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72210 Sigma-Aldrich

Neutral Red

for microscopy (Bact., Bot., Fl., Hist., Vit.), indicator (pH 6.8-8.0)

Synonym: 3-Amino-7-dimethylamino-2-methylphenazine hydrochloride, Basic Red 5, Toluylene red

  • CAS Number 553-24-2

  • Empirical Formula (Hill Notation) C15H17ClN4

  • Molecular Weight 288.78

  •  Colour Index Number 50040

  •  Beilstein/REAXYS Number 3918740

  •  EC Number 209-035-8

  •  MDL number MFCD00012651

  •  PubChem Substance ID 329763896

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Properties

Related Categories Analytical Reagents, Analytical/Chromatography, Indicators, Microscopy Reagents, Redox Indicators,
grade   for microscopy (Bact., Bot., Fl., Hist., Vit.)
  indicator (pH 6.8-8.0)
InChI Key   PGSADBUBUOPOJS-UHFFFAOYSA-N
pH range   6.8 - 8.0, red to yellow
mp   290 °C (dec.) (lit.)

Description

General description

Neutral red is a vital dye widely used as a cellular pH indicator and is selective for shifts in pH. It is highly lipophilic in nature. It favours membrane potential dependent fluorescence that attributes to changes in hydrophobicity.

Application

Neutral red has been used to stain mouse mammary glands.

Useful as an indicator for preparing neutral red paper, and as a biological stain.

Safety & Documentation

Safety Information

RIDADR 
NONH for all modes of transport
WGK Germany 
3
RTECS 
SG1400000

Documents

Certificate of Analysis

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Titrette from Brand
Protocols & Articles
Peer-Reviewed Papers
15

References

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