1642144-75-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1642144-75-9 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,6,4,2,1,4 and 4 respectively; the second part has 2 digits, 7 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 1642144-75:
(9*1)+(8*6)+(7*4)+(6*2)+(5*1)+(4*4)+(3*4)+(2*7)+(1*5)=149
149 % 10 = 9
So 1642144-75-9 is a valid CAS Registry Number.