19662-71-6 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 19662-71-6 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,9,6,6 and 2 respectively; the second part has 2 digits, 7 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 19662-71:
(7*1)+(6*9)+(5*6)+(4*6)+(3*2)+(2*7)+(1*1)=136
136 % 10 = 6
So 19662-71-6 is a valid CAS Registry Number.
InChI:InChI=1/C19H20O5/c1-5-11(2)18(21)24-19(3,4)16-9-13-8-12-6-7-17(20)23-14(12)10-15(13)22-16/h5-8,10,16H,9H2,1-4H3/b11-5+/t16-/m0/s1