Description

2-Naphthalenecarboxylic acid, 3-hydroxy-4-[(4-methyl-3-sulfophenyl)azo]-, strontium salt (1:1) is a high-purity, organometallic azo dye intermediate. This compound is valued for its role in producing vivid and stable colorants, particularly in applications requiring specific metal ion coordination. It is primarily sought by manufacturers in the pigments, inks, and specialty coatings industries for developing high-performance color systems. The product is supplied with a commitment to consistent quality and reliable supply chain logistics for global B2B partners.

Application

• Pigment Manufacturing: A key intermediate for the synthesis of high-grade, light-fast organic pigments, especially red and maroon shades.
• Industrial Inks: Used in the production of inks for packaging, printing, and coding applications where color consistency is critical.
• Specialty Coatings: Imparts color and stability to coatings for plastics, automotive finishes, and industrial equipment.
• Textile Dyes: Serves as a precursor for dyes used in coloring synthetic and natural fibers.
• Plastics and Polymers: Employed as a colorant masterbatch additive for coloring engineering plastics and consumer goods.
• Research & Development: Used in chemical research for developing new colorant molecules and studying azo dye chemistry.

Basic Information

Product Name	2-Naphthalenecarboxylic acid, 3-hydroxy-4-[(4-methyl-3-sulfophenyl)azo]-, strontium salt (1:1)
CAS No.	129984-37-8
Molecular Formula	C18H11N2O6SSr
Molecular Weight	479.93 g/mol
Synonyms	Strontium 3-Hydroxy-4-[(4-methyl-3-sulfophenyl)azo]-2-naphthoate; C.I. Pigment Red 57:2; Strontium Lake Red C; 3-Hydroxy-4-[(4-methyl-3-sulfophenyl)azo]-2-naphthalenecarboxylic Acid Strontium Salt; Lithol Rubine BCA Strontium Salt; Pigment Red 57:2; Naphthol AS-BI Strontium Salt (related intermediate); Azo Strontium Lake
EINECS	Contact for details

Quality Control

Our production of 2-Naphthalenecarboxylic acid, 3-hydroxy-4-[(4-methyl-3-sulfophenyl)azo]-, strontium salt (1:1) adheres to stringent quality management protocols. Each batch undergoes rigorous analytical testing to ensure compliance with industry specifications for purity, color strength, and metallic content. Certificates of Analysis (COA) detailing specific batch results are available upon request to support your quality assurance and regulatory needs.

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). Keep away from incompatible materials such as strong oxidizing agents. The product is light-sensitive (store away from light).

Specification

Item	Specification
Appearance	Red to maroon powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 2.0%
Sulfated Ash	Meets target range
Heavy Metals (as Pb)	≤ 20 ppm
Solubility	Slightly soluble in water; soluble in alkaline solutions

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