138666-98-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 138666-98-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,8,6,6 and 6 respectively; the second part has 2 digits, 9 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 138666-98:
(8*1)+(7*3)+(6*8)+(5*6)+(4*6)+(3*6)+(2*9)+(1*8)=175
175 % 10 = 5
So 138666-98-5 is a valid CAS Registry Number.