856121-21-6 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 856121-21-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 8,5,6,1,2 and 1 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 856121-21:
(8*8)+(7*5)+(6*6)+(5*1)+(4*2)+(3*1)+(2*2)+(1*1)=156
156 % 10 = 6
So 856121-21-6 is a valid CAS Registry Number.