Bromothymol Blue CAS 76-59-5 3′, 3′′-Dibromothymolsulfonephthalein Btb

• CAS No.: 76-59-5
• Formula: C27h28br2o5s
• EINECS: 200-971-2
• Classification: Organic Analytical Reagents
• Grade: AR
• Specific Usage: For Synthesis
• Model NO.: SUREST-126
• Content: Standard
• Usage: Laboratory Reagents, Analytical Reagents, Diagnostic Reagents, Teaching Reagents
• Source: Dry Powder
• Habit Appellation: Special Reagent
• Application: Industry, Scientific Research, Health, Environmental Protection, Agriculture
• Property: Organic Reagent
• Shelf Life: 2 Years
• Stock: Available
• Molecular Weight: 624.38
• Color: Pink
• Water Solubility: Slightly Soluble
• Melting Point: 204 ºC
• Transport Package: 25kg /Drum
• Specification: 98%min
• Trademark: Surest
• Origin: China
• HS Code: 3212900000
• Production Capacity: 1000 Tons Yearly

Product Description

 
 Bromothymol Blue

Name	Bromothymol Blue
Synonyms	3',3''-Dibromothymolsulfonephthalein; BTB
Molecular Structure
Molecular Formula	C27H28Br2O5S
Molecular Weight	624.38
CAS Registry Number	76-59-5
EINECS	200-971-2

Properties

Melting point	204 ºC
Water solubility	slightly soluble

Chemical Property/Description
Purple to pink powder,It is an organic pigment with good dyeing effect and stability.

A common preparation is by brominating bromothymol and then coupling it with a suitable aromatic aldehyde compound or aromatic amine. The preparation process requires appropriate catalyst and solvent to promote the reaction.

It is an indicator used in the determination of weak acid and weak base, which is yellow when acidic and blue when alkaline. Its acid-base balance is: C27H28Br2O5S H+ + C27H27Br2O5S Bromothymol blue has a pKa of 7.10.

Main Uses:

1. Used as acid-base indicator,pH discoloration range 6.0(yellow) ~ 7.6(blue). Also used for adsorption indicator.

2. Used as an extraction separating agent for spectrophotometric determination of quaternary ammonium cation.

It is widely used in textile, leather, paint, ink and other industries. It can be used as a dye, pigment and indicator to give certain materials a deep blue color.