2105904-82-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 2105904-82-1 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 2,1,0,5,9,0 and 4 respectively; the second part has 2 digits, 8 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 2105904-82:
(9*2)+(8*1)+(7*0)+(6*5)+(5*9)+(4*0)+(3*4)+(2*8)+(1*2)=131
131 % 10 = 1
So 2105904-82-1 is a valid CAS Registry Number.