Methyl Orange

Base Information

• Chemical Name: Methyl Orange
• CAS No.: 547-58-0
• Molecular Formula: C14H14N3NaO3S
• Molecular Weight: 327.339
• Hs Code.: 29270000
• Mol file: 547-58-0.mol

Synonyms:Benzenesulfonicacid, 4-[[4-(dimethylamino)phenyl]azo]-, sodium salt (9CI);Benzenesulfonicacid, p-[[p-(dimethylamino)phenyl]azo]-, sodium salt (8CI);Orange III (6CI);4-Dimethylaminoazobenzene-4'-sulfonic acid sodium salt;Acid Orange 52;AlbionMethyl Orange;C.I. 13025;C.I. Acid Orange 52;Diazoben;Eniamethyl Orange;Gold orange;Helianthine;Helianthine B;KCA Methyl Orange;Methyl Orange B;Orange 3;Sodium 4-(dimethylamino)azobenzene-4'-sulfonate;Sodium 4-[4-(dimethylamino)phenylazo]benzenesulfonate;Sodium4'-(dimethylamino)azobenzene-4-sulfonate;Sodium p-[[p-(dimethylamino)phenyl]azo]benzenesulfonate;Sodium p-dimethylaminoazobenzenesulfonate;Tropaeolin D;

Chemical Property of Methyl Orange

Chemical Property:

• Appearance/Colour: orange-yellow powder
• Melting Point: 300 °C
• Boiling Point: 100oC
• PKA: 3.4(at 25℃)
• Flash Point: 37 °C
• PSA: 93.54000
• Density: 0.987 g/mL at 25 °C
• LogP: 4.15290
• Storage Temp.: Store at RT.
• Solubility.: 5g/l
• Water Solubility.: Soluble in ethanol. Partially soluble in hot water. Slightly soluble in cold water and pyrimidine. Insoluble in ether and alcoho

Purity/Quality:

99.9% ^*data from raw suppliers

Methyl orange ACS ^*data from reagent suppliers

Safty Information:

• Pictogram(s): T
• Hazard Codes: T
• Statements: 25-10
• Safety Statements: 45-24/25-16-36/37/39

MSDS Files:

SDS file from LookChem

Total 1 MSDS from other Authors

Useful:

• Description: Methyl orange is an orange, azoic dye. It has a transition range from 3.1 to 4.4. Methyl orange does not have a full spectrum of color change, but has a sharper end point. Methyl orange shows red color in acidic medium (pH < 3.1) and yellow color in basic medium (pH > 4.4). It is used as a pH-indicator in 0.1% aqueous solution for the titration of mineral acids (not organic acids) and strong bases. Methyl orange is also used in dyeing and printing textiles as a dyestuff.
• Uses: As indicator in 0.1% aqueous solution. pH: 3.1 red, 4.4 yellow. Employed for titrating most mineral acids, strong bases, estimating alkalinity of waters; useless for organic acids. In dyeing and printing of textiles. Methyl orange is a pH indicator frequently used in titrations, also used for histological microscopy.

Technology Process of Methyl Orange

There total 13 articles about Methyl Orange which guide to synthetic route it. The literature collected by LookChem mainly comes from the sharing of users and the free literature resources found by Internet computing technology. We keep the original model of the professional version of literature to make it easier and faster for users to retrieve and use. At the same time, we analyze and calculate the most feasible synthesis route with the highest yield for your reference as below:

synthetic route:

Reference yield: 95.01%

N,N-dimethyl-aniline (121-69-7,77733-26-7) + 4-aminobenzene sulfonic acid (121-57-3,856062-06-1) → methyl orange (547-58-0)

Guidance literature:

N,N-dimethyl-aniline; With hydrogenchloride; In water; N,N-dimethyl-formamide; at 25 ℃;

With sodium nitrite; In water; N,N-dimethyl-formamide;

4-aminobenzene sulfonic acid; In water; N,N-dimethyl-formamide; at 25 ℃; for 0.00333333h;

Reference yield:

α-cyclodextrin-Methyl Orange complex (64887-49-6) → methyl orange (547-58-0) + alpha cyclodextrin (10016-20-3)

Guidance literature:

In water; at 25 ℃; Equilibrium constant;

DOI:10.1021/jo00032a036

Reference yield:

sodium sulfanilate (515-74-2) + 4-amino-N,N-dimethylaniline (99-98-9) → methyl orange (547-58-0)

Guidance literature:

With oxygen; 1.5% Au/TiO2; In toluene; at 100 ℃; for 40h; under 2250.23 - 3750.38 Torr;

upstream raw materials:

diazomethane

diethyl ether

4'-aminoazobenzene-4-sulfonic acid

4-sulfobenzenediazonium

Downstream raw materials:

N-methyl-2,4-dinitroaniline

4-aminobenzene sulfonic acid

C₄₈H₈₀O₄₀*C₁₄H₁₄N₃O₃S^(1-)*Na⁽¹⁺⁾

α-cyclodextrin-Methyl Orange complex

Refernces

Green synthesis of gold, silver, platinum, and palladium nanoparticles reduced and stabilized by sodium rhodizonate and their catalytic reduction of 4-nitrophenol and methyl orange

10.1039/c8nj01223g

The research focuses on the green synthesis of gold (Au), silver (Ag), platinum (Pt), and palladium (Pd) nanoparticles using sodium rhodizonate as a bifunctional reducing and stabilizing agent. The study involves the preparation of these nanoparticles in water through a single-step process and evaluates their catalytic efficiency in reducing 4-nitrophenol (4-NP) to 4-aminophenol (4-AP) using sodium borohydride (NaBH4) and in the dual-catalytic oxidation of formic acid followed by the reduction of methyl orange (MO). The synthesized nanoparticles were characterized using UV-Vis spectroscopy, transmission electron microscopy (TEM), energy-dispersive X-ray (EDX) spectroscopy, and zeta potential measurements to determine their size, morphology, crystallinity, elemental composition, and surface charge. The catalytic activities of the nanoparticles were assessed through UV-Vis spectrophotometer monitoring of the absorbance changes at specific wavelengths, corresponding to the reactants and products in the reduction reactions.

Adsorption and UV/Visible photocatalytic performance of BiOI for methyl orange, Rhodamine B and methylene blue: Ag and Ti-loading effects

10.1039/c3ce42654h

The study examines the adsorption and photocatalytic performance of bismuth oxyiodide (BiOI) for the degradation of three dyes: methyl orange (MO), Rhodamine B (RhB), and methylene blue (MB). The adsorption performance of BiOI was found to vary depending on the dye, with the order of adsorption efficiency being MO < RhB < MB. This trend was attributed to the electrostatic interactions between the positively charged RhB and MB dyes and the negatively charged BiOI surface, while MO, being negatively charged, interacted less favorably. Under UV and visible light irradiation, the photocatalytic degradation of MO followed the order BiOI < Ag–BiOI < Ti–BiOI, indicating that Ti-doping enhanced the photocatalytic activity. For RhB, BiOI alone was more effective under UV light, but Ag and Ti-doped BiOI showed better performance under visible light, suggesting a dye-sensitized mechanism where the dye absorbs light and transfers energy to the catalyst. Methylene blue (MB), despite being efficiently adsorbed, showed poor photocatalytic degradation under both UV and visible light, indicating that its removal was primarily through adsorption rather than photocatalysis. The study also identified superoxide radicals (?O2 -) and holes (h+) as the active species responsible for dye degradation under visible light, with no significant contribution from hydroxyl radicals (?OH). These findings highlight the complex interplay between adsorption and photocatalytic mechanisms in BiOI and its doped variants for dye degradation.