Description

8-p-Toluidinonaphthalene-1-Sulphonic Acid is a specialized organic sulfonic acid derivative, serving as a key intermediate in the synthesis of dyes, pigments, and fluorescent markers. Its value lies in its unique molecular structure, which provides the chromophore and functional group necessary for creating vivid and stable colorants. This compound is essential for manufacturers and R&D laboratories in the dye, textile, analytical chemistry, and specialty chemical sectors seeking high-purity intermediates for advanced synthesis.

Application

• Dye and Pigment Intermediate: A critical precursor in the synthesis of azo dyes, acid dyes, and other complex organic pigments.
• Fluorescent Probe Synthesis: Used in research to develop naphthalene-based fluorescent markers and sensors for biological and chemical detection.
• Analytical Reagent: Functions as a reagent or a standard in chromatographic analysis and other laboratory testing methods.
• Textile Industry: Employed in the production of dyes for coloring synthetic and natural fibers.
• Research & Development: Serves as a building block in organic synthesis for pharmaceuticals and advanced materials.
• Photographic Chemicals: Can be utilized in the formulation of certain specialty photographic chemicals.

Basic Information

Product Name	8-p-Toluidinonaphthalene-1-Sulphonic Acid
CAS No.	129-90-8
Molecular Formula	C₁₇H₁₅NO₃S
Molecular Weight	313.37 g/mol
Synonyms	8-(p-Toluidino)-1-naphthalenesulfonic Acid; 1-Naphthalenesulfonic acid, 8-[(4-methylphenyl)amino]-; 8-(4-Methylanilino)naphthalene-1-sulfonic Acid; N-(4-Methylphenyl)-1-naphthalenesulfonamide, 8-amino derivative; C.I. 37515; Acid Yellow 54 (related dye); p-Toluidino-8-naphthalenesulfonic Acid; 8-(p-Tolylamino)-1-naphthalenesulfonic Acid
EINECS	204-963-8

Quality Control

Our 8-p-Toluidinonaphthalene-1-Sulphonic Acid is produced under a strict quality management system. Each batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation (IR), to ensure it meets precise specifications. A comprehensive Certificate of Analysis (COA) detailing all test results is provided with every shipment to guarantee traceability and compliance with your quality requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). Keep away from heat, sparks, and open flame. Ensure the container is kept upright to prevent leakage.

Specification

Item	Specification
Appearance	Yellow to brownish powder or crystals
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 1.0%
Residue on Ignition (Sulfated Ash)	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Individual impurity ≤ 0.5%; Total impurities ≤ 2.0%

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