Contact us: +91 9550333722 040 - 40102781
Structured search
India
Choose your country
Different countries will display different contents
China United Kingdom South Korea Germany Japan India
Inquriy
Try our best to find the right business for you.
My chemicalbook

Welcome back!

HomecompanyMethyl Red
Methyl Red
Methyl Red
Methyl Red

Methyl Red

Price USD1.00
Packge 1KG
  • Min. Order:1G
  • Supply Ability:100KG
  • Time:2019-07-06

Product Details

  • Product NameMethyl Red
  • CAS No.493-52-7
  • EINECS No.207-776-1
  • MFC15H15N3O2
  • MW269.3
  • InChIKeyCEQFOVLGLXCDCX-UHFFFAOYSA-N
  • AppearanceSolidReddish-violet
  • density 0.839 g/mL at 25 °C
  • storage temp. Store at +5°C to +30°C.
  • Melting point 179-182 °C (lit.)
  • Water Solubility Practically insoluble in water. Soluble in alcohol, acetic acidSoluble in ethanol. Insoluble in water.
  • Boiling point 412.44°C (rough estimate)

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
Methyl Red Structure
 
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

Henan CoreyChem Co., Ltd, based on the original Zhengzhou Cote Chemical Research Institute, be brave in absorbing highly educated talents & overseas returnees; actively responded to Zhengzhou City High-tech Zone Government’s Special Care Policy, reorganized and founded in National University of Science and Technology Park, which is a high-tech, stock enterprise of high-end chemical Custom synthesis;The park was created by the People's Government of Henan Province, and proved by Ministry of Education and the National Science & Technology, taking the construction mode of "many college a park, and common development", mainly depends on Zhengzhou University and Henan University’s scientific research and talent advantage to set up Universities, scientific research institute and enterprise scientific research achievements transformation platform, to make high-tech enterprises incubate,  is the new high-tech talent gathering base, high and new technology industry enterprise radiation base, colleges and universities technological innovation base.
 
Henan Coreychem Co., Ltd, facing global High-tech pharmaceutical raw materials, high complex new type intermediates, fine chemicals custom synthesis, scale-up production and Rare chemicals trade. Corey have well-equipped machine, strong technical force and considerate marketing team service. We also have rich experience advantage in basic research, small scale process development, scale-up, industrial technology development & production and cost control.
 

Recommended supplier

career henan chemical co

Henan China
  • Since:2014-12-17
  • Address: No.967,15th Floor,Unit 7, Building 1, No.70 of DianChang Road, High-tech Development Zone, Zhengzho
INQUIRY
HomePage About Us Contact us Terms Privacy Chemicalbook
Land Line: 040 - 40102781 Mobile contact: +91 9550333722