3947-87-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 3947-87-3 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 3,9,4 and 7 respectively; the second part has 2 digits, 8 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 3947-87:
(6*3)+(5*9)+(4*4)+(3*7)+(2*8)+(1*7)=123
123 % 10 = 3
So 3947-87-3 is a valid CAS Registry Number.