1821688-56-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1821688-56-5 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,8,2,1,6,8 and 8 respectively; the second part has 2 digits, 5 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 1821688-56:
(9*1)+(8*8)+(7*2)+(6*1)+(5*6)+(4*8)+(3*8)+(2*5)+(1*6)=195
195 % 10 = 5
So 1821688-56-5 is a valid CAS Registry Number.