Code 2904
				SULPHONATED, NITRATED OR NITROSATED DERIVATIVES OF HYDROCARBONS, WHETHER OR NOT HALOGENATED
		
		
		
		
		
			
	SECTION VI. Products of the chemical or allied industries
		
		
 
		
		
				
						
 
		
		
			
			
							I. HYDROCARBONS AND THEIR HALOGENATED, SULPHONATED, NITRATED OR NITROSATED DERIVATIVES
						
		
				
						
	
 
		
		
			2904
			
							Sulphonated, nitrated or nitrosated derivatives of hydrocarbons, whether or not halogenated:
						
		
				
						
 
		
 
 
		
 
 
		
		
			
			
							perfluorooctane sulphonic acid, its salts and perfluorooctane sulphonyl fluoride: