256439-93-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 256439-93-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,5,6,4,3 and 9 respectively; the second part has 2 digits, 9 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 256439-93:
(8*2)+(7*5)+(6*6)+(5*4)+(4*3)+(3*9)+(2*9)+(1*3)=167
167 % 10 = 7
So 256439-93-7 is a valid CAS Registry Number.