639089-73-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 639089-73-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,3,9,0,8 and 9 respectively; the second part has 2 digits, 7 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 639089-73:
(8*6)+(7*3)+(6*9)+(5*0)+(4*8)+(3*9)+(2*7)+(1*3)=199
199 % 10 = 9
So 639089-73-9 is a valid CAS Registry Number.