Description

5-Amino-8-(4-Hydroxyphenylamino)Naphthalene-2-Sulfonicacid is a specialized aromatic sulfonic acid derivative that serves as a key intermediate in the synthesis of high-value functional dyes and pigments. Its molecular structure, featuring both amino and hydroxyphenylamino groups, makes it a versatile precursor for creating compounds with specific chromophoric and auxochromic properties. This chemical is primarily utilized by manufacturers in the dye and pigment industry, as well as by research institutions developing advanced materials and analytical reagents.

Application

• Dye and Pigment Intermediate: A critical building block for the synthesis of azo dyes, acid dyes, and other complex colorants used in textiles, inks, and coatings.
• Research & Development: Used in academic and industrial R&D labs for developing novel chromophores, fluorescent markers, and specialty organic compounds.
• Analytical Reagent: Potential use as a reagent or standard in analytical chemistry for method development and calibration.
• Functional Material Synthesis: Serves as a precursor in the production of organic electronic materials or photoactive compounds.

Basic Information

Product Name	5-Amino-8-(4-Hydroxyphenylamino)Naphthalene-2-Sulfonicacid
CAS No.	118-21-8
Molecular Formula	C₁₆H₁₅N₃O₄S
Molecular Weight	345.37 g/mol
Synonyms	5-Amino-8-(4-hydroxyphenylamino)naphthalene-2-sulfonic acid; 8-Anilino-5-amino-2-naphthalenesulfonic acid; 5-Amino-8-anilino-2-naphthalenesulfonic acid; 1-Naphthalenesulfonic acid, 5-amino-8-[(4-hydroxyphenyl)amino]-; C.I. 37720; Acid Black 107; 118-21-8; 5-Amino-8-(p-hydroxyphenylamino)-2-naphthalenesulfonic acid
EINECS	204-238-9

Quality Control

Our production of 5-Amino-8-(4-Hydroxyphenylamino)Naphthalene-2-Sulfonicacid adheres to stringent quality management protocols. Each batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation via IR and NMR spectroscopy, to ensure it meets precise customer specifications. A Certificate of Analysis (COA) detailing all test results is provided with every 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 a controlled room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept sealed to prevent absorption of atmospheric moisture, which can affect product quality and stability.

Specification

Item	Specification
Appearance	Brown to dark brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 2.0%
Residue on Ignition (Sulfated Ash)	≤ 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.