Methyl Red 493-52-7

Methyl infrared appears as glossy purple crystals or reddish brown powder. Melting point 180-182 ℃. Easy to dissolve in ethanol and glacial acetic acid, almost insoluble in water. Methyl red is one of the commonly used acid-base indicators, with a concentration of 0.1% ethanol solution and a pH of 4.4 (red) -6.2 (yellow). Also used for staining live protozoa.

Availability:



Inquire

Model:
493-52-7
Brand:
futurechemical
Code:
493-52-7

Product Description

Methyl Red Basic information
Description
Product Name:	Methyl Red
CAS:	493-52-7
MF:	C15H15N3O2
MW:	269.3
EINECS:	207-776-1
Mol File:	493-52-7.mol
Methyl Red Chemical Properties
Melting point	179-182 °C (lit.)
Boiling point	412.44°C (rough estimate)
bulk density	300-500kg/m3
density	0.839 g/mL at 25 °C
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
pka	4.95(at 25℃)
form	Solid
Colour Index	13020
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.
ε(extinction coefficient)	≥10000 at 282-288nm in methanol
	≥20000 at 509-519nm in methanol
	≥7000 at 329-335nm in methanol
λmax	410nm, 530nm, 427nm, 519nm
Merck	146,119
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
IARC	3 (Vol. 8, Sup 7) 1987
NIST Chemistry Reference	Benzoic acid, 2-[[4-(dimethylamino)phenyl]azo]-(493-52-7)
EPA Substance Registry System	Methyl red (493-52-7)

Methyl Red C15H15N3O2 493-52-7 Acid-base indicator Biological stain Redox indicator

Quality Assurance

Full-Process Quality Control: From incoming raw material inspection to in-process monitoring and final outgoing checks, every batch is inspected at each production stage against strict acceptance standards.
Third-Party Certified & Tested: Our quality management system is certified to ISO 9001, and products are regularly tested by accredited laboratories (e.g. SGS, TÜV). Test reports are available on request.
100% Batch Traceability: Each batch carries a unique lot number that links raw material records, production parameters, and test results, enabling complete traceability from factory to final delivery.
Pre-Shipment Inspection: Every order passes a final pre-shipment inspection, with inspection photos and reports shared before dispatch.

Send the water analysis, the system type and the operating conditions. Our sales team replies with the product selection, dosing recommendation and commercial details.

Request a Quote