131866-65-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 131866-65-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,1,8,6 and 6 respectively; the second part has 2 digits, 6 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 131866-65:
(8*1)+(7*3)+(6*1)+(5*8)+(4*6)+(3*6)+(2*6)+(1*5)=134
134 % 10 = 4
So 131866-65-4 is a valid CAS Registry Number.