Description

C.I. Fluorescent Brightener 374:1 is a high-performance stilbene-based optical brightening agent (OBA) designed to enhance the whiteness and brightness of synthetic materials. This compound is critical for manufacturers seeking to achieve superior visual appeal and market competitiveness in their finished products. It is primarily utilized by producers in the plastics, synthetic fibers, and detergent industries where brilliant whiteness is a key quality parameter.

Application

• Primary whitening agent for a wide range of thermoplastics, including polypropylene (PP), polyethylene (PE), and ABS.
• Brightening of synthetic fibers such as polyester, nylon, and acetate during spin finish application or mass pigmentation.
• Key ingredient in high-efficiency laundry detergents and fabric softeners to impart a "whiter-than-white" appearance to textiles.
• Used in the production of paper and paperboard to achieve high brightness grades, especially in coating formulations.
• Application in coatings, inks, and paints to neutralize yellow tones and enhance the purity of white shades.
• Brightening of adhesives and sealants to improve the aesthetic quality of the final bond line or bead.

Basic Information

Product Name	C.I. Fluorescent Brightener 374:1
CAS No.	94395-89-8
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	Fluorescent Brightener 374:1; FB 374:1; Optical Brightener 374:1; 2,2'-(1,2-Ethenediyl)bis[5-[4-[bis(2-hydroxyethyl)amino]-6-(phenylamino)-1,3,5-triazin-2-yl]amino]benzenesulfonic acid disodium salt; Tinopal CBS-X; Blankophor BSU; 4,4'-Bis[[4-[bis(2-hydroxyethyl)amino]-6-(phenylamino)-1,3,5-triazin-2-yl]amino]stilbene-2,2'-disulfonic acid disodium salt
EINECS	Contact for details

Quality Control

Our C.I. Fluorescent Brightener 374:1 is manufactured under a stringent quality management system. Every batch is tested to ensure consistent performance in brightness, hue, and compatibility. Certificates of Analysis (COA) documenting key parameters such as purity, strength, and spectral properties 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 room temperature (15-25°C). Keep away from heat sources and incompatible materials. Under these conditions, the product remains stable for an extended period.

Specification

Item	Specification
Appearance	Yellowish-green powder or granules
Identification (IR)	Conforms to standard
Assay (HPLC)	Min. 98.0%
Brightening Strength	100 ± 3% (vs. Standard)
Shade	Neutral to bluish white
Moisture Content	Max. 1.0%
Ash Content	Max. 0.5%
Solubility (in water)	Clear, complete solution

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