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Methyl Orange

Description References

Methyl Orange

CAS No.547-58-0
Chemical Name:Methyl Orange
CBNumber:CB2264381
Molecular Formula:C14H14N3NaO3S
Formula Weight:327.33
MOL File:547-58-0.mol

Methyl Orange Property

Melting point 300 °C
Density 0.987 g/mL at 25 °C
bulk density 200-400kg/m3
Flash point 37 °C
storage temp. Store at +5°C to +30°C.
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)
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
Stability Stable. Incompatible with strong oxidizing agents.
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
Indirect Additives used in Food Contact Substances METHYL ORANGE
FDA 21 CFR 175.390
FDA UNII 6B4TC34456
EPA Substance Registry System Methyl orange (547-58-0)
UNSPSC Code 12352107
NACRES NA.47

Safety

Hazard Codes :T
Risk Statements :25-10
Safety Statements :45-24/25-16-36/37/39
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

NFPA 704:

	0
0		0

Hazard and Precautionary Statements (GHS)

Symbol(GHS)
Signal wordDanger
Hazard statements H301
Precautionary statements P264-P270-P301+P310-P405-P501

Methyl Orange Price More Price(21)

Brand: Sigma-Aldrich(India)
Product number: 68250
Product name : Methyl Orange
Purity: for microscopy (Hist.), indicator (pH 3.0-4.4)
Packaging: 25G
Price: ₹2468.1
Updated: 2022/06/14
Buy: Buy

Brand: Sigma-Aldrich(India)
Product number: 68250
Product name : Methyl Orange
Purity: for microscopy (Hist.), indicator (pH 3.0-4.4)
Packaging: 100G
Price: ₹3528.95
Updated: 2022/06/14
Buy: Buy

Brand: Sigma-Aldrich(India)
Product number: 68250
Product name : Methyl Orange
Purity: for microscopy (Hist.), indicator (pH 3.0-4.4)
Packaging: 500G
Price: ₹13823.53
Updated: 2022/06/14
Buy: Buy

Brand: Sigma-Aldrich(India)
Product number: 114510
Product name : Methyl Orange
Purity: ACS reagent, Dye content 85?%
Packaging: 100G
Price: ₹4903.73
Updated: 2022/06/14
Buy: Buy

Brand: Sigma-Aldrich(India)
Product number: 114510
Product name : Methyl Orange
Purity: ACS reagent, Dye content 85?%
Packaging: 25G
Price: ₹6116.13
Updated: 2022/06/14
Buy: Buy

Methyl Orange Chemical Properties,Usage,Production

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.
References [1] https://en.wikipedia.org/wiki/Methyl_orange
[2] Mohammed Bassim Alqaragully (2014) International Journal of Advanced Research in Chemical Science, 1, 48-59
Chemical Properties Orange-yellow powder. Soluble in hotwater; insoluble in alcohol.
Uses Methyl orange is a pH indicator frequently used in titrations, also used for histological microscopy.
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.
Preparation 4-Aminobenzenesulfonic acid diazo, and N,N-dimethylaniline coupling.
Definition An acid–base indicator that is red in solutions below a pH of 3 and yellow above a pH of 4.4. As the transition range is clearly on the acid side, methyl orange is suitable for the titration of an acid with a moderately weak base, such as sodium carbonate.
Definition methyl orange: An organic dyeused as an acid–base indicator. Itchanges from red below pH 3.1 toyellow above pH 4.4 (at 25°C) and isused for titrations involving weakbases.
General Description Orange powder.
Air & Water Reactions Azo dyes can be explosive when suspended in air at specific concentrations. Insoluble in water.
Reactivity Profile Methyl Orange is an azo compound. Azo, diazo, azido compounds can detonate. This applies in particular to organic azides that have been sensitized by the addition of metal salts or strong acids. Toxic gases are formed by mixing materials of this class with acids, aldehydes, amides, carbamates, cyanides, inorganic fluorides, halogenated organics, isocyanates, ketones, metals, nitrides, peroxides, phenols, epoxides, acyl halides, and strong oxidizing or reducing agents. Flammable gases are formed by mixing materials in this group with alkali metals. Explosive combination can occur with strong oxidizing agents, metal salts, peroxides, and sulfides.
Biological Activity Methyl Orange is an azo dye which works as a pH indicator.

Properties and Applications orange. The strong sulfuric acid for green light yellow, diluted into red orange. The dye solution to join strong hydrochloric acid for orange red; Add thick sodium hydroxide solution for green light yellow.

Standard	Light Fastness	Soaping		Persperation Fastness	Oxygen bleaching		Fastness to seawater
Standard	Light Fastness	Fading	Stain	Persperation Fastness	Fading	Stain	Fading	Stain
ISO
AATCC

Purification Methods Recrystallise it twice from hot water, then wash it with a little EtOH followed by diethyl ether. It is an indicator: pH 3.1 (red) and pH 4.4 (yellow). [Beilstein 16 IV 510.]