2816-23-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 2816-23-1 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 2,8,1 and 6 respectively; the second part has 2 digits, 2 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 2816-23:
(6*2)+(5*8)+(4*1)+(3*6)+(2*2)+(1*3)=81
81 % 10 = 1
So 2816-23-1 is a valid CAS Registry Number.