643004-83-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 643004-83-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,4,3,0,0 and 4 respectively; the second part has 2 digits, 8 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 643004-83:
(8*6)+(7*4)+(6*3)+(5*0)+(4*0)+(3*4)+(2*8)+(1*3)=125
125 % 10 = 5
So 643004-83-5 is a valid CAS Registry Number.