Description

Optical Brightener Ob-1 is a high-performance stilbene derivative widely recognized for its exceptional whitening and brightening properties. This agent is critical for enhancing the perceived whiteness and brightness of materials by absorbing ultraviolet light and re-emitting it as visible blue light. It is an essential component for manufacturers in the plastics, synthetic fibers, detergent, and paper industries seeking to achieve superior product aesthetics and quality. The compound is supplied under stringent quality controls to ensure batch-to-batch consistency and performance reliability for industrial applications.

Application

• Plastics and Polymers: Primary application for whitening and brightening PVC, polyethylene, polypropylene, ABS, and other thermoplastics to achieve a brilliant white appearance.
• Synthetic Fibers: Used in the production of polyester, nylon, and acrylic fibers to correct yellowness and enhance the brightness of textiles and fabrics.
• Detergent and Soap Industry: Incorporated into laundry detergents, fabric softeners, and soaps to impart a "whiter-than-white" look to laundered clothing.
• Paper Manufacturing: Applied in the coating and sizing of high-quality papers, including photographic paper and art paper, to improve brightness and opacity.
• Coatings and Inks: Utilized in certain coatings, paints, and printing inks where optical brightening effects are required.
• Masterbatch Production: A key additive for creating concentrated whitening masterbatches used across multiple polymer processing operations.

Basic Information

Item	Detail
Product Name	Optical Brightener Ob-1
CAS No.	1533-45-5
Molecular Formula	C40H38N12O8S2Na2
Molecular Weight	924.96 g/mol
Synonyms	Tinopal OB; 4,4'-Bis(2-benzoxazolyl)stilbene; 2,2'-(1,2-Ethenediyl)bis[5-methylbenzoxazole]; OB-1; Fluorescent Brightener OB-1; Benzenesulfonic acid, 2,2'-(1,2-ethenediyl)bis[5-methyl-, sodium salt (1:2); C.I. Fluorescent Brightener 393; FBA 393
EINECS	216-258-1

Quality Control

Every batch of Optical Brightener Ob-1 is manufactured and tested under a strict quality management system. We ensure the product meets high-purity standards suitable for industrial applications, with key parameters including brightening strength, hue, and solubility rigorously verified. A Certificate of Analysis (COA) detailing purity, physical properties, and performance tests is provided with each shipment to guarantee compliance with your specifications.

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 heat sources and incompatible materials. Under these conditions, the product remains stable for extended periods.

Specification

Item	Specification
Appearance	Yellowish-green powder
Identification (IR)	Conforms
Assay (HPLC)	≥ 98.0%
Brightening Strength	100 ± 3% (vs. Standard)
Moisture Content	≤ 1.0%
Ash Content	≤ 0.5%
Solubility	Freely soluble in common organic solvents

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