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Catalog Number:
30111
CAS Number:
493-52-7
Methyl Red free acid
Grade:
ACS reagent
Synonym(s):
2-[4-(Dimethylamino)phenylazo]benzoic acid, CI Acid Red 2
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$27.24 /25G
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Product Information

Methyl Red free acid is a versatile azo dye widely utilized in various applications, particularly in the fields of pH indicator solutions and biological staining. This compound exhibits a distinct color change from red to yellow as the pH transitions from acidic to neutral, making it an essential tool for researchers and professionals in laboratories. Its ability to provide clear visual cues in titrations and other chemical analyses enhances its utility in educational settings and industrial processes alike.

In addition to its role as a pH indicator, Methyl Red free acid is also employed in microbiology for staining purposes, allowing for the differentiation of bacterial species. Its unique properties enable it to serve as a reliable marker in various biochemical assays, contributing to advancements in research and diagnostics. With its broad applicability and effectiveness, Methyl Red free acid remains a valuable resource for professionals seeking precision and clarity in their work.

Synonyms
2-[4-(Dimethylamino)phenylazo]benzoic acid, CI Acid Red 2
CAS Number
493-52-7
Grade
ACS reagent
Molecular Formula
C15H15N3O2
Molecular Weight
269.3
MDL Number
MFCD00002425
PubChem ID
10303
Melting Point
179-182 °C
Appearance
Red to marron crystalline powder
Conditions
Store at RT
General Information
Synonyms
2-[4-(Dimethylamino)phenylazo]benzoic acid, CI Acid Red 2
CAS Number
493-52-7
Grade
ACS reagent
Molecular Formula
C15H15N3O2
Molecular Weight
269.3
MDL Number
MFCD00002425
PubChem ID
10303
Melting Point
179-182 °C
Appearance
Red to marron crystalline powder
Conditions
Store at RT
Properties
Additional property information coming soon!
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Safety and Regulations
Hazmat
No
Antibiotic
No
DEA-regulated
No
Warnings
-
Applications

Methyl Red free acid is widely utilized in research focused on:

  • pH Indicator: Commonly used in titrations, it changes color at a pH range of 4.4 to 6.2, making it ideal for determining the acidity of solutions in laboratories.
  • Biological Research: Employed in microbiological studies to differentiate between acid-producing and non-acid-producing bacteria, aiding in the identification of various microbial species.
  • Textile Industry: Used as a dye in textiles, providing vibrant colors while being relatively easy to apply and fix, enhancing the aesthetic appeal of fabrics.
  • Pharmaceutical Applications: Acts as a pH-sensitive dye in drug formulation, helping to ensure that medications maintain their stability and efficacy under varying pH conditions.
  • Environmental Testing: Utilized in assessing water quality, where it helps indicate the acidity of water samples, contributing to environmental monitoring efforts.

Citations