Optical Brightener

Optical Brightener Specification

Form
Powder

Poisonous
Yes

Boiling point
Not applicable (decomposes before boiling)

Ph Level
7 (neutral)

HS Code
32042000

Solubility
Insoluble in water, soluble in organic solvents such as ethanol and chloroform

Storage
Store in a cool, dry place

Melting Point
230C (approx)

Density
1.35 Gram per cubic centimeter(g/cm3)

Taste
Odorless

Purity
99% (min)

Other Names
OB, Brightener OB, Fluorescent Brightener

Structural Formula
C28H18N2O2

Molecular Weight
414.46 g/mol

Molecular Formula
C28H18N2O2

Shape
Powder

Smell
Odorless

Classification
Optical Brightener

Chemical Name
4,4-Bis(benzoxazol-2-yl)stilbene

CAS No
1533-45-5

EINECS No
223-075-2

Grade
Industrial Grade

Standard
As per industry standards

Type
Fluorescent Whitening Agent

Usage
Industrial

Main Material
Stilbene Derivative

Application
Textile, Plastic, Paper, Detergents, and Paint Industries

Optical Brightener Trade Information

Minimum Order Quantity
1 Kilograms

Supply Ability
1000 Kilograms Per Week

Delivery Time
Days

About Optical Brightener

Optical brighteners orfluorescent whitening agents(FWAs), are chemical compounds that absorb light in theultravioletand violet region. These additives are often used to enhance the appearance of color offabricandpaper, causing a "whitening" effect. Brighteners are commonly added tolaundry detergentsto make the clothes appear cleaner. Normally cleaned laundry appears yellowish, which consumers do not like. Optical brighteners have replacedbluingwhich was formerly used to produce the same effect.

Usage

Detergent whitener (instead of bluing agents)
Paper brightening(internalor in acoating)
Fiber whitening (internal, added to polymer melts)
Textile whitening (external, added tofabric finishes)
Color-correcting or brightening additive in advancedcosmeticformulas (shampoos, conditioners, eye makeup)

Packaging- 25 kg sealed drums/ loose by weight

Specifications

Chemical Name	Tinopal
Appearance	Fluorescent Green
Form	Powder
Moisture (%)	4.98%
Ionic Nature	Anionic
Chemical construction	Derivative of stilebene disulphonic acid

Exceptional Brightening Performance

Optical Brightener OB delivers superior whitening effects, owing to its stilbene derivative composition. With maximum absorption at 375 nm and emission at 435 nm, it enhances the brightness of materials by converting ultraviolet light into visible blue light. Its excellent light fastness and micronized particle size ensure efficient dispersion and lasting optical results across applications.

Reliable Stability and Compatibility

Designed for industrial use, Optical Brightener OB maintains consistent performance under high heat and light exposure. It integrates smoothly with most polymers and detergent formulations, without altering the pH or impacting the finished product. This makes it ideal for processes that require high reliability and versatile usage.

Safe, Pure, and Easy to Store

Produced to meet stringent industry standards, Optical Brightener OB is non-poisonous and neutral in pH, ensuring operator safety. Its high purity, odorless nature, and stable structure allow for straightforward storage in cool, dry conditions. The quality and form of the product are retained for up to two years from manufacture.

FAQs of Optical Brightener:

Q: How is Optical Brightener OB used in industrial applications?

A: Optical Brightener OB is incorporated into products like textiles, plastics, paper, detergents, and paints to enhance their visual brightness. Its typical dosage ranges from 0.01% to 0.05% by weight, depending on the material and desired effect.

Q: What makes Optical Brightener OB effective in whitening?

A: Its stilbene derivative structure absorbs UV light at 375 nm and emits visible blue light at 435 nm, which masks yellowish tones and visibly brightens treated materials, making colors appear cleaner and more vibrant.

Q: When should I add Optical Brightener OB during manufacturing?

A: OB should be added during the mixing or compounding stages to ensure uniform dispersion throughout the base material, whether its a polymer melt, slurry, or detergent mixture.

Q: Where can Optical Brightener OB be stored to maintain quality?

A: It should be stored in a cool, dry place, away from direct sunlight, and in its original 25 kg fiber drum or suitable container, to preserve stability and prevent contamination.

Q: What is the process to ensure compatibility in formulations?

A: Preliminary compatibility tests with host polymers or detergent bases are recommended. OB is generally soluble in organic solvents but insoluble in water, so formulation should consider solvent compatibility.

Q: What benefits does Optical Brightener OB offer over traditional whitening agents?

A: OB provides superior light fastness, excellent heat stability, and a neutral pH, which ensures non-reactivity and persistent brightness, while also being safe and non-toxic.

Q: Is Optical Brightener OB safe for industrial use?

A: Yes, OB is non-poisonous, odorless, and stable when handled as recommended. Users should follow standard industrial safety and storage guidelines for optimal results.

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