Good Quality with Low Price Thymol Blue 76-61-9

• CAS No.: 76-61-9
• Formula: C27h30o5s
• EINECS: 200-973-3
• Classification: Organic Analytical Reagents
• Grade: Indicator
• Specific Usage: For Biological Purpose, For Scintillation
• Model NO.: IND
• Content: Standard
• Usage: Laboratory Reagents, Analytical Reagents
• Source: Concrete
• Habit Appellation: Thymol Blue 76-61-9 pH Indicator
• Application: Scientific Research
• Property: Organic Reagent
• Molecular Weight: 466.59
• Melting Point: 221–224 °c
• Solubility in Water: Insoluble
• Appearance: Brownish-Green Crystal Powder
• Transport Package: 25 Kgs Fiber Drums
• Specification: 99.5%
• Trademark: Sinochembt
• Origin: Shenyang
• HS Code: 29270000
• Production Capacity: 500kgs Per Month

Product Description

Thymol blue (thymolsulfonephthalein) is a brownish-green or reddish-brown crystalline powder that is used as a pH indicator. It is insoluble in water but soluble in alcohol and dilute alkali solutions.

Thymol blue (pH indicator)
below pH 8.0		above pH 9.6
8.0	⇌	9.6

Thymol blue (pH indicator)
below pH 1.2		above pH 2.8
1.2	⇌	2.8

It transitions from red to yellow at pH 1.2-2.8 and from yellow to blue at pH 8.0-9.6. It is usually a component of Universal indicator.

At wavelength (378 - 382) nm, extinction coefficient > 8000 and at wavelength (298 - 302) nm , the extinction coefficient > 12000

GB/T 15352-94      
Item                                         (IND)                                       
pH Visual transition interval: 1.2(Red)~2.8(Yellow)
                                               8.0(Yellow)~9.6(Blue)

Mass absorptivity,L/(cm.g):≥71.0
Solubility in ethanol: Pass
Ignition residue,%:≤0.3



Grade                               ACS
                                    (ACS reagent, 95 %)
Appearance                         brownish-green or reddish-brown crystalline powder
Infrared spectrometry       Conforms
Dye content,                    95%
Purity                              221-224 °C  
Wavelength 595 - 599 nm
Extinction Coefficient          ≥30000
Wavelength 378 - 382 nm
Extinction Coefficient          ≥8000
Wavelength 298 - 302 nm
Extinction Coefficient          ≥12000
  c = 0.01g/l, 0.1N NaOH
visual transition interval:
  acid range:                          pH 1.2 (red) to pH 2.8 (yellow)
  alkaline range:                      pH 8.0 (yellow) to pH 9.2 (blue)