216658-52-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 216658-52-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,1,6,6,5 and 8 respectively; the second part has 2 digits, 5 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 216658-52:
(8*2)+(7*1)+(6*6)+(5*6)+(4*5)+(3*8)+(2*5)+(1*2)=145
145 % 10 = 5
So 216658-52-5 is a valid CAS Registry Number.