1219971-97-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1219971-97-7 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,1,9,9,7 and 1 respectively; the second part has 2 digits, 9 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 1219971-97:
(9*1)+(8*2)+(7*1)+(6*9)+(5*9)+(4*7)+(3*1)+(2*9)+(1*7)=187
187 % 10 = 7
So 1219971-97-7 is a valid CAS Registry Number.