Description

(8E)-8-[(2,5-Disulfophenyl)Hydrazinylidene]-7-Oxo-Naphthalene-1,3-Disulfonic Acid is a high-purity, multi-sulfonated aromatic compound that serves as a critical intermediate and functional dye precursor. Its value lies in its unique molecular structure, which provides excellent water solubility and strong chelating properties for metal ions. This chemical is essential for manufacturers in the dye and pigment, analytical reagent, and specialty chemical synthesis industries seeking precise and reliable performance.

Application

• Dye and Pigment Intermediate: A key precursor for the synthesis of acid dyes, reactive dyes, and metal-complex dyes, particularly for textiles like wool, silk, and nylon.
• Analytical Chemistry Reagent: Used as a chromogenic agent or complexometric indicator in spectrophotometric methods for the detection and quantification of specific metal ions.
• Chemical Synthesis Building Block: Employed in organic synthesis to introduce sulfonic acid groups and hydrazone functionalities into more complex molecules for pharmaceuticals or agrochemicals.
• Laboratory Research: Serves as a model compound in photochemical and coordination chemistry studies due to its light-sensitive and metal-binding characteristics.

Basic Information

Product Name	(8E)-8-[(2,5-Disulfophenyl)Hydrazinylidene]-7-Oxo-Naphthalene-1,3-Disulfonic Acid
CAS No.	78335-10-1
Molecular Formula	C₁₆H₁₀N₂O₁₃S₄
Molecular Weight	598.51 g/mol
Synonyms	8-[(2,5-Disulfophenyl)hydrazono]-7-oxo-1,3-naphthalenedisulfonic Acid; C.I. 27290; Acid Orange 74; 7-Oxo-8-[(2,5-disulfophenyl)hydrazinylidene]naphthalene-1,3-disulfonic Acid; 1,3-Naphthalenedisulfonic acid, 8-[(2,5-disulfophenyl)hydrazono]-7-oxo-; (8E)-8-[(2,5-Disulfophenyl)hydrazinylidene]-7-oxonaphthalene-1,3-disulfonate
EINECS	Contact for details

Quality Control

Every batch of (8E)-8-[(2,5-Disulfophenyl)Hydrazinylidene]-7-Oxo-Naphthalene-1,3-Disulfonic Acid is produced and tested under a strict quality management system. We ensure consistent high purity and performance suitable for industrial and laboratory applications. Comprehensive Certificates of Analysis (COA) detailing identity, purity, and impurity profiles are provided with each shipment to guarantee supply reliability and batch-to-batch consistency.

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 stability and performance.

Specification

Item	Specification
Appearance	Orange to brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Heavy Metals (as Pb)	≤ 20 ppm
Sulfated Ash	≤ 0.5%

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