4-(Dimethylamino)benzaldehyde (DMAB)

4-(Dimethylamino)benzaldehyde (DMAB)

$35.00
Weight

4-(Dimethylamino)benzaldehyde (DMAB) — Reagent Grade

Chromogenic Reagent for Indole Detection & Analytical Chemistry

Catalogue Number: ASC-1069
CAS Number: 100-10-7
Molecular Formula: C₉H₁₁NO
Molar Mass: 149.19 g/mol

Overview

4-(Dimethylamino)benzaldehyde (DMAB) is a high-purity aromatic aldehyde widely used as a chromogenic reagent in biochemical assays, analytical chemistry, and organic synthesis. It is best known as the key component of Ehrlich’s reagent, which is routinely employed for the qualitative detection of indoles, including tryptophan, tryptamine, and related compounds.

DMAB reacts with indole-containing molecules under acidic conditions to form intensely coloured complexes, allowing rapid and sensitive visual or spectrophotometric detection. Due to its reliability and well-established chemistry, DMAB is extensively used in microbiology, biochemistry, pharmaceutical research, and quality-control laboratories.

Ausamics DMAB is supplied as reagent grade material with controlled purity to ensure consistent performance and reproducible analytical results.

Key Features & Benefits

  • High-purity reagent grade material (≥98.5 %)

  • Essential component of Ehrlich’s reagent

  • Produces distinct colour reactions with indoles

  • Suitable for biochemical, analytical, and synthetic applications

  • Reliable batch-to-batch performance

Typical Applications

Biochemical & Microbiological Assays

  • Preparation of Ehrlich’s reagent for indole detection

  • Identification of indole-positive microorganisms

  • Qualitative detection of tryptophan and related compounds

Analytical & Diagnostic Chemistry

  • Urease activity assays and biochemical diagnostics

  • Chromogenic detection reactions in laboratory analysis

Organic & Pharmaceutical Chemistry

  • Intermediate in pharmaceutical and fine chemical synthesis

  • Reagent in aldehyde-based derivatisation reactions

Research & Quality Control

  • Analytical research and method development

  • Quality-control testing in regulated laboratories

Principle of the Reagent

Under acidic conditions, DMAB condenses with indole functional groups to form a coloured Schiff-base-type complex. The resulting colour intensity correlates with the presence of indole compounds, enabling rapid qualitative or semi-quantitative detection in biochemical and microbiological assays.

Physical & Chemical Properties

  • Appearance: Light yellow to beige crystalline powder

  • Purity: ≥ 98.5 % (Reagent Grade)

  • Solubility: Soluble in organic solvents; limited solubility in water

  • Light sensitivity: Sensitive; store protected from light

Storage & Stability

  • Store in a tightly sealed container

  • Keep in a cool, dry, and well-ventilated place

  • Protect from light and moisture

  • Stable under recommended storage conditions

Intended Use

For laboratory and research use only.
Not for human or animal consumption.
Not for food, feed, or pharmaceutical administration.

Quality & Documentation

  • Supplied with Certificate of Analysis (CoA)

  • SDS / MSDS available upon request

  • Manufactured and handled under controlled conditions

Customs & Trade Information

HS / AHECC Code: 2912.29.00
Aldehydes (other than acyclic aldehydes without oxygen function)

Why Buy DMAB from Ausamics?

Ausamics is an Australian life-science supplier specialising in analytical reagents and microbiological chemicals, offering:

  • Reliable local supply

  • Consistent reagent quality

  • Competitive pricing

  • Responsive technical and commercial support

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