Description

Sodium 4-[(1,5-Dihydroxy-2-Naphthyl)Azo]Naphthalene-1-Sulphonate is a synthetic azo dye intermediate known for its specific chromophoric structure. This compound matters for its role in producing high-value, color-fast dyes and pigments used in demanding industrial applications. It is primarily needed by manufacturers in the textile, ink, and specialty chemical industries seeking precise colorants and functional intermediates. Our supply ensures consistent quality and purity for reliable integration into complex synthesis processes.

Application

• Key intermediate for the synthesis of azo dyes and pigments, particularly for textile coloring.
• Used in the production of specialty inks, including those for security printing and high-performance markers.
• Acts as a functional chromophore in the development of advanced materials for optical applications.
• Potential use as a staining agent or indicator in selected analytical and laboratory chemistry contexts.
• Employed in research and development for novel colorant molecules with enhanced properties.

Basic Information

Product Name	Sodium 4-[(1,5-Dihydroxy-2-Naphthyl)Azo]Naphthalene-1-Sulphonate
CAS No.	94160-43-7
Molecular Formula	C₂₀H₁₃N₂NaO₆S
Molecular Weight	432.38 g/mol
Synonyms	1-Naphthalenesulfonic acid, 4-[(1,5-dihydroxy-2-naphthalenyl)azo]-, sodium salt; C.I. 18050; Sodium 4-[(1,5-dihydroxy-2-naphthyl)azo]-1-naphthalenesulfonate; Acid Dye Intermediate; Azo Dye Intermediate NA; 4-[(1,5-Dihydroxy-2-naphthyl)azo]naphthalene-1-sulfonic acid sodium salt
EINECS	Contact for details

Quality Control

Our products undergo rigorous quality testing to ensure compliance with industry standards. Every batch is controlled against strict specifications for identity, purity, and impurity profiles to guarantee batch-to-batch consistency for your synthesis. Certificates of Analysis (COA) are available upon request, providing full transparency on key parameters such as assay and related substances.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	Dark red to brown powder or crystalline solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Heavy Metals	≤ 20 ppm
Related Substances (HPLC)	Individual impurity ≤ 1.0%; Total impurities ≤ 3.0%

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