1643439-37-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1643439-37-5 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,6,4,3,4,3 and 9 respectively; the second part has 2 digits, 3 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 1643439-37:
(9*1)+(8*6)+(7*4)+(6*3)+(5*4)+(4*3)+(3*9)+(2*3)+(1*7)=175
175 % 10 = 5
So 1643439-37-5 is a valid CAS Registry Number.