212309-91-6 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 212309-91-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,1,2,3,0 and 9 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 212309-91:
(8*2)+(7*1)+(6*2)+(5*3)+(4*0)+(3*9)+(2*9)+(1*1)=96
96 % 10 = 6
So 212309-91-6 is a valid CAS Registry Number.