212831-55-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 212831-55-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,1,2,8,3 and 1 respectively; the second part has 2 digits, 5 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 212831-55:
(8*2)+(7*1)+(6*2)+(5*8)+(4*3)+(3*1)+(2*5)+(1*5)=105
105 % 10 = 5
So 212831-55-5 is a valid CAS Registry Number.