Description

4-Hydroxy-3-[[4-[[2-(Phosphonooxy)Ethyl]Sulphonyl]Phenyl]Azo]Naphthalene-2,7-Disulphonic Acid, Sodium Salt is a high-purity, water-soluble azo dye intermediate of significant commercial importance. Its complex molecular structure, featuring a phosphonooxyethylsulphonyl group, makes it a critical precursor for synthesizing specialized reactive dyes and colorants. This compound is primarily sought by manufacturers in the textile, ink, and specialty chemical industries for developing vibrant, wash-fast colors with enhanced fiber affinity.

Application

• Reactive Dye Synthesis: A key intermediate for producing high-performance reactive dyes used in cotton, wool, and nylon dyeing.
• Textile Colorants: Used in the manufacture of dyes that form covalent bonds with textile fibers, ensuring excellent color fastness to washing and light.
• Inkjet Ink Formulation: Serves as a functional component in the production of advanced pigment and dye-based inks for digital printing.
• Specialty Chemical Intermediate: Employed in organic synthesis for creating complex molecules with specific chromophoric and functional properties.
• Research & Development: Utilized in academic and industrial R&D labs for studying azo dye chemistry and developing novel colorant applications.

Basic Information

Product Name	4-Hydroxy-3-[[4-[[2-(Phosphonooxy)Ethyl]Sulphonyl]Phenyl]Azo]Naphthalene-2,7-Disulphonic Acid, Sodium Salt
CAS No.	94109-39-4
Molecular Formula	C18H14N2Na3O14PS3 (or related sodium salt form)
Molecular Weight	Approx. 702.4 g/mol (Contact for exact weight of specific hydrate form)
Synonyms	Reactive Red 238 (related dye class); 4-Hydroxy-3-((4-((2-(phosphonooxy)ethyl)sulfonyl)phenyl)azo)naphthalene-2,7-disulfonic acid trisodium salt; C.I. Reactive Red 238 intermediate; Azo dye intermediate 94109-39-4; Phosphonooxyethylsulfonyl phenyl azo naphthalene disulfonate; Trisodium 4-hydroxy-3-[[4-[[2-(phosphonooxy)ethyl]sulfonyl]phenyl]azo]naphthalene-2,7-disulfonate
EINECS	Contact for details

Quality Control

Our production of 4-Hydroxy-3-[[4-[[2-(Phosphonooxy)Ethyl]Sulphonyl]Phenyl]Azo]Naphthalene-2,7-Disulphonic Acid, Sodium Salt adheres to stringent quality protocols to ensure batch-to-batch consistency and purity for industrial applications. The material is characterized using advanced analytical techniques including HPLC, NMR, and mass spectrometry. Certificates of Analysis (COA) detailing purity, identity, and impurity profiles are provided with each shipment to support your quality assurance and regulatory compliance needs.

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). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after opening to prevent absorption of atmospheric moisture, which can affect product performance and stability.

Specification

Item	Specification
Appearance	Dark red to brown powder or crystalline solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0% (Area %)
Water Content (KF)	≤ 5.0 %
Heavy Metals (as Pb)	≤ 20 ppm
Solubility (in Water)	Clear, complete solution

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