666856-00-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 666856-00-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,6,6,8,5 and 6 respectively; the second part has 2 digits, 0 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 666856-00:
(8*6)+(7*6)+(6*6)+(5*8)+(4*5)+(3*6)+(2*0)+(1*0)=204
204 % 10 = 4
So 666856-00-4 is a valid CAS Registry Number.