639044-83-0 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 639044-83-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,3,9,0,4 and 4 respectively; the second part has 2 digits, 8 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 639044-83:
(8*6)+(7*3)+(6*9)+(5*0)+(4*4)+(3*4)+(2*8)+(1*3)=170
170 % 10 = 0
So 639044-83-0 is a valid CAS Registry Number.