1219977-25-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1219977-25-9 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 7 respectively; the second part has 2 digits, 2 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 1219977-25:
(9*1)+(8*2)+(7*1)+(6*9)+(5*9)+(4*7)+(3*7)+(2*2)+(1*5)=189
189 % 10 = 9
So 1219977-25-9 is a valid CAS Registry Number.