Description

Methyl Red Hydrochloride is the hydrochloride salt form of Methyl Red, a well-characterized azo dye and pH indicator. This compound is essential for precise analytical chemistry and biological research, offering enhanced stability and solubility for standardized applications. It is primarily utilized by professionals in analytical laboratories, microbiology, and industrial quality control sectors for titration, microbial culture media preparation, and as a critical reagent in various diagnostic kits.

Application

• pH Indicator in Titration: Used in acid-base titrations within the pH transition range of 4.4 (red) to 6.2 (yellow).
• Microbiological Media: A key component in diagnostic culture media, such as Methyl Red-Voges Proskauer (MR-VP) broth, for identifying enteric bacteria.
• Analytical Reagent: Employed as a staining agent and colorimetric endpoint indicator in various chemical analyses and test kits.
• Research & Development: Serves as a model compound in studies of azo dye chemistry, photochemistry, and analytical method development.
• Educational Laboratories: Used in university and training labs to demonstrate principles of pH measurement and microbiological testing.
• Industrial Process Control: Applied in monitoring pH changes in specific manufacturing or fermentation processes.

Basic Information

Product Name	Methyl Red Hydrochloride
CAS No.	63451-28-5
Molecular Formula	C15H16ClN3O2
Molecular Weight	305.76 g/mol
Synonyms	Acid Red 2 Hydrochloride; 2-[4-(Dimethylamino)phenylazo]benzoic Acid Hydrochloride; C.I. 13020 Hydrochloride; Methyl Red Salt; MR-HCl; p-Dimethylaminoazobenzene-o-carboxylic Acid Hydrochloride; Benzoic Acid, 2-[4-(dimethylamino)phenyl]azo]-, hydrochloride (1:1)
EINECS	Contact for details

Quality Control

Our Methyl Red Hydrochloride is manufactured under strict quality protocols to ensure batch-to-batch consistency and reliability for critical applications. Each lot is tested to meet high-purity standards suitable for analytical and microbiological use. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and performance characteristics is provided with every shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at a controlled room temperature (15-25°C). This product is hygroscopic (moisture-sensitive); ensure the container is sealed after each use to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	Dark red to violet crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
pH Transition Range	4.4 - 6.2
Loss on Drying	≤ 2.0 %
Residue on Ignition	≤ 0.5 %
Solubility	Soluble in water, ethanol

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.