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:

C₄₈H₈₀O₄₀*C₁₄H₁₄N₃O₃S^(1-)*Na⁽¹⁺⁾

α-cyclodextrin-Methyl Orange complex

tetryl

carbon dioxide

Refernces

• 1、 -. "PROCESS FOR THE SYNTHESIS OF ARYLDIAZONIUM SALTS USING NITROGEN OXIDES IN OXYGEN-CONTAINING GAS STREAMS, ESPECIALLY FROM INDUSTRIAL WASTE GASES". Page/Page column 43. . Retrieved 2017/06/30.
• 2、 -. "PREPARATION OF AZO COMPOUNDS WITH SOLID CATALYSTS". Page/Page column 7. . Retrieved 2011/06/23.