16993-69-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 16993-69-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,6,9,9 and 3 respectively; the second part has 2 digits, 6 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 16993-69:
(7*1)+(6*6)+(5*9)+(4*9)+(3*3)+(2*6)+(1*9)=154
154 % 10 = 4
So 16993-69-4 is a valid CAS Registry Number.