1421771-74-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1421771-74-5 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,4,2,1,7,7 and 1 respectively; the second part has 2 digits, 7 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 1421771-74:
(9*1)+(8*4)+(7*2)+(6*1)+(5*7)+(4*7)+(3*1)+(2*7)+(1*4)=145
145 % 10 = 5
So 1421771-74-5 is a valid CAS Registry Number.