639806-67-0 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 639806-67-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,3,9,8,0 and 6 respectively; the second part has 2 digits, 6 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 639806-67:
(8*6)+(7*3)+(6*9)+(5*8)+(4*0)+(3*6)+(2*6)+(1*7)=200
200 % 10 = 0
So 639806-67-0 is a valid CAS Registry Number.