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68250 Sigma-Aldrich

Methyl Orange

for microscopy (Hist.), indicator (pH 3.0-4.4)

Synonym: 4-[4-(Dimethylamino)phenylazo]benzenesulfonic acid sodium salt, Acid Orange 52, Helianthin, Orange III

  • CAS Number 547-58-0

  • Empirical Formula (Hill Notation) C14H14N3NaO3S

  • Molecular Weight 327.33

  •  Beilstein Registry Number 4732884

  •  Colour Index Number 13025

  •  EC Number 208-925-3

  •  MDL number MFCD00007502

  •  PubChem Substance ID 329760496

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Properties

Related Categories Analytical Reagents, Analytical/Chromatography, Indicators, Microscopy Reagents, Redox Indicators,
grade   for microscopy (Hist.)
  indicator (pH 3.0-4.4)
InChI Key   STZCRXQWRGQSJD-GEEYTBSJSA-M
pH range   3.0 - 4.4, pink to yellow
absorption   501.4 nm in H2O (acidified)

Price and Availability


Laboratory Gloves
Safety & Documentation

Safety Information

Symbol 
GHS06  GHS06
Signal word 
Danger
Hazard statements 
Precautionary statements 
RIDADR 
UN 3143PSN1 6.1 / PGIII
WGK Germany 
3
RTECS 
DB6327000
Protocols & Articles
Peer-Reviewed Papers
15

References

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