219694-91-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 219694-91-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,1,9,6,9 and 4 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 219694-91:
(8*2)+(7*1)+(6*9)+(5*6)+(4*9)+(3*4)+(2*9)+(1*1)=174
174 % 10 = 4
So 219694-91-4 is a valid CAS Registry Number.