Ketones. 



]500 General. 



1510 Paraffin-ons. 



1520 Unsaturated open thain-ons. 



1530 Benzenoid-ons. 



1540 Eeduced benzenoid and cyclic-ons other than 

 benzenoid-ons. 



1550 Unclassified ketones. 

 Each of these divisions sliali be subdivided according' to the 

 number of oxygen atoms present in the keto-compound, further 

 subdivision being' carried out as in the case of hydrocarbons. 



Amino- Compounds. 

 1600 General. 

 IGIO Amino-parafilins. 



1620 Amino-derivatives of unsaturated open chain hydro- 

 carbons. 

 1630 Amiuo-derivatives of benzenoid hydrocarbons. 

 1640 Amino-derivatives of reduced benzenoid and cyclic- 

 hydrocarbons. 

 1650 Unclassified amino-conipounds. 

 1660 Imides, imido-ethers, <ic. 

 Eacli of the divisions 1610-1640 shall be subdivided iutc^ 

 nionamino- diamino-, &c., derivatives, which shall be arranged 

 as in other series. 



Hydroxylaniine derivatives shall constitute a sub-section of 

 the monamino- ; hydrazine derivatives, amidines and amidoxims 

 a sub-section of the diamino ; and diazoimide (NaH) derivatives 

 a sub-section of the triamino-deiivatives. 



Secondary and teitiary amines shall be entered under the 

 primary amines from which they are derived. 



Ammonium derivatives shall be entered under the corre- 

 spending amino-derivatives. 



Azo Compounds. 



1700 General. 



1710 Azo-corapounds (open chain). 

 1720 ,, „ (closed chain). 



1730 Diazo-conipounds (open chain). 

 1740 „ „ (closed chain). 



1750 Unclassified azo-compouuds. 

 Hydrazo- and oxyazo- con)])Ounds shall be entered under 

 corresponding azo-deriva1ives. 



All compounds containing the azo-groujiing (/.e., di^azo, &c.) 

 shall be classified in this section. 



The empirical formulfe of the compounc's in the divisions llOO 

 to 1750 must be given. 



