171655-91-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 171655-91-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,7,1,6,5 and 5 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 171655-91:
(8*1)+(7*7)+(6*1)+(5*6)+(4*5)+(3*5)+(2*9)+(1*1)=147
147 % 10 = 7
So 171655-91-7 is a valid CAS Registry Number.
InChI:InChI=1/C16H20Cl2N2O/c1-20-11-4-6-16(20)13(9-19-21-2)12(8-11)10-3-5-14(17)15(18)7-10/h3,5,7,9,11-13,16H,4,6,8H2,1-2H3/b19-9+/t11-,12+,13+,16+/m0/s1