1637540-45-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1637540-45-4 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,6,3,7,5,4 and 0 respectively; the second part has 2 digits, 4 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 1637540-45:
(9*1)+(8*6)+(7*3)+(6*7)+(5*5)+(4*4)+(3*0)+(2*4)+(1*5)=174
174 % 10 = 4
So 1637540-45-4 is a valid CAS Registry Number.