Ketones. 



1500 (leneral. 



1510 Paraffin-ons. 



1520 Unsaturated open chain-ons. 



1530 Benzenoid-ons. 



1540 Reduced bouzenoid and cyclic-ons other than 

 benzenoid-ons. 



1550 Unclassified l^etones. 

 Each of these divisions shall be subdivided according- to tlie 

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

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



Amino-Compounds. 



IGOO General. 

 1610 Amino-paraffins. 



1620 Amino-derivatives of unsaturated open chain hydro- 

 carbons. 

 1630 Amino-derivatives of benzenoid hydrocarbons. 

 1640 Amino-derivatives of reduced benzenoid and cyclic 



hydrocarbons. 

 1650 Unclassified amino-compounds. 

 1660 Imides, imido-ethers, &c. 

 Each of the divisions 1610-1640 shall be subdivided into 

 monainino- diamine-, &c., derivatives, which shall be arranged 

 as in other series. 



Hydroxy lauiine deiivatives 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 \\ iiich they are derived. 



Ammonium derivatives shall be entered under the corre- 

 spending- amino-derivatives. 



Azo-Compounds. 



1 700 General. 



1710 Azo-corapounds (opien chain). 

 1720 „ „ (closed chain), 



1730 Diazo-compounds (open chain). 

 1740 „ ,, (closed chain). 



1750 Unclassified azo-compouuds. 

 Hydrazo- and oxyazo- compounds shall be entered under 

 corresponding- azo-derivatives. 



All compounds containing- the azo-grouping- {i.e., disazo, &c.) 

 shall be classified in this section. 



The empirical foimuloe of the compounds in the divisions 1700 

 to 1750 must be given. 



