Uvitex/Tinopal OB, Optical Brightener OB

Chemical Name:


Formula C26H26N2O2S  optical-brightener-ob-tinopal-OB-chemical-structure
MW      430
CAS# 7128-64-5

Synonym Name:

BASF Uvitex Ob, Tinopal OB,  Fluorescent Brightener 184 (FB 184) , c.i.184, Fluorescent Brightener OB


Appearance Slight greenish-yellow powder
Dosage 0.01-0.05%
Melting point 196-200℃
Purity ≥99%
Solubility (g/100 g solution) at 20° C:
Acetone 0.5
Chloroform 14
Dimethylformamide 0.8
Dioxane 2
n-Hexane 0.2
Methanol <0.1
Methylethylketone 1.3
Tricresylphosphate 0.8
Xylene 5


>Optical Brightener are used to offset the yellowness of a polymer and yield a whiter appearance. OB is used as thermoplastic (PVC, PS, PE, PP, ABS) optical brightener. Also for coatings, printing inks, paints, dyes, manufactured fibers, synthetic leather, waxes, fats, and oils.  Ob is a general-purpose optical brightener agent.

>Recommended concentrations: 0.02-5% depending on the application and degree of desired whiteness.

Handing and Safety: 

>FDA approved for use in polymers subject to the limitations in 21 CFR §176.170(c).

>For additional handing and toxicological information, please consult us for Maternal Safety Date Sheet.


25kg per fiber drum, 6*2 layer 12 drums per pallet, 5CBM per ton,or according to customers’ requirements.


Tinopal & Uvitex OB, Optical Brightener OB, CAS 7128-64-5, FBA 184 msds

Tinopal & Uvitex OB, Optical Brightener OB, CAS 7128-64-5, FBA 184 tds

Need Sample or Quote?

[wpforms id=”7″]

Related Products

Optical brightener for plastics, cotton, detergent, paper

Product Synonyms CAS Number Features

Optical Brightener For Plastics

FP-127 Uvitex FP 40470-68-6 the best OBA for PVC products
KCB Hostalux KCB 5089-22-5 OBA for plastics and lacquer, especial for EVA
KSB Telalux KSB 7128-54-5 OBA for transparent plastics, recycled PE/PP
KSN Hostalux KSN 5242-49-9 OBA For high-temperature plastics, 100% counter
OB Uvitex OB, Tinopal OB 7128-64-5 universal plastic OBA, also for ink, coating
OB-1 Eastobrite OB-1 1533-45-5 universal plastic OBA,  green or yellow shade
PF FBA 135 1041-00-5 strong red shade

Optical Brightener For Cotton

4BK FBA 113 12768-91-1 for cotton or with fabic blend, red or blue shade
ER-I FBA 199 13001-39-3 powder & liquid form, PE, PA, CA fiber, high temperature whitening
ER-II FBA 199:1 13001-38-2 powder & liquid form, PE, PA, CA fiber, lower temperature whitening
EBF FBA 185 12224-41-8

Optical Brightener For Detergent

CBS-X Tinopal CBS-X 27344-41-8 for detergent, soap, washing

Optical Brightener For Paper

VBL FBA 85 12224-16-7 for paper, also for cotton, vinylon, nylon
BBU FBA 220 16470-24-9 Replace VBL