642491-85-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 642491-85-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,4,2,4,9 and 1 respectively; the second part has 2 digits, 8 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 642491-85:
(8*6)+(7*4)+(6*2)+(5*4)+(4*9)+(3*1)+(2*8)+(1*5)=168
168 % 10 = 8
So 642491-85-8 is a valid CAS Registry Number.