664987-44-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 664987-44-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,6,4,9,8 and 7 respectively; the second part has 2 digits, 4 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 664987-44:
(8*6)+(7*6)+(6*4)+(5*9)+(4*8)+(3*7)+(2*4)+(1*4)=224
224 % 10 = 4
So 664987-44-4 is a valid CAS Registry Number.