1217440-57-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1217440-57-7 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,1,7,4,4 and 0 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 1217440-57:
(9*1)+(8*2)+(7*1)+(6*7)+(5*4)+(4*4)+(3*0)+(2*5)+(1*7)=127
127 % 10 = 7
So 1217440-57-7 is a valid CAS Registry Number.