66156-31-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 66156-31-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,6,1,5 and 6 respectively; the second part has 2 digits, 3 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 66156-31:
(7*6)+(6*6)+(5*1)+(4*5)+(3*6)+(2*3)+(1*1)=128
128 % 10 = 8
So 66156-31-8 is a valid CAS Registry Number.