- Asafoetida. Like most ‘drligs, asafee 
examined samples, in which there were ae 
_ consisting of whitish, brilliant particles aud of see ones wil 
former were calcite, the latter starite with black ee of alld 
“poor in chlorine” and to distinguishing even between ‘ ‘poor in’ chfontite! Bish: 
traces of chlorine”. oe question now was, up to what percentage a toe ) 
might be considered as “poor in chlorine”, on which subject the views vary con 
An acceptable proposition was to fix canean limits and to introduce three ; 
viz., free from chlorine, up to 0.02 per cent. chlorine and up to 0.2 ae cent. 
or Seaiply to guaranty a certain content of chlorine. 7 Oe a A 
This would be a solution, but it would then be necessary to know a me 
determining the content of chlorine. This is the most important point, for the ¢ 
" ation must be very exact and easily and quickly carried out. This applies 
specially to the wholesale. trade, where it is often a question of ace esis 
ee 
comparatively great quantity of benzalaldehyde must be tested, in which case e the t us 
methods, as for instance that of Carius, are either not applicable at all, or ‘they : 
far too complicated. In consequence, it is epesspls to determine uaa ely ! 
usual nesttatine analysis. | | ; 
It is evident that such a rethod does not help en on ‘the. contr ry 
quite unfit for our purpose, and if we here discuss it a little further it is 
Ep it to form potassium chloride, which can “then be Scteuniped qu at 
in the following way: 20 g. of benzaldehyde are boiled for abou 
1) Americ. Jowrn. Pharm. 91 (1919), 164, ah ad 
