280742-17-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 280742-17-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,8,0,7,4 and 2 respectively; the second part has 2 digits, 1 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 280742-17:
(8*2)+(7*8)+(6*0)+(5*7)+(4*4)+(3*2)+(2*1)+(1*7)=138
138 % 10 = 8
So 280742-17-8 is a valid CAS Registry Number.