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114472 Sigma-Aldrich

Cresol red

indicator grade, Dye content 95 %

Synonym: o-Cresolsulfonphthalein

  • CAS Number 1733-12-6

  • Empirical Formula (Hill Notation) C21H18O5S

  • Molecular Weight 382.43

  •  Beilstein Registry Number 343399

  •  EC Number 217-064-2

  •  MDL number MFCD00005878

  •  PubChem Substance ID 24847173

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Properties

Related Categories Analytical Reagents, Analytical/Chromatography, C, Cell Biology, Hematology and Histology,
grade   indicator grade
InChI Key   OBRMNDMBJQTZHV-UHFFFAOYSA-N
composition   Dye content, 95%
useful pH range   1.8 - 2.0, orange to yellow (acid)
  7.0 - 8.8, yellow to violet (alkaline)
pH range   7.2 - 8.8, yellow to red
absorption   λmax 367 nm (2nd)
  λmax 570 nm

Description

Packaging

5, 25 g in glass bottle

Application

Cresol Red is used as a tracking dye in DNA, RNA (agarose) and protein (polyacrylamide) electrophoresis. In agarose, Cresol Red runs with an apparent molecular size of approx. 125 bp DNA. Cresol Red does not inhibit Taq polymerase. Recently Cresol Red has been used as a pH sensitive indicator dye in nanoengineered optical urea biosensors films and hetero-core structured fiber optic pH sensor.

Safety & Documentation

Safety Information

Personal Protective Equipment 
RIDADR 
NONH for all modes of transport
WGK Germany 
3

Documents

Certificate of Analysis

Certificate of Origin


Milli-Q® Water Purification Solutions

Biomedical Applications
Protocols & Articles
Peer-Reviewed Papers
15

References

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