31642-63-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 31642-63-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,1,6,4 and 2 respectively; the second part has 2 digits, 6 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 31642-63:
(7*3)+(6*1)+(5*6)+(4*4)+(3*2)+(2*6)+(1*3)=94
94 % 10 = 4
So 31642-63-4 is a valid CAS Registry Number.