1,6,0 and 4 respectively; the second part has 2 digits, 1 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 641604-15:
(8*6)+(7*4)+(6*1)+(5*6)+(4*0)+(3*4)+(2*1)+(1*5)=131
131 % 10 = 1
So 641604-15-1 is a valid CAS Registry Number.