1221349-90-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1221349-90-1 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,2,1,3,4 and 9 respectively; the second part has 2 digits, 9 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 1221349-90:
(9*1)+(8*2)+(7*2)+(6*1)+(5*3)+(4*4)+(3*9)+(2*9)+(1*0)=121
121 % 10 = 1
So 1221349-90-1 is a valid CAS Registry Number.