72138-63-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 72138-63-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,2,1,3 and 8 respectively; the second part has 2 digits, 6 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 72138-63:
(7*7)+(6*2)+(5*1)+(4*3)+(3*8)+(2*6)+(1*3)=117
117 % 10 = 7
So 72138-63-7 is a valid CAS Registry Number.