benzoic acid C7H6O2 (or C6H5COOH), is a colorless crystalline solid and the simplest aromatic carboxylic acid. The name derived from gum benzoin, which was for a long time the only source for benzoic acid. Its salts are used as a food preservative and benzoic acid is an important precursor for the synthesis of many other organic substances. The salts and esters of benzoic acid are known as benzoates.
	 
	
		
			
				 
			
					ITEM 
				 
				
					STANDARD 
				 
			
				 
			
					Characteristics
				 
				
					White crystallized powder
				 
			
				 
			
					Content >=%
				 
				
					99.5
				 
			
				 
			
					Melting point
				 
				
					121-124℃
				 
			
				 
			
					Loss on drying  =< %
				 
				
					0.5
				 
			
				 
			
					Sulfate =< %
				 
				
					0.1
				 
			
				 
			
					Burnt Residue  =< PPM
				 
				
					300
				 
			
				 
			
					Chlorides =< %
				 
				
					0.02
				 
			
				 
			
					Heavy metals(As Pb)  =< PPM
				 
				
					10
				 
			
				 
			
					Arsenic =<%
				 
				
					0.0003
				 
			
				 
			
					Lead =< ppm
				 
				
					5
				 
			
				 
			
					Mercury =< ppm
				 
				
					1
				 
			
				 
			
					Oxidisable substances
				 
				
					Passing test
				 
			
				 
			
					Carbonisable substances =<
				 
				
					Y5
				 
			
				 
		
	
					Colour of solution =<
				 
				
					B9