Description

Trisodium 5-[[[6-[(2-Chloroethyl)Sulphonyl]Bicyclo[2.2.1]Hept-2-Yl]Carbonyl]Amino]-4-Hydroxy-3-[(1-Sulphonato-2-Naphthyl)Azo]Naphthalene-2,7-Disulphonate CAS NO 85895-84-7 is a highly specialized reactive azo dye derivative featuring a norbornane-based chloroethylsulphonyl electrophile and multiple anionic sulphonate groups. It serves as a high-performance crosslinking chromophore designed for covalent immobilization onto nucleophilic substrates—particularly in advanced functional textile dyes, diagnostic reagent conjugates, and photo-patternable biomaterials. This compound is essential for manufacturers requiring precise, light-triggered covalent coupling under mild aqueous conditions, especially in life science tools, specialty coatings, and high-value technical textiles.

Application

• Covalent labeling of proteins and antibodies for ELISA, lateral flow assays, and immunohistochemistry
• Reactive dye intermediate for moisture-wicking, UV-stabilized performance textiles (e.g., sportswear, military fabrics)
• Crosslinking agent in photoresist formulations for microfluidic device fabrication
• Chromophore anchor in solid-phase synthesis of dye-conjugated oligonucleotides and peptide arrays
• Functional component in stimuli-responsive hydrogels for controlled drug release systems
• Key intermediate in the production of high-affinity affinity dyes for chromatographic separation media

Basic Information

Product Name	Trisodium 5-[[[6-[(2-Chloroethyl)Sulphonyl]Bicyclo[2.2.1]Hept-2-Yl]Carbonyl]Amino]-4-Hydroxy-3-[(1-Sulphonato-2-Naphthyl)Azo]Naphthalene-2,7-Disulphonate
CAS No.	85895-84-7
Molecular Formula	C33H24ClN4Na3O13S3
Molecular Weight	913.16 g/mol
Synonyms	Reactive Blue 218; C.I. Reactive Blue 218; TRISODIUM 5-(((6-((2-CHLOROETHYL)SULFONYL)BICYCLO[2.2.1]HEPT-2-YL)CARBONYL)AMINO)-4-HYDROXY-3-((1-SULFONATO-2-NAPHTHYL)AZO)NAPHTHALENE-2,7-DISULFONATE; Trisodium [5-[[[6-[(2-chloroethyl)sulphonyl]bicyclo[2.2.1]hept-2-yl]carbonyl]amino]-4-hydroxy-3-[(1-sulphonato-2-naphthyl)azo]naphthalene-2,7-disulphonate]; Reactive Blue MX-G; C.I. 62620; TBS-218
EINECS	Not listed (not pre-1981; requires notification under REACH)

Quality Control

Our products undergo rigorous quality testing to ensure compliance with industry standards. Certificates of Analysis (COA) are available upon request. All batches conform to ISO 9001:2015 certified manufacturing protocols, with full traceability from raw material sourcing to final packaging. Testing includes identity confirmation (HPLC retention time + UV-Vis spectral match), assay (≥95.0% by HPLC), heavy metals (≤10 ppm), and residual solvents (ICH Q3C compliant). Regulatory documentation supports REACH registration, RoHS compliance, and non-GMO certification.

Storage

Preserve in a tightly closed container, protected from light. Store at 15–25°C in a dry, well-ventilated area. Due to its hygroscopic nature, minimize exposure to ambient humidity; use desiccant-lined secondary packaging during long-term storage. Avoid contact with strong alkalis, fluoride sources, or oxidizing agents.

Specification

Item	Specification
Appearance	Dark blue to black crystalline powder
Identification (HPLC)	Retention time matches reference standard ±2%
Identification (UV-Vis)	λmax in water: 598–604 nm; shoulder at 352–358 nm
Assay (HPLC)	≥95.0%
Moisture (Karl Fischer)	≤5.0%
Heavy Metals (as Pb)	≤10 ppm
Water Insolubles	≤0.1%
pH (1% aqueous solution)	6.0–7.5

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