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Acid Red 362(CAS 61814-58-2)

Acid Red 362

Name:C.I.Acid Red 362

Molecular Structure: Single azo,1:2 Metal Complexes


C.I.Acid Red 362,CAS 61814-58-2,430.80,C16H12ClN4NaO5S,Acid Red M-BR,Acid Red M-R,Neutral red M-BR,Neutral red Complex SBR,Neutral Brilliant red S-BR,Neutral Brilliant red S-BRL

Molecular Formula:C16H12ClN4NaO5S

Molecular Weight: 430.80

CAS Registry Number:61814-58-2

Manufacturing Methods : 3-Amino-5-chloro-2-hydroxybenzenesulfonic acid diazo, and 3-Methyl-1-phenyl-1H-pyrazol-5(4H)-one coupling, and then turn it into 1:2 chromium complex.

Properties and Applications: Brilliant red. Red powder, soluble in water, ethanol, xylene, DMF organic solvents. Used for wool, silk, PVA and their blended fabric dyeing and printing.


Light Fastness


Persperation Fastness

Oxygen bleaching

Fastness to seawater
















Acid Red 362, also known as C.I. Acid Red 362, is a prominent dye classified under the group of single azo and 1:2 metal complexes. This dye possesses unique molecular properties that make it particularly useful in various applications within the textile industry. Understanding its chemical composition, manufacturing process, properties, and applications is crucial for comprehending its significance in the world of dyes.

Chemical Identity

  • Name: C.I. Acid Red 362
  • CAS Registry Number: 61814-58-2
  • Molecular Structure: Single azo, 1:2 Metal Complexes
  • Molecular Formula: C16H12ClN4NaO5S
  • Molecular Weight: 430.80
  • Alternative Names: Acid Red M-BR, Acid Red M-R, Neutral Red M-BR, Neutral Red Complex SBR, Neutral Brilliant Red S-BR, Neutral Brilliant Red S-BRL

Synthesis: Manufacturing Methods

Acid Red 362 is synthesized through a well-defined manufacturing process involving several chemical reactions. The key steps in its synthesis are as follows:

  1. 3-Amino-5-chloro-2-hydroxybenzenesulfonic Acid Diazo Formation: This initial step involves the creation of the diazo compound, a crucial precursor in the synthesis of azo dyes. Here, 3-amino-5-chloro-2-hydroxybenzenesulfonic acid is used to form the diazo compound.
  2. Coupling with 3-Methyl-1-phenyl-1H-pyrazol-5(4H)-one: The diazo compound is then coupled with 3-Methyl-1-phenyl-1H-pyrazol-5(4H)-one, initiating the formation of the desired dye intermediate.
  3. Conversion to Chromium Complex: In the final step, the intermediate dye compound is complexed with chromium in a 1:2 ratio, forming the Acid Red 362 dye.

Properties and Characteristics

Acid Red 362 exhibits specific properties that contribute to its effectiveness and versatility in dyeing applications.

  • Color and Form: The dye appears as a brilliant red powder, and it is soluble in various solvents such as water, ethanol, xylene, and DMF (dimethylformamide).
  • Applications: Acid Red 362 finds primary applications in dyeing and printing wool, silk, polyvinyl alcohol (PVA), and their blends, making it a versatile choice within the textile industry.

Applications in the Textile Industry

Acid Red 362 is widely utilized for its exceptional properties that make it suitable for various dyeing applications in the textile industry.

  • Wool Dyeing: Acid Red 362 is extensively used for dyeing wool and wool-blend fabrics, providing vibrant and lasting red hues.
  • Silk Dyeing: Due to its solubility in organic solvents like ethanol and DMF, Acid Red 362 is favored for dyeing silk fabrics.
  • PVA Dyeing: Polyvinyl alcohol (PVA) fabrics also benefit from the dyeing capabilities of Acid Red 362, resulting in attractive red shades.

Standards and Fastness

The standardization of Acid Red 362 involves assessing its fastness to various elements, indicating its suitability and durability in practical applications.

  • Light Fastness: ISO standards rate Acid Red 362 with a commendable light fastness of 5, ensuring its resistance to fading when exposed to light.
  • Color Retention (Soaping): The dye exhibits excellent color retention, achieving a rating of 5 in ISO standards for soaping fastness, demonstrating resistance to color fading during washing.
  • Perspiration Fastness: Acid Red 362 maintains its vibrant color even under perspiration, earning a high rating of 5 in ISO standards.
  • Bleaching and Seawater Fastness: The dye performs well in oxygen bleaching and seawater exposure, with ratings of 4-5 in ISO standards, indicating its durability in these conditions.


Acid Red 362, a member of the azo dye family, stands out as a versatile and reliable dye within the textile industry. Its brilliant red hue, excellent solubility, and robust fastness properties make it a preferred choice for dyeing various fabrics, including wool, silk, and PVA. Understanding its molecular structure, manufacturing process, properties, and applications is fundamental for utilizing this dye effectively and ensuring its continued significance in the world of dyes and textile coloration.




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