203783-57-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 203783-57-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,3,7,8 and 3 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 203783-57:
(8*2)+(7*0)+(6*3)+(5*7)+(4*8)+(3*3)+(2*5)+(1*7)=127
127 % 10 = 7
So 203783-57-7 is a valid CAS Registry Number.