165899-69-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 165899-69-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,6,5,8,9 and 9 respectively; the second part has 2 digits, 6 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 165899-69:
(8*1)+(7*6)+(6*5)+(5*8)+(4*9)+(3*9)+(2*6)+(1*9)=204
204 % 10 = 4
So 165899-69-4 is a valid CAS Registry Number.