901659-81-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 901659-81-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 9,0,1,6,5 and 9 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 901659-81:
(8*9)+(7*0)+(6*1)+(5*6)+(4*5)+(3*9)+(2*8)+(1*1)=172
172 % 10 = 2
So 901659-81-2 is a valid CAS Registry Number.