Description

Sodium 4-Hydroxy-3-[[3-(Phenylsulphamoyl)-p-Tolyl]Azo]Naphthalenesulphonate is a specialized azo dye intermediate known for its distinct chromophoric properties. This compound is critical for manufacturers requiring precise color development and consistent batch-to-batch performance in demanding applications. It is primarily utilized by producers in the textile dyeing, ink formulation, and specialty chemical synthesis industries.

Application

• Key intermediate in the synthesis of acid dyes and direct dyes for textile fibers such as wool, silk, and nylon.
• Precursor for manufacturing pigments and colorants used in inks, including printing and writing inks.
• Used in the production of specialty dyes for leather and paper products.
• Research and development chemical for novel chromogenic materials and sensors.
• Potential use as a staining agent in biological and histological applications.
• Intermediate in the fine chemical industry for custom synthesis projects.

Basic Information

Product Name	Sodium 4-Hydroxy-3-[[3-(Phenylsulphamoyl)-p-Tolyl]Azo]Naphthalenesulphonate
CAS No.	3058-98-8
Molecular Formula	C23H16N3NaO6S2
Molecular Weight	517.50 g/mol
Synonyms	Acid Red 1 (C.I. 18050); Naphthalenesulfonic acid, 4-hydroxy-3-((3-((phenylamino)sulfonyl)-4-methylphenyl)azo)-, monosodium salt; Sodium 4-hydroxy-3-((3-((phenylamino)sulfonyl)-p-tolyl)azo)-1-naphthalenesulfonate; 3-((3-((Phenylamino)sulfonyl)-p-tolyl)azo)-4-hydroxy-1-naphthalenesulfonic acid sodium salt; 1-Naphthalenesulfonic acid, 4-hydroxy-3-((3-((phenylamino)sulfonyl)-4-methylphenyl)azo)-, sodium salt; C.I. Acid Red 1; Wool Fast Red A; Amacid Red E
EINECS	221-296-4

Quality Control

Our production of Sodium 4-Hydroxy-3-[[3-(Phenylsulphamoyl)-p-Tolyl]Azo]Naphthalenesulphonate adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation via FT-IR and UV-Vis spectroscopy, to ensure it meets precise customer specifications. A Certificate of Analysis (COA) detailing all test results is provided with each shipment to guarantee traceability and compliance.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area 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. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	Reddish-brown to dark brown powder
Identification (IR)	Conforms to reference spectrum
Identification (UV-Vis)	Conforms
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Sulfated Ash	≤ 20.0%
Heavy Metals (as Pb)	≤ 20 ppm
Water Solubility	Freely soluble

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