5 



Alcohols and Ethers. 

 1200 General. (See also Q IGO:)). 

 1210 Paniffin-ols. 

 1220 Unsaturated open chain-ols. 

 1230 Benzenoid-ols. 

 1240 Reduced benzenoid-o]^. C^'clic-ols other tliin 



benzenoid-ols. 

 1250 Unclassified alcohols. 

 Each of these divisions shall be subdivided into ols, di-ols, 

 tri-ols, &c., each of which shall be further subdivided as under 

 hydrocarbons. 



Haloid and allied derivatives of alcohols, thienols and selenols, 

 ■&.C., shall be entered under correspomling- alcohols. 



Ethers shall be entered under the alcohols from which they 

 are derived, also ethereal salts of inorganic acids and of the 

 cyanic acids. 



Acids. 



1300 General. {See also Q l.jUO-l.jJu). 



1310 Paraffin acids. 



1320 Unsaturated open chain acids. 



1330 BeuzHuoid acids. 



1340 Reduced benzenoid acids. Cyclic acids other than 



benzenoid acids. 

 1350 Unclassified acids. 

 Each of these divisions shall be subdivided according* to the 

 number of oxyg-en atoms present in the acid, further subdivision 

 being- carried out as in the case of the hydrocarbons from which 

 the acids may be considered to be derived by substitution of 

 hydi-og-en by carboxyj, SO3II, &c. 



The position of the acid in the isolog'ous series shall be deduced 

 from the empirical formula. The euipirical or, if possible, the 

 structural formula should follow the registration number. 



Sulphinic and sulphonic acids shall le included under acids in 

 the subdivisions of the corresponding carboxy acids. 



Derivatives of acids shall as far as possible be included imder 

 acids, such as haloid and allied derivatives, hydroxy' and auiiuo- 

 acids, aldehydic and keto-acids, ethereal salts, acid chlorides, 

 acid-amides, oxides, &c. 



Aldehydes. 

 1400 General. 

 1410 Paralliu-als. 

 1420 Unsaturated t)pen chaiu-als. 

 1430 Benzenoid-als. 

 1440 Reduced benzenoid and cyclic-als other than 



benzenoid-als. 

 1450 Uiiclassiiied aldehydi's. 

 Each of these divisions shall be subdivided accordiu^v t<> the 

 iinmber of oxygen atoms present in the aldehyde, further s ib- 

 -(.livision being carried out as in the case oi livdrocarbou'*. 



