Chemical Name: Optical brightener OB-1
CAS No.: 1533-45-5
Appearance: Yellow greenish powder
Packaging: 25kg/fiber drum
Assay: 99%
Optical brightener OB-1 CAS 1533-45-5
Description
Optical brightener OB-1 Quick Details
Chemical Name: Optical brightener OB-1
Synonyms: Optical Brighter OB-1; Fluorescent Brightener OB-1; Optical brightener 393; Fluorescent Brightener 393
CAS No.: 1533-45-5
Molecular Formula: C28H18N2O2
Molecular weight: 414.45
Chemical Structure:
Appearance: Yellow greenish powder
Assay: 99%
Optical brightener OB-1 Typical Properties
| Item | Specifications |
| Appearance | Slight greenish yellow powder |
| Content (HPLC) | 98~98.5% |
| Melting point | 352~358℃ |
| Ash content | ≤0.5% |
| Volatile matter | ≤0.5% |
| Max UV Absorption | 374 nm |
| Max Fluorescence Emission | 434 nm |
Optical brightener OB-1 Usage
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High-Temperature Engineering Plastics Whitening : The defining chemical advantage of OB-1 is its extraordinary thermal stability during high-temperature polymer processing (melting point peaks at 359°C). This renders it an irreplaceable whitening agent for engineering polymers requiring aggressive compounding or injection molding matrices, such as Polyethylene Terephthalate (PET/Polyester), Polycarbonate (PC), Polyamides (PA/Nylon), ABS, and Polystyrene (PS). It works by capturing invisible UV wavelengths and converting them into a visible blue-violet fluorescence emission spectra, complementing the inherent yellow tint of polymers to deliver a brilliant, ultra-white finish.
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Polyester Filament & Staple Fiber Spun-Dyeing: Heavily utilized in the synthetic fiber sector, directly mixed into molten polyester matrices prior to extrusion spinning, granting apparel and fabrics permanent, wash-fast whiteness parameters.
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Recycled Plastics Modification: Universally compounded into diverse recycled polymer flakes and regrinds to visually mask the unavoidable yellowing and degradation flaws caused by multi-cycle thermal processing, boosting the aesthetics and value of end-market PCR/PIR goods.
Optical brightener OB-1 Features
1.High whitening strength and strong fluorescence
2.Wide application scope: polyester, nylon fiber and various plastics
2.Fine high-temperature resistance
Optical brightener OB-1 Application method
Recommended dosage: for each 1000 kg material
1. EVA, polypropylene fiber, nylon and Makrolon: 75～200g
2. Polyster fiber: 75～300g
Optical brightener OB-1 Packaging and Shipping
25kg/fiber drum or according to customer requirements cartons, paper bucket, paper bags.
Storage
Store in a cool, dry, and well-ventilated general chemical warehouse. Keep containers hermetically sealed and shielded from moisture and dust ingress.