Description

Pentasodium 5-[[6-amino-1-hydroxy-3-sulphonato-5-[(3-sulphonatophenyl)azo]-2-naphthyl]azo]-6-methoxy-8-[[7-sulphonato-4-[(3-sulphonatophenyl)azo]naphthyl]azo]naphthalene-2-sulphonate is a high-performance, multi-sulphonated azo dye intermediate of significant industrial importance. This compound is engineered to deliver exceptional color strength and stability, making it a critical component for producing vivid and durable dyes and pigments. It is primarily utilized by manufacturers in the textile, ink, and specialty coatings industries who require reliable, high-purity intermediates for their production processes.

Application

• Textile Dyeing: A key intermediate for synthesizing reactive and direct dyes for cotton, wool, and nylon, offering excellent wash and light fastness.
• Ink Manufacturing: Used in the production of high-quality printing inks, including those for packaging and publications, due to its intense color properties.
• Pigment Production: Serves as a precursor for creating organic pigments used in plastics, paints, and coatings.
• Leather Coloring: Employed in the formulation of dyes for the leather tanning and finishing industry.
• Paper Coloring: Utilized in the manufacture of dyes for specialty and decorative papers.
• Research & Development: Acts as a standard or building block in chemical research for developing new colorants and functional materials.

Basic Information

Item	Detail
Product Name	Pentasodium 5-[[6-amino-1-hydroxy-3-sulphonato-5-[(3-sulphonatophenyl)azo]-2-naphthyl]azo]-6-methoxy-8-[[7-sulphonato-4-[(3-sulphonatophenyl)azo]naphthyl]azo]naphthalene-2-sulphonate
CAS No.	71767-19-6
Molecular Formula	C48H28N8Na5O20S5
Molecular Weight	Approx. 1387.0 g/mol
Synonyms	Reactive Black 5 (tetrasodium salt precursor); C.I. 20505; Pentasodium 8-amino-2-[[7-sulphonato-4-[(4-sulphonatophenyl)azo]-1-naphthyl]azo]-1-hydroxy-3,6-disulphonato-2-naphthalenecarboxylate (related isomer); Azo Black; Multi-sulphonated bis-azo dye intermediate; Acid Black 1 related compound; Direct Black 22 intermediate
EINECS	Contact for details

Quality Control

Our pentasodium azo dye intermediate is produced under a stringent quality management system. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure it meets precise specifications for dye synthesis. Certificates of Analysis (COA) documenting purity, heavy metal content, and other critical parameters are provided to guarantee batch-to-batch consistency and compliance with industry standards.

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 product is hygroscopic (moisture-sensitive) and light-sensitive; prolonged exposure to air or light should be avoided to maintain stability and performance.

Specification

Item	Specification
Appearance	Dark blue to black powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
Sulfated Ash	25.0 - 35.0%
Heavy Metals (as Pb)	≤ 20 ppm
Water Solubility	Freely soluble

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