1638769-41-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1638769-41-1 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,6,3,8,7,6 and 9 respectively; the second part has 2 digits, 4 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 1638769-41:
(9*1)+(8*6)+(7*3)+(6*8)+(5*7)+(4*6)+(3*9)+(2*4)+(1*1)=221
221 % 10 = 1
So 1638769-41-1 is a valid CAS Registry Number.