73257-91-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 73257-91-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,3,2,5 and 7 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 73257-91:
(7*7)+(6*3)+(5*2)+(4*5)+(3*7)+(2*9)+(1*1)=137
137 % 10 = 7
So 73257-91-7 is a valid CAS Registry Number.
InChI:InChI=1/C15H20N2O3.C7H8O3S/c1-12(18)16-14(11-17-7-9-20-10-8-17)15(19)13-5-3-2-4-6-13;1-6-2-4-7(5-3-6)11(8,9)10/h2-6,14H,7-11H2,1H3,(H,16,18);2-5H,1H3,(H,8,9,10)