1305257-87-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1305257-87-7 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,3,0,5,2,5 and 7 respectively; the second part has 2 digits, 8 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 1305257-87:
(9*1)+(8*3)+(7*0)+(6*5)+(5*2)+(4*5)+(3*7)+(2*8)+(1*7)=137
137 % 10 = 7
So 1305257-87-7 is a valid CAS Registry Number.