642994-05-6 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 642994-05-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,4,2,9,9 and 4 respectively; the second part has 2 digits, 0 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 642994-05:
(8*6)+(7*4)+(6*2)+(5*9)+(4*9)+(3*4)+(2*0)+(1*5)=186
186 % 10 = 6
So 642994-05-6 is a valid CAS Registry Number.