Description

Disodium 2,2'-(Azodi-p-Phenylene)Bis[6-Methylbenzothiazolesulphonate] is a specialized organic salt belonging to the benzothiazole class, widely recognized for its role as a high-performance photoinitiator and photosensitizer. This compound is critical for industrial processes requiring precise control over light-induced polymerization and cross-linking reactions. It is primarily utilized by manufacturers in the polymer, coatings, and advanced materials sectors seeking reliable and efficient UV-curing solutions.

Application

• UV-Curable Coatings and Inks: Acts as a key photoinitiator for rapid curing in wood, plastic, and metal coatings, as well as in graphic arts and packaging inks.
• Photopolymer Printing Plates: Serves as a photosensitizer in the production of flexographic and letterpress plates, enabling high-resolution image formation.
• Adhesives and Sealants: Facilitates fast, on-demand curing in pressure-sensitive and structural adhesives for electronics and automotive assembly.
• Optical Fiber Coatings: Used in the UV-curable primary and secondary coatings that protect glass fibers, ensuring signal integrity and durability.
• Dental Composites and Restoratives: Employed as a photoinitiator in light-cured dental materials for precise and rapid setting.
• 3D Printing (Stereolithography): Functions as a photoactive component in resin formulations for additive manufacturing, controlling layer-by-layer solidification.
• Electronic Encapsulants and Potting Compounds: Enables the UV curing of protective resins for semiconductors and circuit boards.

Basic Information

Product Name	Disodium 2,2'-(Azodi-p-Phenylene)Bis[6-Methylbenzothiazolesulphonate]
CAS No.	71033-21-1
Molecular Formula	C28H18N4Na2O6S4
Molecular Weight	688.66 g/mol
Synonyms	Disodium 2,2'-(1,2-Ethenediyl)bis[5-methylbenzothiazole]-7-sulfonate; 2,2'-(1,2-Ethenediyl)bis[5-methyl-7-benzothiazolesulfonic acid] disodium salt; Photoinitiator 369; UV-369; CGI 369; Disodium 2,2'-(Ethene-1,2-diyl)bis(5-methyl-1,3-benzothiazole-7-sulfonate); 71033-21-1; Bis(5-methyl-7-sulfobenzothiazol-2-yl)ethene disodium salt
EINECS	Contact for details

Quality Control

Our Disodium 2,2'-(Azodi-p-Phenylene)Bis[6-Methylbenzothiazolesulphonate] is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure it meets precise specifications for photoinitiator applications. Certificates of Analysis (COA) documenting key parameters such as assay, absorbance, and residual solvents are available upon request to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after opening to prevent absorption of atmospheric moisture, which can affect performance.

Specification

Item	Specification
Appearance	Yellow to orange-yellow powder
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	≥ 98.0%
UV-Vis Absorbance (λmax)	Conforms
Loss on Drying	≤ 2.0%
Residue on Ignition (Sulfated Ash)	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm
Residual Solvents (GC)	Meets ICH guidelines

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