1289557-80-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1289557-80-7 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,8,9,5,5 and 7 respectively; the second part has 2 digits, 8 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 1289557-80:
(9*1)+(8*2)+(7*8)+(6*9)+(5*5)+(4*5)+(3*7)+(2*8)+(1*0)=217
217 % 10 = 7
So 1289557-80-7 is a valid CAS Registry Number.