Description

4-[(5-Chloro-4-Methyl-2-Sulphophenyl)Azo]-3-Hydroxynaphthalene-2,7-Disulphonic Acid, Strontium Salt is a high-purity, organometallic azo dye intermediate. This compound is valued for its role as a key precursor in synthesizing high-performance pigments and colorants, offering excellent lightfastness and thermal stability. It is primarily required by manufacturers in the specialty chemicals, advanced pigments, and textile dye industries for producing vivid and durable colors.

Application

• Primary intermediate for the synthesis of high-performance azo pigments and dyes.
• Key component in manufacturing industrial colorants for plastics, inks, and coatings.
• Used in the production of specialized textile dyes, particularly for fibers requiring excellent wash and light fastness.
• Precursor for strontium-based lake pigments used in cosmetics and food contact materials (where compliant).
• Employed in research and development of novel colorimetric sensors and functional dyes.
• Raw material for specialty chemical production in the automotive and construction material sectors.

Basic Information

Product Name	4-[(5-Chloro-4-Methyl-2-Sulphophenyl)Azo]-3-Hydroxynaphthalene-2,7-Disulphonic Acid, Strontium Salt
CAS No.	84682-08-6
Molecular Formula	C₁₇H₁₀ClN₂O₁₀S₃Sr
Molecular Weight	Approx. 648.0 g/mol
Synonyms	Strontium Salt of 4-[(5-Chloro-4-Methyl-2-Sulphophenyl)Azo]-3-Hydroxy-2,7-Naphthalenedisulphonic Acid; C.I. Pigment Red 48:3; Pigment Red 48:3; Strontium 4-[(5-chloro-4-methyl-2-sulfophenyl)azo]-3-hydroxy-2,7-naphthalenedisulfonate; 5-Chloro-4-methyl-2-[(3-hydroxy-2,7-disulfo-1-naphthalenyl)azo]benzenesulfonic Acid Strontium Salt; C.I. 15865:3; Strontium Lake of CI 15865; Strontium 2-(5-chloro-4-methyl-2-sulfophenylazo)-1-hydroxy-3,6-naphthalenedisulfonate
EINECS	Contact for details

Quality Control

Our production of this azo dye intermediate adheres to stringent quality control protocols to ensure batch-to-batch consistency and high purity. Each lot is tested against rigorous internal specifications, and a comprehensive Certificate of Analysis (COA) detailing purity, identity, and impurity profiles is available upon request. We support compliance with relevant global chemical management frameworks.

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 (store away from light) and hygroscopic (moisture-sensitive); protect from moisture and incompatible materials.

Specification

Item	Specification
Appearance	Red to reddish-brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Sulfated Ash	Consistent with strontium salt form
Heavy Metals (as Pb)	≤ 20 ppm
Solubility	Soluble in water; insoluble in organic solvents

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