2056-81-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 2056-81-7 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 2,0,5 and 6 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 2056-81:
(6*2)+(5*0)+(4*5)+(3*6)+(2*8)+(1*1)=67
67 % 10 = 7
So 2056-81-7 is a valid CAS Registry Number.