33642-18-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 33642-18-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,3,6,4 and 2 respectively; the second part has 2 digits, 1 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 33642-18:
(7*3)+(6*3)+(5*6)+(4*4)+(3*2)+(2*1)+(1*8)=101
101 % 10 = 1
So 33642-18-1 is a valid CAS Registry Number.