643768-39-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 643768-39-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,4,3,7,6 and 8 respectively; the second part has 2 digits, 3 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 643768-39:
(8*6)+(7*4)+(6*3)+(5*7)+(4*6)+(3*8)+(2*3)+(1*9)=192
192 % 10 = 2
So 643768-39-2 is a valid CAS Registry Number.