Methyl Red TCI M0421

Chemical Identity

CAS No.: 493-52-7
PubChem: CID 10303·SID 87572480
Formula: C15H15N3O2
Molecular weight: 269.30 g/mol
Purity: >98.0%(HPLC)
Reference databases: ChEBI·ChemSpider·ECHA·Wikipedia

Full identifiers (IUPAC, SMILES, InChIKey)

IUPAC: 2-[[4-(dimethylamino)phenyl]diazenyl]benzoic acid
SMILES: CN(C)C1=CC=C(C=C1)N=NC2=CC=CC=C2C(=O)O
InChIKey: CEQFOVLGLXCDCX-UHFFFAOYSA-N

Rp 477.750,00

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Methyl Red is a chemical compound widely used as an acid dye in various laboratory experiments. It plays a crucial role in analytical chemistry, particularly in pH indicators and acid-base reactions. This dye is commonly employed in research settings to detect and measure changes in the acidity or alkalinity of solutions. Its ability to change color based on the surrounding pH makes it an essential tool for qualitative and quantitative analysis in chemical testing. Methyl Red is especially valuable in experiments that require visual confirmation of pH shifts, such as titrations and colorimetric assays.

One of the key properties that make Methyl Red a preferred choice is its chemical stability under controlled conditions. It is water-soluble and maintains its structural integrity during storage and use, ensuring consistent performance. Additionally, it is non-toxic under normal conditions, which enhances its safety profile in laboratory environments. These characteristics make it a reliable and practical option for both educational and industrial applications. Its ease of handling and predictable behavior further contribute to its popularity among researchers and students alike.

In Indonesian laboratories, Methyl Red is extensively used in educational institutions and research facilities. It is a standard component of chemical laboratories, particularly those involved in organic chemistry and analytical testing. Its presence is essential for experiments that require pH detection, color change indicators, and acid-base reaction analysis. As a fundamental reagent, Methyl Red supports a wide range of scientific investigations and is integral to the day-to-day operations of chemical laboratories in Indonesia.

TCI brochures (PDF)

Titration Reagents and TLC Stains 2026-05-07 · p. 3

Related TCI products

Acid-Base Titration: Methyl Red is ideal for determining the endpoint of acid-base reactions due to its distinct color change in response to pH variations.
pH Indication in Solutions: Its ability to change color based on pH levels makes it a reliable indicator for monitoring solution acidity or alkalinity.
Organic Compound Identification: Methyl Red is used in the identification of organic compounds through colorimetric reactions that depend on pH changes.
Educational Demonstrations: It is commonly used in teaching labs to illustrate pH changes and acid-base reactions in a visual and interactive manner.
Colorimetric Analysis: Methyl Red serves as a valuable tool in colorimetric assays, where color changes are used to quantify specific chemical components.

Brand	TCI
CAS number	493-52-7
Molecular formula	—
Purity	—
Category	Chemistry > Stains and Dyes (for Research and Experimental Use) > Acid Dyes (for Research and Experimental Use)
Pack sizes	Available in standard laboratory quantities as per supplier specifications
Physical form	Solid powder or crystalline form, depending on packaging
Storage	—

Methyl Red should be stored in a cool, dry place away from direct sunlight and moisture to maintain its chemical integrity. It is recommended to use airtight containers to prevent exposure to humidity, which could affect its solubility and color stability. Since it is non-toxic under normal conditions, it does not require special handling beyond standard laboratory safety protocols. However, it is advisable to keep it in a secure location to prevent accidental spills or contamination. Proper labeling of containers is essential to ensure safe and accurate use in laboratory settings.

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