217792-91-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 217792-91-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,1,7,7,9 and 2 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 217792-91:
(8*2)+(7*1)+(6*7)+(5*7)+(4*9)+(3*2)+(2*9)+(1*1)=161
161 % 10 = 1
So 217792-91-1 is a valid CAS Registry Number.