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Safety Information

205486

Sigma-Aldrich

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
Beilstein:
363132
EC Number:
204-736-5
MDL number:
MFCD00005870
UNSPSC Code:
12171500
PubChem Substance ID:
24852335
NACRES:
NA.47

grade

indicator grade

Quality Level

200

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

SMILES string

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

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

InChI key

MGUKYHHAGPFJMC-UHFFFAOYSA-N

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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 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

205486-VAR:
205486-1G:
205486-5G:
205486-BULK:

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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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