Hot Selling 99% Purity Bromophenol Blue for Acid-Base Indicator CAS 115-39-9

• CAS No.: 115-39-9
• Formula: C19h10br4o5s
• EINECS: 204-086-2
• Classification: Organic Analytical Reagents
• Grade: Ind
• Specific Usage: For Biological Purpose, Technical Grade
• Model NO.: IND
• Content: Standard
• Usage: Laboratory Reagents, Analytical Reagents
• Source: Concrete
• Habit Appellation: Fine Chemicals
• Application: Scientific Research
• Property: Organic Reagent
• Transport Package: 25 Kgs Fiber Drums
• Specification: 99.5%
• Trademark: Sinochembt
• Origin: Shenyang
• HS Code: 29349990
• Production Capacity: 500kgs Per Month

Product Description

Bromophenol blue (3′,3″,5′,5″-tetrabromophenolsulfonphthalein, BPB), albutest is used as a pH indicator, an electrophoretic color marker, and a dye. It can be prepared by slowly adding excess br omine to a hot solution of phenolsulfonphthalein in glacial acetic acid.

Acid-base indicator

Bromophenol blue (pH indicator)
below pH 3.5		above pH 4.6
3.5	⇌	4.6

As an acid-base indicator, its useful range lies between pH 3.0 and 4.6. It changes from yellow at pH 3.0 to blue at pH 4.6; this reaction is reversible. Bromophenol blue is structurally related to phenolphthalein (a popular indicator).
GB/T 12592-90

                                                
                                                       (AR)
Appearance                                  Tan to Orange Powder
Infrared spectrum                         Conforms to structure
Claroty of solution                        Pass
Visual transition interval               pH3.0(yellow)- pH4.6(blue)


ltem   
(Ind)
pHVisnal transition interval           3.0()~4.6()
Mass absorptivity,L/cm·g              ≥115
Solubility in ethanol              
()Ignition residue,%                      ≤0.25


                                                   ACS    
                                                  (ACS Grade)
Appearance                                  
Infrared spectrometry              
Claroty of solution                      
Visual transition interval              pH3.0()- pH4.6()