Methyl Orange
- CAS No.
- 547-58-0
- Chemical Name:
- Methyl Orange
- Synonyms
- MO;HELIANTHIN;Methyl Orange solution;sodiuM (E)-4-((4-(diMethylaMino)phenyl)diazenyl)benzenesulfonate;orang;orange3;CI 13025;S NO 176;oranziii;BETZ 0211
- CBNumber:
- CB2264381
- Molecular Formula:
- C14H14N3NaO3S
- Molecular Weight:
- 327.33
- MDL Number:
- MFCD00007502
- MOL File:
- 547-58-0.mol
| Melting point | 300 °C |
|---|---|
| Density | 0.987 g/mL at 25 °C |
| 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) |
SAFETY
Risk and Safety Statements
| Symbol(GHS) |  GHS06 |
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Signal word | Danger | |||||||||
| Hazard statements | H301 | |||||||||
| Precautionary statements | P264-P270-P301+P310-P405-P501 | |||||||||
| 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 |
|
Methyl Orange price More Price(33)
| Manufacturer | Product number | Product description | CAS number | Packaging | Price | Updated | Buy |
|---|---|---|---|---|---|---|---|
| Sigma-Aldrich | 68250 | Methyl Orange for microscopy (Hist.), indicator (pH 3.0-4.4) | 547-58-0 | 25g | $27 | 2024-03-01 | Buy |
| Sigma-Aldrich | 68250 | Methyl Orange for microscopy (Hist.), indicator (pH 3.0-4.4) | 547-58-0 | 100g | $45 | 2024-03-01 | Buy |
| Sigma-Aldrich | 68250 | Methyl Orange for microscopy (Hist.), indicator (pH 3.0-4.4) | 547-58-0 | 500g | $157 | 2024-03-01 | Buy |
| Sigma-Aldrich | 114510 | Methyl Orange ACS reagent, Dye content 85% | 547-58-0 | 25g | $54 | 2024-03-01 | Buy |
| Sigma-Aldrich | 114510 | Methyl Orange ACS reagent, Dye content 85% | 547-58-0 | 100g | $76.1 | 2024-03-01 | Buy |
Methyl Orange Chemical Properties,Uses,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.
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 | |||
| Fading | Stain | 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.]
Methyl Orange Preparation Products And Raw materials
| Supplier | Tel | Country | ProdList | Advantage | |
|---|---|---|---|---|---|
| Shenyang Simchoice Chemical Co.,Ltd | +86-024-23769576 +86-15040101888 | sales@simchoicechem.com | China | 254 | 58 |
| Hebei Weibang Biotechnology Co., Ltd | +8615531157085 | abby@weibangbio.com | China | 8806 | 58 |
| Hebei Chuanghai Biotechnology Co,.LTD | +86-13131129325 | sales1@chuanghaibio.com | China | 5889 | 58 |
| Henan Fengda Chemical Co., Ltd | +86-371-86557731 +86-13613820652 | info@fdachem.com | China | 20282 | 58 |
| Hebei Zhuanglai Chemical Trading Co.,Ltd | +8613343047651 | admin@zlchemi.com | China | 3002 | 58 |
| Shanghai Daken Advanced Materials Co.,Ltd | +86-371-66670886 | info@dakenam.com | China | 18750 | 58 |
| Henan Tianfu Chemical Co.,Ltd. | +86-0371-55170693 +86-19937530512 | info@tianfuchem.com | China | 21634 | 55 |
| career henan chemical co | +86-0371-86658258 +8613203830695 | sales@coreychem.com | China | 29880 | 58 |
| Hubei Jusheng Technology Co.,Ltd. | 18871490254 | linda@hubeijusheng.com | CHINA | 28172 | 58 |
| Shandong chuangyingchemical Co., Ltd. | 18853181302 | sale@chuangyingchem.com | CHINA | 5906 | 58 |
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View Lastest Price from Methyl Orange manufacturers
| Image | Update time | Product | Price | Min. Order | Purity | Supply Ability | Manufacturer | |
|---|---|---|---|---|---|---|---|---|
 |
2025-01-03 | Methyl Orange
547-58-0
|
US $10.00 / kg | 1kg | 99% | 20ton | Hebei Zhuanglai Chemical Trading Co.,Ltd | |
 |
2024-11-19 | Methyl Orange
547-58-0
|
US $25.00 / ASSAYS | 100ASSAYS | 99.5% | 100 mt | Hebei Weibang Biotechnology Co., Ltd | |
 |
2024-10-24 | Methyl Orange
547-58-0
|
US $0.00 / mg | 10g | TargetMol Chemicals Inc. |
-
- Methyl Orange
547-58-0
- US $10.00 / kg
- 99%
- Hebei Zhuanglai Chemical Trading Co.,Ltd
-
- Methyl Orange
547-58-0
- US $25.00 / ASSAYS
- 99.5%
- Hebei Weibang Biotechnology Co., Ltd
-
- Methyl Orange
547-58-0
- US $0.00 / mg
- TargetMol Chemicals Inc.