21687-95-6 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 21687-95-6 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,6,8 and 7 respectively; the second part has 2 digits, 9 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 21687-95:
(7*2)+(6*1)+(5*6)+(4*8)+(3*7)+(2*9)+(1*5)=126
126 % 10 = 6
So 21687-95-6 is a valid CAS Registry Number.