21954-82-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 21954-82-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,9,5 and 4 respectively; the second part has 2 digits, 8 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 21954-82:
(7*2)+(6*1)+(5*9)+(4*5)+(3*4)+(2*8)+(1*2)=115
115 % 10 = 5
So 21954-82-5 is a valid CAS Registry Number.