Methyl Red
Methyl Red
- CAS:
- 493-52-7
- MF:
- C15H15N3O2
- MW:
- 269.3
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Company Type
Properties
- Melting point:
- 179-182 °C (lit.)
- Boiling point:
- 412.44°C (rough estimate)
- Density
- 0.839 g/mL at 25 °C
- vapor density
- 9.3 (vs air)
- refractive index
- 1.5930 (estimate)
- Flash point:
- 11 °C
- storage temp.
- Store at +5°C to +30°C.
- solubility
- ethanol: soluble1mg/mL
- Colour Index
- 13020
- form
- Solid
- pka
- 4.95(at 25℃)
- color
- Reddish-violet
- Odor
- Odorless
- 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
- InChIKey
- CEQFOVLGLXCDCX-MSUUIHNZSA-N
Safety Information
- Symbol(GHS)
GHS02,GHS07,GHS08
- Signal word
- Danger
- Hazard statements
- H225-H319-H371
- Precautionary statements
- P210-P260-P280-P308+P311-P337+P313-P403+P235
- Hazard Codes
- Xn,T,F,Xi,C,N
- 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
Use
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.
48 India supplier list of "Methyl Red"
![](/images/pro-3.jpg)
- Product Name:Methyl Red
- Products Intro:Purity: 99% | Package: 1 kg,5 kg, 10 kg,25kg and 1 MT
- Company Type: Trader
- Country/Region: Gujarat,INDIA
![](/images/pro-3.jpg)
- Product Name:Acid red 2
- Products Intro:Purity: 98% | Package: 1 kg,5 kg, 10 kg,25kg and 1 MT
- Company Type: Reagent
- Country/Region: Maharashtra,INDIA
![](/images/pro-3.jpg)
- Product Name:Methyl Red
- Products Intro:Purity: 95% | Package: 1 kg,5 kg, 10 kg,25kg and 1 MT
- Company Type: Reagent
- Country/Region: Maharashtra,INDIA
![](/images/pro-3.jpg)
- Product Name:METHYL RED FREE ACID
- Products Intro:Purity: 99% | Package: 1 kg,5 kg, 10 kg,25kg and 1 MT
- Company Type: Manufacturer
- Country/Region: Maharashtra,INDIA
![](/images/pro-3.jpg)
- Product Name:Acid red 2
- Products Intro:Purity: 98% | Package: 1 kg,5 kg, 10 kg,25kg and 1 MT
- Company Type: Reagent
- Country/Region: Maharashtra,INDIA
![](/images/pro-3.jpg)
- Product Name:Methyl Red
- Products Intro:Purity: 98% | Package: 1 kg,5 kg, 10 kg,25kg and 1 MT
- Company Type: Trader
- Country/Region: Pune,INDIA
![](/images/pro-3.jpg)
- Product Name:BromocresolGreen/MethylRed,mixedindicatorsolution
- Products Intro:Brand:sigma aldrich | Product Number:318728 | Purity:inmethanol
- Company Type: Trader
- Country/Region: Bangalore,INDIA