205486

Sigma-Aldrich

Xylenol Blue

indicator grade, Dye content 90 %

Synonym(s):
p-Xylenolsulfonephthalein, p-Xylenol Blue
Empirical Formula (Hill Notation):
C23H22O5S
CAS Number:
Molecular Weight:
410.48
Beilstein/REAXYS Number:
363132
EC Number:
MDL number:
PubChem Substance ID:
NACRES:
NA.47

Quality Level

grade

indicator grade

form

powder

composition

Dye content, 90%

application(s)

hematology: suitable
histology: suitable
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

Featured Industry

Diagnostic Assay Manufacturing

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.

Packaging

1, 5 g in glass bottle

Personal Protective Equipment

dust mask type N95 (US),Eyeshields,Gloves

RIDADR

NONH for all modes of transport

WGK Germany

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificate of Analysis

Certificate of Origin

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

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