Products

Chemical Products for Diverse Industrial Applications



Home > Products > Dyestuffs And Pigments > Methyl Red

Methyl Red

Name: Methyl Red
SKU: 0

Basic Information

CAS No.: 493-52-7
Molecular Formula: C15H15N3O2
Molecular Weight: 269.3

Can't Find The Product You Need?

Tell Us Your Product Requirements, Specifications And Target Industry, Our Professional Team Will Reply You Within 24 Hours.

Send Us A Message

Product Details

Methyl Red is usually a lustrous purple crystal or reddish-brown powder. It is almost insoluble in water but soluble in ethanol, chloroform and acetic acid. It is mainly used in acid-base titration to indicate the pH value of the solution and determine the titration endpoint through color changes.

Chemical Properties

Property	Value
Melting point	179-182 °C (lit.)
Boiling point	412.44°C (rough estimate)
Density	0.839 g/mL at 25 °C
Bulk density	300-500kg/m3
Vapor density	9.3 (vs air)
Refractive index	1.5930 (estimate)
Fp	11 °C
storage temp.	Store at +5°C to +30°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)
Odor	Odorless
Water Solubility	Practically insoluble in water. Soluble in alcohol, acetic acidSoluble in ethanol. Insoluble in water.
λmax	410nm, 530nm, 427nm, 519nm
ε(extinction coefficient)	≥10000 at 282-288nm in methanol≥20000 at 509-519nm in methanol≥7000 at 329-335nm in methanol
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
CAS DataBase Reference	493-52-7
NIST Chemistry Reference	Benzoic acid, 2-[[4-(dimethylamino)phenyl]azo]-(493-52-7)
IARC	3 (Vol. 8, Sup 7) 1987
EPA Substance Registry System	Methyl red (493-52-7)

Safety Information

Property	Value
Hazard symbols	Xn, T, F, Xi, C, N
Hazard class codes	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 descriptions	36/ 37-24/ 25-22-45-33-24-16-7-36-26-36/ 37/ 39-61
UN dangerous goods number	UN 1170 3/PG 2
WGK Germany	1
RTECS number	DG8960000
TSCA	TSCA listed
Hazard class	3
Packing group	II
HS code	29270000
Storage class	11 - Combustible solids
Hazardous substances data	493-52-7 (Hazardous Substances Data)

Product Usage

Methyl Red is a classic azo-type acid-base indicator extensively used in chemical analysis and laboratory testing. In acid-base titration, it provides a sensitive color transition between pH 4.4 (red) and pH 6.2 (yellow), making it a standard reagent for volumetric analysis. In the field of microbiology, it is the essential component of the Methyl Red (MR) test within the "IMViC" battery of tests, used to differentiate enteric bacteria based on their ability to produce stable acid end products from glucose fermentation. Additionally, it is widely applied in water quality testing and acidity monitoring for various industrial formulations.

Factory Showcase

Shipping And Transportation

FAQ

Q1: What information should I include in my inquiry?

A1: Please provide the product name, purity or grade, required quantity, packaging, application, destination, and any documentation requirements. More complete information helps us prepare an accurate quotation.

Q2: Can I request a sample?
A2: Samples may be available for selected products. Please provide the required grade, sample quantity, application, and delivery details so we can confirm availability and shipping arrangements.

Q3: What product documents can you provide?
A3: Depending on the product, available documents may include a COA, SDS, TDS, specifications, and packing information. Please confirm your documentation requirements before ordering.

Q4: Can you provide customized specifications or packaging?
A4: Customization may be available for selected products, including product specifications, packaging sizes, and labeling. Feasibility and minimum order requirements are evaluated individually.

Q5: How long does delivery take?

A5: Delivery time depends on product availability, order quantity, shipping method, destination, and customs procedures. An estimated schedule will be Q6: provided after the order requirements are confirmed.

Q6: Can you arrange the shipment of regulated chemicals?

A6: For eligible products and destinations, we can help coordinate appropriate packaging, shipping documents, and logistics arrangements. Requirements depend on the product classification, carrier rules, and destination regulations.

Related Recommendations

fei@jnbychemicals.com



Methyl Red

Navigation