o D 



Aicoliols and Ethers. 

 J 200 General. (Sec a/so Q 160b). 

 1210 Paraffin-ols. 

 1220 Unsaturated open chain-ols. 

 1230 Benzenoid-ols. 

 1240 Reduced benzenoid-ols. Cyclic-ols other than 



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 corresponding- alcohols. 



Ethers shall be entered under the alcohols from which they 

 are derived, also ethereal salts of inorg-anic acids and of the 

 cyanic acids. 



Acids. 



1300 General. {See also Q 1500-1550). 



1310 Paraffin acids. 



1320 Unsaturated open chain acids. 



1330 Beuzeuoid 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 oxygen atoms present iu the acid, further subdivision 

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

 the acids ma^' be considered to be derived by substitution of 

 hydrogen by carboxy], SO3H, &c. 



The position of the acid in the isologous series shall be deduced 

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

 structural formula should follow the registration number. 



Sulphinic and sulphonic acids shall be included under acids iu 

 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 amiuo- 

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

 acid-anfiides, oxides, &c. 



Aldehydes. 

 1400 General. 

 1410 Paraffin-als. 

 1420 Unsaturated open chain-als. 

 1430 Benzenoid-als. 

 1440 Reduced benzenoid and cyclic-als other than 



benzenoid-als. 

 1450 Unclassified aldehydes. 

 Each of these divisions shall be subdivided accorduig- to the 

 number of oxygen atoms present in the aldehyde, further sub- 

 division being carried out as in the case of hydrocarbons. 



