21956-76-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 21956-76-3 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 6 respectively; the second part has 2 digits, 7 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 21956-76:
(7*2)+(6*1)+(5*9)+(4*5)+(3*6)+(2*7)+(1*6)=123
123 % 10 = 3
So 21956-76-3 is a valid CAS Registry Number.