740840-81-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 740840-81-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 7,4,0,8,4 and 0 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 740840-81:
(8*7)+(7*4)+(6*0)+(5*8)+(4*4)+(3*0)+(2*8)+(1*1)=157
157 % 10 = 7
So 740840-81-7 is a valid CAS Registry Number.