641604-58-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 641604-58-2 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, 5 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 641604-58:
(8*6)+(7*4)+(6*1)+(5*6)+(4*0)+(3*4)+(2*5)+(1*8)=142
142 % 10 = 2
So 641604-58-2 is a valid CAS Registry Number.