Description

1,1'-Methylenebisnaphthalene-2-Sulphonic Acid is a specialized organic sulfonic acid derivative, valued for its role as a key intermediate in the synthesis of high-performance dyes and pigments. Its molecular structure provides excellent chromophoric and auxochromic properties, making it essential for creating vivid and stable colorants. This compound is primarily sought by manufacturers in the dye and pigment industry, as well as by research institutions developing advanced functional materials.

Application

• Dye and Pigment Intermediate: A crucial building block for the synthesis of acid dyes, direct dyes, and reactive dyes, particularly for textiles, leather, and paper.
• Optical Brightener Production: Used in the manufacture of fluorescent whitening agents (FWAs) for detergents, papers, and plastics.
• Chemical Synthesis: Serves as a sulfonating agent and a versatile intermediate in organic synthesis for pharmaceuticals and agrochemicals.
• Research & Development: Employed in academic and industrial R&D for developing novel chromophores and functional polymers.
• Analytical Chemistry: Can be used as a standard or reagent in specific analytical methods due to its distinct spectral properties.

Basic Information

Product Name	1,1'-Methylenebisnaphthalene-2-Sulphonic Acid
CAS No.	84-90-2
Molecular Formula	C₂₁H₁₆O₆S₂
Molecular Weight	428.48 g/mol
Synonyms	Dinaphthylmethanedisulfonic Acid; 1,1'-Methylenedi(2-naphthalenesulfonic acid); Bis(2-naphthalenesulfonic acid)methane; 2,2'-Methylenebis(naphthalene-1-sulfonic acid) (alternate numbering); Dinaphthylmethane-2,2'-disulfonic Acid; 4,4'-Methylenedi-1-naphthalenesulfonic acid; MBNSA; Contact for additional trade names.
EINECS	201-594-7

Quality Control

Our production of 1,1'-Methylenebisnaphthalene-2-Sulphonic Acid adheres to stringent quality management protocols. Each batch is analyzed to ensure consistent purity and meets the specifications required for high-performance industrial synthesis. A comprehensive Certificate of Analysis (COA), detailing parameters such as assay, impurity profile, and physical characteristics, is provided with every shipment to guarantee traceability and batch-to-batch consistency.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area away from incompatible materials such as strong bases and oxidizing agents. Due to its nature as a strong acid/organic solvent, appropriate secondary containment is recommended. Recommended long-term storage temperature is 15-25°C.

Specification

Item	Specification
Appearance	Off-white to light yellow powder or crystals
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 2.0%
Sulfated Ash	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Total impurities ≤ 5.0%

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