3972-42-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 3972-42-7 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 3,9,7 and 2 respectively; the second part has 2 digits, 4 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 3972-42:
(6*3)+(5*9)+(4*7)+(3*2)+(2*4)+(1*2)=107
107 % 10 = 7
So 3972-42-7 is a valid CAS Registry Number.