Description

8-(Hydroxy-Ko)-7-[[2-(Hydroxy-Ko)-5-[(2-Hydroxyethyl)Sulfonyl]Phenyl]Azo-Kn1]-1,3,6-Naphthalenetrisulfonato(5-)]Cuprate(3-), Sodium is a high-purity, water-soluble copper complex dye characterized by its azo and sulfonate functional groups. This compound is engineered for applications requiring precise color properties and excellent stability in aqueous systems. It is primarily utilized by manufacturers in the textile, specialty ink, and advanced material coating industries where consistent performance and batch-to-batch uniformity are critical.

Application

• Textile Dyeing: As a key colorant for synthetic fibers, particularly where bright, wash-fast shades are required.
• Functional Inks: Used in the formulation of inks for digital textile printing and security marking applications.
• Industrial Coatings: Provides coloration for coatings and paints where water solubility and metal complex stability are advantageous.
• Research & Development: Serves as a chemical intermediate or reference standard in the development of new dyes and pigments.
• Paper Coloring: Employed in specialty paper products requiring specific color tones and good bleed resistance.
• Biological Staining: Potential use as a histological stain in laboratory settings due to its metal-complex structure.

Basic Information

Product Name	8-(Hydroxy-Ko)-7-[[2-(Hydroxy-Ko)-5-[(2-Hydroxyethyl)Sulfonyl]Phenyl]Azo-Kn1]-1,3,6-Naphthalenetrisulfonato(5-)]Cuprate(3-), Sodium
CAS No.	749887-18-1
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	Sodium Copper Azo Naphthalene Trisulfonate Complex; C.I. Reactive Blue 250 (related complex); Copper complex of hydroxyazo naphthalenetrisulfonic acid; Azo metal complex dye; Trisulfonated copper azo dye; Water-soluble copper chelate dye; HE-Sulfonyl phenyl azo naphthalene dye copper complex
EINECS	Contact for details

Quality Control

Our production of this copper complex dye adheres to stringent quality management systems to ensure product consistency and performance. Each batch is analyzed for critical parameters including color strength, hue, and impurity profile. Certificates of Analysis (COA) documenting purity, assay, and key physical-chemical properties are provided with every shipment and are available upon request.

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 when not in use to prevent absorption of atmospheric moisture, which can affect product performance.

Specification

Item	Specification
Appearance	Dark blue to violet powder or solid
Identification (IR)	Conforms to structure
Assay (HPLC)	Min. 95%
Loss on Drying	Max. 5.0%
Sulfated Ash	Max. 20.0%
Heavy Metals (as Pb)	Max. 20 ppm
Solubility (in Water)	Completely soluble
pH (1% Solution)	6.0 - 8.0

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