642994-58-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 642994-58-9 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, 5 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 642994-58:
(8*6)+(7*4)+(6*2)+(5*9)+(4*9)+(3*4)+(2*5)+(1*8)=199
199 % 10 = 9
So 642994-58-9 is a valid CAS Registry Number.