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547-58-0

Name Methyl Orange
CAS 547-58-0
EINECS(EC#) 208-925-3
Molecular Formula C14H14N3NaO3S
MDL Number MFCD00007502
Molecular Weight 327.33
MOL File 547-58-0.mol

Chemical Properties

Appearance orange-yellow powder
Melting point  300 °C
density  0.987 g/mL at 25 °C
Fp  37 °C
storage temp.  Store at RT.
solubility  5g/l
Colour Index  13025
form  Powder/Solid
pka 3.4(at 25℃)
color  Yellow-Orange
Specific Gravity 0.987
Odor Odorless
PH 6.5 (5g/l, H2O, 20℃)
PH Range 3.1(Red)-4.4(Orange)
Stability: Stable. Incompatible with strong oxidizing agents.
Water Solubility  Soluble in ethanol. Partially soluble in hot water. Slightly soluble in cold water and pyrimidine. Insoluble in ether and alcohol.
λmax 507nm, 522nm, 464nm
Merck  14,6105
BRN  4732884
Biological Applications Detecting microorganisms; treating dermatological diseases,vaginal affections; dental materials; wound dressing materials
Major Application Liquid crystals, thin films, sensors, sol-gel matrix, waveguides, host-guest chemistry, display device, corrosion inhibitor, glass coatings, paints, wound dressing materials, pharmaceuticals, dental materials, measuring nucleic acid
CAS DataBase Reference 547-58-0
EPA Substance Registry System Benzenesulfonic acid, 4-[[4-(dimethylamino)phenyl] azo]-, sodium salt(547-58-0)

Safety Data

Hazard Codes  T
Risk Statements 
Safety Statements 
RIDADR  UN 3143 6.1/PG 3
WGK Germany  3
RTECS  DB6327000
TSCA  Yes
HazardClass  6.1
PackingGroup  III
HS Code  29270000
Hazardous Substances Data 547-58-0(Hazardous Substances Data)
Toxicity
LD50 orally in Rabbit: 60 mg/kg

Hazard Information

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