Description

4,5-Dihydroxy-3-(1-Naphthalenylazo)-2,7-Naphthalenedisulfonic Acid is a high-purity azo dye intermediate and analytical reagent. This compound is valued for its strong chromophoric properties and ability to form stable complexes with metal ions, making it a critical component in specialized colorant synthesis and chemical analysis. It is primarily required by manufacturers in the dye and pigment industry, as well as by research laboratories for use as a chelating agent and indicator in analytical chemistry.

Application

• Dye and Pigment Synthesis: A key intermediate for producing high-value, complex azo dyes and pigments, particularly for textiles, inks, and specialty coatings.
• Analytical Chemistry Reagent: Used as a chelating agent and colorimetric indicator in the detection and quantification of specific metal ions in laboratory settings.
• Research & Development: Serves as a building block in organic synthesis for novel chromophores and functional materials in academic and industrial R&D.
• Photographic Chemicals: Potential application in the formulation of specialized light-sensitive chemicals for photographic and imaging processes.
• Complexometric Titration: Employed as an indicator in titrations involving metal ions due to its distinct color change upon complexation.

Basic Information

Product Name	4,5-Dihydroxy-3-(1-Naphthalenylazo)-2,7-Naphthalenedisulfonic Acid
CAS No.	62106-17-6
Molecular Formula	C₂₀H₁₄N₂O₈S₂
Molecular Weight	474.46 g/mol
Synonyms	1-Naphthaleneazochromotropic Acid; 3-(1-Naphthylazo)-4,5-dihydroxy-2,7-naphthalenedisulfonic Acid; Chromotrope 1B; Acid Chrome Blue B; C.I. 16575; Mordant Blue 1; 4,5-Dihydroxy-3-(1-naphthylazo)-2,7-naphthalenedisulfonic Acid
EINECS	Contact for details

Quality Control

Our production of 4,5-Dihydroxy-3-(1-Naphthalenylazo)-2,7-Naphthalenedisulfonic Acid adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure it meets precise customer specifications and consistent performance standards. Certificates of Analysis (COA) documenting all critical parameters are available upon request.

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 material is light-sensitive and should be handled accordingly to maintain stability.

Specification

Item	Specification
Appearance	Dark brown to reddish-brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 2.0%
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.