Description

4-Hydroxy-7-p-Toluidino-2-Naphthalenesulfonic Acid is a specialized organic intermediate belonging to the naphthalenesulfonic acid derivative family. This compound is valued for its role as a key precursor in the synthesis of dyes, pigments, and functional colorants. It is primarily sought after by manufacturers in the chemical synthesis, dye and pigment production, and research and development sectors for creating high-performance materials.

Application

• Dye and Pigment Intermediate: A crucial building block for synthesizing azo dyes, acid dyes, and other complex colorants.
• Functional Dye Synthesis: Used in the production of dyes for textiles, leather, paper, and ink applications.
• Chemical Research & Development: Serves as a valuable intermediate in organic synthesis for developing new chemical entities.
• Analytical Reagent: Potential use as a reagent or standard in analytical chemistry and quality control laboratories.
• Specialty Chemical Production: Employed in the manufacture of other specialty fine chemicals and photochemicals.

Basic Information

Product Name	4-Hydroxy-7-p-Toluidino-2-Naphthalenesulfonic Acid
CAS No.	6259-57-0
Molecular Formula	C₁₇H₁₅NO₄S
Molecular Weight	329.37 g/mol
Synonyms	7-(p-Toluidino)-4-hydroxy-2-naphthalenesulfonic Acid; 4-Hydroxy-7-(4-methylanilino)-2-naphthalenesulfonic Acid; C.I. 37515; Acid Black 107; Naphthalenesulfonic acid, 4-hydroxy-7-[(4-methylphenyl)amino]-; 7-(4-Methylanilino)-4-hydroxy-2-naphthalenesulfonic Acid; 4-Hydroxy-7-(p-tolylamino)-2-naphthalenesulfonic Acid
EINECS	228-418-6

Quality Control

Our production of 4-Hydroxy-7-p-Toluidino-2-Naphthalenesulfonic Acid adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing, including HPLC for purity, IR for identification, and loss on drying to ensure it meets precise 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). This product is hygroscopic (moisture-sensitive); the container must be kept tightly sealed to prevent absorption of atmospheric moisture, which can affect product quality.

Specification

Item	Specification
Appearance	Off-white to light brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 2.0%
Residue on Ignition	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm

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