220156-12-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 220156-12-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,0,1,5 and 6 respectively; the second part has 2 digits, 1 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 220156-12:
(8*2)+(7*2)+(6*0)+(5*1)+(4*5)+(3*6)+(2*1)+(1*2)=77
77 % 10 = 7
So 220156-12-7 is a valid CAS Registry Number.