133957-42-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 133957-42-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,3,9,5 and 7 respectively; the second part has 2 digits, 4 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 133957-42:
(8*1)+(7*3)+(6*3)+(5*9)+(4*5)+(3*7)+(2*4)+(1*2)=143
143 % 10 = 3
So 133957-42-3 is a valid CAS Registry Number.