15664-02-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 15664-02-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,5,6,6 and 4 respectively; the second part has 2 digits, 0 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 15664-02:
(7*1)+(6*5)+(5*6)+(4*6)+(3*4)+(2*0)+(1*2)=105
105 % 10 = 5
So 15664-02-5 is a valid CAS Registry Number.