438217-89-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 438217-89-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 4,3,8,2,1 and 7 respectively; the second part has 2 digits, 8 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 438217-89:
(8*4)+(7*3)+(6*8)+(5*2)+(4*1)+(3*7)+(2*8)+(1*9)=161
161 % 10 = 1
So 438217-89-1 is a valid CAS Registry Number.