Synonym:   
		5′,5′′-Diisopropyl-2′,2′′-dimethylphenolphthalein
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CAS Number  125-20-2 
			 
		
	
		         	
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Empirical Formula (Hill Notation)  C28H30O4 
			 
		
	
	
		         		
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Molecular Weight  430.54 
			 
		
	
	
		
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 Beilstein Registry Number  359413 
			 
		
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 EC Number  204-729-7 
			 
		
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 MDL number  MFCD00005909 
			 
		
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 PubChem Substance ID  24847182
 
			 
Properties:
    
    
    
	  
    | Related Categories | 
    
   
	  
			
				 
					Analytical Reagents, 
					
						
				
				
				
				
				
				
			
				 
					Analytical/Chromatography, 
					
						
				
				
				
				
				
				
			
				 
					Cell Biology, 
					
						
				
				
				
				
				
				
			
				 
					Hematology and Histology, 
					
						
				
				
				
				
				
				
			
				 
					Indicators, 
					
				
					
				
			
		
		
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        		grade
				
		   
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        ACS reagent
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        		InChI Key
				
		   
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        LDKDGDIWEUUXSH-UHFFFAOYSA-N
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        		composition
				
		   
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        Dye content, 95% 
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        		clarity of soln
				
		   
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        passes test
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        		visual transition interval
				
		   
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        8.8 - 10.5, colorless to blue
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        		mp
				
		   
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        251-253 °C(lit.)
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        		absorption
				
		   
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        λmax 396 nm (2nd)
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        λmax 592 nm
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Description:
        		Packaging
				
				
		  	
        
        
        
        10, 50 g in poly bottle
        
    
	    
         
        		Application
				
				
		  	
        
        
        
        Thymolphthalein has been used as a pH indicator in [14C] urea breath test to determine when the CO2 trap is full.
        
    
	    
         
        		General description
				
				
		  	
        
        
        
        Thymolphthalein (5′, 5′′-Diisopropyl-2′, 2′′-dimethylphenolphthalein) is an acid-base indicator which is colorless in solutions with a pH below 8.5 and blue in solutions with a pH above 9.5. Thymolphthalein has been used as an indicator in periodate-thiosulfate reaction.
        
Safety:
	  
		
         Personal Protective Equipment 
        
        
         Eyeshields, Gloves, type N95 (US), type P1 (EN143) respirator filter
        
		 
    
 
 	   
	  
		
         RIDADR 
        
        
         NONH for all modes of transport