1638178-87-6 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1638178-87-6 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,6,3,8,1,7 and 8 respectively; the second part has 2 digits, 8 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 1638178-87:
(9*1)+(8*6)+(7*3)+(6*8)+(5*1)+(4*7)+(3*8)+(2*8)+(1*7)=206
206 % 10 = 6
So 1638178-87-6 is a valid CAS Registry Number.