1671-40-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1671-40-5 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,6,7 and 1 respectively; the second part has 2 digits, 4 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 1671-40:
(6*1)+(5*6)+(4*7)+(3*1)+(2*4)+(1*0)=75
75 % 10 = 5
So 1671-40-5 is a valid CAS Registry Number.