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Merck
CN

236047

Tetrabromophenol Blue sodium salt

Dye content 85 %, ≥84.5% (HPLC)

Synonym(s):

sodium 2,3,4,5-tetrabromo-6-[(3,5-dibromo-4-hydroxy-phenyl)-(3,5-dibromo-4-oxo-cyclohexa-2,5-dien-1-ylidene)methyl]benzenesulfonate, 3,3′,3′′,4,5,5′,5′′,6-Octabromophenolsulfonphthalein sodium salt

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About This Item

Empirical Formula (Hill Notation):
C19H5Br8NaO5S
CAS Number:
108321-10-4
Molecular Weight:
1007.53
NACRES:
NA.47
PubChem Substance ID:
24854133
UNSPSC Code:
12171500
MDL number:
MFCD00064343

Key Documents

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Product Name

Tetrabromophenol Blue sodium salt, Dye content 85 %, ≥84.5% (HPLC)

InChI

1S/C19H6Br8O5S.Na/c20-7-1-5(2-8(21)17(7)28)11(6-3-9(22)18(29)10(23)4-6)12-13(24)14(25)15(26)16(27)19(12)33(30,31)32;/h1-4,28H,(H,30,31,32);/q;+1/p-1

SMILES string

[Na+].Oc1c(Br)cc(cc1Br)C(=C2\C=C(Br)C(=O)C(Br)=C2)\c3c(Br)c(Br)c(Br)c(Br)c3S([O-])(=O)=O

InChI key

GFMOPDHPAXHAQX-UHFFFAOYSA-M

assay

≥84.5% (HPLC)

form

powder

composition

Dye content, 85%

technique(s)

titration: suitable

color

brown to dark brown

λmax

610 nm

ε (extinction coefficient)

≥12000 at 298-304 nm in H2O at 0.005 g/L
≥55000 at 607-613 nm in H2O at 0.005 g/L
≥59000 at 222-228 nm in H2O at 0.005 g/L

application(s)

diagnostic assay manufacturing
hematology
histology

storage temp.

room temp

Quality Level

200

Related Categories

Biochem/physiol Actions

Tetrabromophenol Blue sodium salt has two tautomeric forms that are differently coloured: blue at pH > 4.6 and yellow at pH < 3, and is thus employed as a pH indicator.

General description

Tetrabromophenol blue is an acid-sensitive triphenylmethane dye widely employed as an industrial dye for food, drugs, cosmetics, and laboratory indicators. It belongs to the group of sulfonephthalein acid-base indicators. It is commercially available as a sodium salt.

pictograms

Exclamation mark
GHS07

signalword

Warning

Hazard Classifications

Eye Irrit. 2 - Skin Irrit. 2 - STOT SE 3

target_organs

Respiratory system

Storage Class

11 - Combustible Solids

wgk

WGK 3

flash_point_f

Not applicable

flash_point_c

Not applicable

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Certificates of Analysis (COA)

Lot/Batch Number
SHBS6062
SHBP8440
SHBN5008
MKCJ8482
MKCC3113

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G H Lin et al.
Journal of applied toxicology : JAT, 12(4), 267-274 (1992-08-01)
Bromophenol blue and tetrabromophenol blue are two triphenylmethane dyes. Triphenylmethane derivatives and their structurally related compounds, such as fluoresceins and xathenes, are widely used as industrial dyes for foods, drugs, cosmetics, textiles, printing inks or laboratory indicators. Since a number
Radiation sensitive indicator based on tetrabromophenol blue dyed poly(vinyl alcohol)
W.B. Beshir
Radiation Physics and Chemistry, 86, 129-135 (2013)

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