256957-38-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 256957-38-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,5,6,9,5 and 7 respectively; the second part has 2 digits, 3 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 256957-38:
(8*2)+(7*5)+(6*6)+(5*9)+(4*5)+(3*7)+(2*3)+(1*8)=187
187 % 10 = 7
So 256957-38-7 is a valid CAS Registry Number.