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Bromocresol Purple 115-40-2

Slightly yellow rose colored crystalline powder. Insoluble in water, yellow in ethanol, purple red in dilute sodium hydroxide and dilute sodium carbonate solutions, melting point 241-242 ℃. Application: Acid base indicator, color changes from light yellow to purple red, with a pH range of 5.2-6.8.
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  • 115-40-2

  • futurechemical

  • 115-40-2


Bromocresol Purple Basic information
Product Name: Bromocresol Purple
CAS: 115-40-2
MF: C21H16Br2O5S
MW: 540.22
EINECS: 204-087-8
Mol File: 115-40-2.mol
Bromocresol Purple Chemical Properties
Melting point  240 °C (dec.) (lit.)
bulk density 515kg/m3
density  1.6509 (estimate)
Fp  36 °C
storage temp.  Store at +5°C to +30°C.
solubility  ethanol: soluble1mg/mL
pka 6.21, 6.3, 6.4(at 25℃)
form  Solid
Boiling point  590.2±50.0 °C(Predicted)
color  Purplish-brown
PH pH : 5.2~6.8
PH Range 5.2(yellow)-6.8(purple)
Water Solubility  practically insoluble
ε(extinction coefficient) ≥22000 at 418-424nm in methanol
λmax 419nm, 433nm, 591nm
Merck  141,387
BRN  359618
Stability: Stable. Incompatible with strong oxidizing agents.
Major Application Waveguides, fuel cells, sensors, sol-gel technology, display device, falsification-proof security paper, paints, detergents, identifying fresh and stale rice, detecting lactic acid bacteria, dental materials, vaginal infection test method
InChIKey ABIUHPWEYMSGSR-UHFFFAOYSA-N
CAS DataBase Reference 115-40-2(CAS DataBase Reference)
EPA Substance Registry System Bromcresol Purple (115-40-2)

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