838840-40-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 838840-40-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 8,3,8,8,4 and 0 respectively; the second part has 2 digits, 4 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 838840-40:
(8*8)+(7*3)+(6*8)+(5*8)+(4*4)+(3*0)+(2*4)+(1*0)=197
197 % 10 = 7
So 838840-40-7 is a valid CAS Registry Number.