66646-99-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 66646-99-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,6,6,4 and 6 respectively; the second part has 2 digits, 9 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 66646-99:
(7*6)+(6*6)+(5*6)+(4*4)+(3*6)+(2*9)+(1*9)=169
169 % 10 = 9
So 66646-99-9 is a valid CAS Registry Number.
66646-99-9Relevant articles and documents
A cyclodehydration route to 2-aminochromones
Morris,Wishka,Fang
, p. 849 - 858 (1994)
Cyclodehydration of a series of salicylacetamides with triflic anhydride efficiently provided the corresponding 2-aminochromone. The use of polyphosphoric ester for this process was somewhat less effective.
