1028740-57-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1028740-57-9 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,0,2,8,7,4 and 0 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 1028740-57:
(9*1)+(8*0)+(7*2)+(6*8)+(5*7)+(4*4)+(3*0)+(2*5)+(1*7)=139
139 % 10 = 9
So 1028740-57-9 is a valid CAS Registry Number.