Description

4-Hydroxy-3-[[2-Methoxy-5-Methyl-4-[[2-(Sulphooxy)Ethyl]Sulphonyl]Phenyl]Azo]Naphthalene-2,7-Disulphonic Acid is a high-purity, water-soluble anionic dye intermediate characterized by its complex azo-naphthalene structure. This compound is essential for synthesizing vibrant and stable dyes, offering excellent color fastness and compatibility with various substrates. It is primarily sought after by manufacturers in the textile, ink, and specialty chemical industries for producing high-performance colorants.

Application

• Textile Dyeing: A key intermediate for synthesizing reactive and acid dyes used on cotton, wool, silk, and nylon fibers.
• Ink Manufacturing: Used in the production of high-quality inks for digital, packaging, and security printing applications.
• Leather Coloring: Employed in the formulation of dyes for achieving deep, uniform colors on leather goods.
• Paper Coloring: Suitable for the coloration of specialty papers and paper products requiring specific hue and brightness.
• Biological Staining: Potential use as a precursor or component in histological stains for laboratory and diagnostic applications.
• Research & Development: Serves as a valuable chemical building block in organic synthesis and material science research.

Basic Information

Product Name	4-Hydroxy-3-[[2-Methoxy-5-Methyl-4-[[2-(Sulphooxy)Ethyl]Sulphonyl]Phenyl]Azo]Naphthalene-2,7-Disulphonic Acid
CAS No.	29476-87-7
Molecular Formula	C₂₀H₁₉N₂O₁₃S₃
Molecular Weight	615.56 g/mol
Synonyms	Acid Red 337; C.I. 17200; 2,7-Naphthalenedisulfonic acid, 4-hydroxy-3-((2-methoxy-5-methyl-4-((2-sulfooxy)ethyl)sulfonyl)phenyl)azo)-; Reactive Red 195 intermediate; Azo dye intermediate 29476-87-7; 4-Hydroxy-3-((2-methoxy-5-methyl-4-((2-sulfonatooxy)ethyl)sulfonyl)phenyl)azo)naphthalene-2,7-disulfonate
EINECS	Contact for details

Quality Control

Our production of 4-Hydroxy-3-[[2-Methoxy-5-Methyl-4-[[2-(Sulphooxy)Ethyl]Sulphonyl]Phenyl]Azo]Naphthalene-2,7-Disulphonic Acid adheres to stringent quality management protocols to ensure batch-to-batch consistency and purity. All materials undergo rigorous analytical testing, including HPLC for assay and impurity profiling. Certificates of Analysis (COA) detailing purity, identity, and specific test results are provided with every shipment to guarantee compliance with your technical requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). This product is hygroscopic (moisture-sensitive) and light-sensitive; therefore, containers must be kept sealed when not in use to minimize exposure to atmospheric moisture and light, which can affect stability.

Specification

Item	Specification
Appearance	Dark red to brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Water Content	≤ 5.0%
pH (1% Solution)	6.0 - 8.0
Heavy Metals (as Pb)	≤ 20 ppm

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