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205478

Sigma-Aldrich

Bromoxylenol Blue

indicator grade, Dye content 95 %

Synonym(s):

3′,3″-Dibromo-p-xylenolsulfonphthalein

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About This Item

Empirical Formula (Hill Notation):
C23H20Br2O5S
CAS Number:
40070-59-5
Molecular Weight:
568.27
Beilstein:
369060
EC Number:
254-780-4
MDL number:
MFCD00005873
UNSPSC Code:
12171500
PubChem Substance ID:
24852334
NACRES:
NA.47

grade

indicator grade

Quality Level

200

form

powder or crystals

composition

Dye content, 95%

technique(s)

titration: suitable

pH

6.0-7.6, yellow to blue

mp

218 °C (dec.) (lit.)

solubility

ethanol: 1 mg/mL, clear

λmax

417 nm

ε (extinction coefficient)

≥16000 at 417-421 nm in methanol at 0.016 g/L

application(s)

diagnostic assay manufacturing
hematology
histology

storage temp.

room temp

SMILES string

Cc1cc(c(C)c(Br)c1O)C2(OS(=O)(=O)c3ccccc23)c4cc(C)c(O)c(Br)c4C

InChI

1S/C23H20Br2O5S/c1-11-9-16(13(3)19(24)21(11)26)23(17-10-12(2)22(27)20(25)14(17)4)15-7-5-6-8-18(15)31(28,29)30-23/h5-10,26-27H,1-4H3

InChI key

MRDOFVRMTNWMDA-UHFFFAOYSA-N

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General description

Bromoxylenol blue (BXB) belongs to the sulfonphthalein family. It is also known as 3′,3′′-dibromo-p-xylenol sulfonphthalein.

Application

Bromoxylenol blue is a pH indicator (for pH ranges 6.0-7.6) that is routinely used in acid-base titrations. It is also used for the photometric determination of carboxylic acid impurities in organic liquids and polymers.

Recent applications of bromoxylenol blue include:
  • Building pH sensors
  • Developing optical sensors for high acidity measurements
  • Synthesizing antifungal activity compounds
  • Determination of drugs
  • In fiber-optic biosensors for the determination and detection of pesticides.

Storage Class Code

11 - Combustible Solids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Regulatory Listings

Regulatory Listings are mainly provided for chemical products. Only limited information can be provided here for non-chemical products. No entry means none of the components are listed. It is the user’s obligation to ensure the safe and legal use of the product.

JAN Code

205478-BULK:
205478-VAR:
205478-10G:
205478-1G:

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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