Methyl Red
| Price | $1 |
| Package | 1KG |
| Min. Order: | 1G |
| Supply Ability: | 100KG |
| Update Time: | 2019-07-06 |
Product Details
| Product Name: Methyl Red | CAS No.: 493-52-7 |
| EC-No.: 207-776-1 | Min. Order: 1G |
| Purity: 99% | Supply Ability: 100KG |
| Release date: 2019/07/06 |
AD68
| Methyl Red Basic information |
| Description |
| Product Name: | Methyl Red |
| Synonyms: | CI NO 13020;BROMOCRESOL GREEN-METHYL RED;BROMOCRESOL GREEN-METHYL RED ETHANOL;BROMOCRESOL GREEN/METHYL RED, MIXED INDICATOR;BROMOCRESOL GREEN/METHYL RED, MIX INDICATOR FOR ALKALINITY;METHYL RED;METHYL RED INDICATOR;METHYL RED MIXED SOLUTION |
| CAS: | 493-52-7 |
| MF: | C15H15N3O2 |
| MW: | 269.3 |
| EINECS: | 207-776-1 |
| Product Categories: | Organics;Analytical Chemistry;Indicator (pH);pH Indicators;Biochemical Reagents for Identification;Identification Tests&Reagents;Microbiology;BTitration;Indicator Solutions;Indicators;Stains and Dyes;Stains&Dyes, A to;Titration;Azo |
| Mol File: | 493-52-7.mol |
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| Methyl Red Chemical Properties |
| Melting point | 178-182°C |
| density | 0.839 g/mL at 25 °C |
| Fp | 11 °C |
| storage temp. | −20°C |
| solubility | ethanol: soluble1mg/mL |
| form | Solid |
| pka | 4.95(at 25℃) |
| Colour Index | 13020 |
| color | Reddish-violet |
| PH Range | 4.4(red)-6.3(yellow) |
| Water Solubility | Practically insoluble in water. Soluble in alcohol, acetic acidSoluble in ethanol. Insoluble in water. |
| λmax | 410nm, 530nm, 427nm, 519nm |
| Merck | 14,6119 |
| BRN | 750102 |
| Stability: | Stable. Incompatible with strong oxidizing agents. |
| Major Application | Waveguides, LED sensors, photoresists, liquid crystals, sol-gel matrix, optical sensors, paints, toys, detection of thiols, food freshness sensors, dental product, saliva sampling method, detecting lactic acid, carbohydrates |
| NIST Chemistry Reference | Benzoic acid, 2-[[4-(dimethylamino)phenyl]azo]-(493-52-7) |
| EPA Substance Registry System | Benzoic acid, 2-[[4-(dimethylamino)phenyl] azo]-(493-52-7) |
| Safety Information |
| Hazard Codes | Xn,T,F,Xi,C,N |
| Risk Statements | 10-20/21/22-68/20/21/22-68-36/38-23/25-11-36/37/38-34-51/53-39/23/24/25-23/24/25 |
| Safety Statements | 36/37-24/25-22-45-33-24-16-7-36-26-36/37/39-61 |
| RIDADR | UN 1170 3/PG 2 |
| WGK Germany | 1 |
| RTECS | DG8960000 |
| TSCA | Yes |
| HazardClass | 3 |
| PackingGroup | II |
| HS Code | 29270000 |
| Hazardous Substances Data | 493-52-7(Hazardous Substances Data) |
| Methyl Red Usage And Synthesis |
| Description | Methyl red is a commonly used indicator for acid-base titrations. This chemical is usually yellow but turns red below pH 4.0. Bacteria exhibiting mixed acids fermentation will accumulate acids in the medium, resulting in a color change. Approximately five drops of methyl red reagent are added to an overnight culture grown in MRVP broth to determine the test result. Different bacteria convert dextrose and glucose to pyruvate using different metabolic pathways. Some of these pathways produce unstable acidic products which quickly convert to neutral compounds. Some organisms use the butylene glycol pathway, which produces neutral end products, including acetoin and 2,3-butanediol. Other organisms use the mixed acid pathway, which produces acidic end products such as lactic, acetic, and formic acid. These acidic end products are stable and will remain acidic. The Methyl Red test involves adding the pH indicator methyl red to an inoculated tube of MR-VP broth. If the organism uses the mixed acid fermentation pathway and produces stable acidic end-products, the acids will overcome the buffers in the medium and produce an acidic environment in the medium. When methyl red is added, if acidic end products are present, the methyl red will stay red. |
| Chemical Properties | dark red crystalline powder |
| Uses | Used as pH indicator. |
| Uses | As indicator in 0.1% alcoholic solution; pH: 4.4 red, 6.2 yellow. Used for titrating NH3, weak organic bases, e.g., alkaloids; not suitable for organic acids, except oxalic and picric acid. Methyl red is easily reduced, thereby losing its color, and readings should be made promptly. It is gradually being replaced by sulfonphthalein indicators, such as bromcresol green, which are more stable and exhibit a sharper change in color. |
| Definition | ChEBI: An azo dye consisting of benzoic acid substituted at position 2 by a 4-[(dimethylamino)phenyl]diazenyl group. |
Company Profile Introduction
Established in 2014,Career Henan Chemical Co. is a manufacturerspecializing in the sale of fine chemicals.
Mainly deals in the sales of:
Pharmaceutical intermediates
OLED intermediates：
Pharmaceutical intermediates;
OLED intermediates;
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China- Since: 2014-12-17
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INQUIRY
楊俊青
sales@coreychem.com
sales@coreychem.com