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Merck
CN

205486

Xylenol Blue

indicator grade, Dye content 90 %

Synonym(s):

p-Xylenol Blue, p-Xylenolsulfonephthalein

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About This Item

Empirical Formula (Hill Notation):
C23H22O5S
CAS Number:
125-31-5
Molecular Weight:
410.48
UNSPSC Code:
12171500
NACRES:
NA.47
PubChem Substance ID:
24852335
EC Number:
204-736-5
Beilstein/REAXYS Number:
363132
MDL number:
MFCD00005870

Key Documents

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Product Name

Xylenol Blue, indicator grade, Dye content 90 %

InChI key

MGUKYHHAGPFJMC-UHFFFAOYSA-N

InChI

1S/C23H22O5S/c1-13-11-20(24)15(3)9-18(13)23(19-10-16(4)21(25)12-14(19)2)17-7-5-6-8-22(17)29(26,27)28-23/h5-12,24-25H,1-4H3

SMILES string

Cc1cc(c(C)cc1O)C2(OS(=O)(=O)c3ccccc23)c4cc(C)c(O)cc4C

grade

indicator grade

form

powder

composition

Dye content, 90%

technique(s)

titration: suitable

useful pH range

1.2-2.8, red to yellow(acid)
8.0-9.8, yellow to violet(alkaline)

mp

212 °C (dec.) (lit.)

λmax

424 nm

application(s)

diagnostic assay manufacturing
hematology
histology

storage temp.

room temp

Quality Level

200

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General description

Xylenol Blue is a dark brown powder and it belongs to the class of sulfonephthalein dyes. Xylenol Blue changes color from red (pH 1.2) to yellow (2.8) and yellow (8.0) to blue (9.6). It is widely used in food storage, drugs, determining bacterial growth, microbial assays and determining lipase.

Storage Class

11 - Combustible Solids

wgk

WGK 3

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

dust mask type N95 (US), Eyeshields, Gloves

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Certificates of Analysis (COA)

Lot/Batch Number
BCCC8696
MKCJ0504
MKCJ0503
MKCJ0502
BCBZ4156

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R. W. Sabnis
Handbook of Acid-Base Indicators (2007)

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