3871-42-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 3871-42-9 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 3,8,7 and 1 respectively; the second part has 2 digits, 4 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 3871-42:
(6*3)+(5*8)+(4*7)+(3*1)+(2*4)+(1*2)=99
99 % 10 = 9
So 3871-42-9 is a valid CAS Registry Number.