Polyolefin compatibility
The octyloxy chain gives good compatibility in PE and PP.
UV-531 Benzophenone UV Absorber Supplier
SUNSORB® 531 (UV-531) is a benzophenone UV absorber with good compatibility in polyolefins and PVC. It is a cost-effective, widely used choice for agricultural film, outdoor polyolefin parts and PVC.
CAS 1843-05-6 · Benzophenone · UV absorber
Descripción general del producto
UV-531 (2-hydroxy-4-n-octyloxybenzophenone) absorbs UV light in the 240–340 nm range and has good compatibility with PE, PP and PVC thanks to its octyloxy chain. It is often used with a HALS in agricultural and outdoor films.
Typical specification. Every shipment is supplied with a batch COA; the limits that apply to your order are confirmed in the quotation and contract.
Key Benefits
Rentable
Widely used and economical for general outdoor protection.
Easy dispersion
Low melting point helps dispersion in compounding.
Especificaciones técnicas
Typical specification. Every shipment is supplied with a batch COA; the limits that apply to your order are confirmed in the quotation and contract.
| Parameter | Typical value |
|---|---|
| Nombre del producto | UV Absorber UV-531 |
| Marca | SUNSORB® 531 |
| CAS No. | 1843-05-6 |
| Nombre químico | 2-Hidroxi-4-n-octiloxibenzofenona |
| Fórmula molecular | C21H26O3 |
| Peso molecular | 326.4 |
| Apariencia | Light-yellow crystalline powder |
| Punto de fusion | 47–49 °C |
| Ensayo | ≥99% |
| Volatile Matter | ≤0,5% |
| Ceniza | ≤0,1% |
Applications by Material
Pick an application to see how 531 is normally used and what to confirm before your trial.
PE Agricultural & Packaging Film
Used with a HALS in greenhouse and mulch film.
What to confirm for your application
- Film thickness and target life
- Agrochemical exposure
- HALS used
Outdoor Polyolefin Parts
UV protection for PP and PE molded parts.
What to confirm for your application
- Part thickness
- Pigment system
- Target weathering life
CLORURO DE POLIVINILO
UV absorber for PVC profiles and sheets.
What to confirm for your application
- Compound type
- Exposure
- Existing stabilizers
embalaje & Storage
embalaje
25 kg net bags or cartons with a PE inner liner. Palletized; private-label packing on request.
Storage
Keep sealed in a cool, seco, ventilated place away from heat and direct sun. See the SDS for full handling details.
plazo de entrega & terms
Typically 3–15 business days from order confirmation, depending on quantity. ENGAÑAR, CIF or DAP to major ports.
Technical & Buying Information
UV Absorber UV-531 Buyer Guide
Define the exposure
Indoor light behind glass, outdoor temperate climate and desert or tropical exposure need very different packages. Note the target service life and the weathering test you use (xenon or QUV, horas, ΔE or gloss retention).
Match absorber to process and thickness
A UV absorber works by filtering, so it needs enough path length: thick parts need less, thin films and fibers need more and need a low-volatility grade. Check the absorber survives your processing temperature.
Combine with a HALS
For outdoor use the standard approach is UV absorber plus HALS. Send your current package and pigment system and we suggest a starting combination for the trial.
Check regulations before you buy
Some benzotriazoles are restricted in the EU and other markets. Tell us the destination and end use, and we confirm the REACH and food-contact position of the grade before you order.
Request a Quotation for UV Absorber UV-531
Start with your material, part thickness, cantidad y destino. Add your current UV package and we will quote against it.
| Information | Example |
|---|---|
| Polímero / Material | PÁGINAS, educación física, abdominales, compuesto, lote maestro |
| Solicitud | Injection molding, extrusión, película, fibra |
| Current additive | Grade or supplier you use today |
| Required specification | Your TDS, COA or key limits |
| Quantity | Trial order / monthly / annual volume |
| embalaje | Standard 25 kg or specific requirement |
| Destination | Country and port |
| Documents needed | COA, Ficha de datos de seguridad (MSDS), ALCANZAR, food-contact statement |
Related UV Absorbers & Estabilizadores
SUNSORB®P
Benzotriazole UV absorber for clear PS, CLORURO DE POLIVINILO, PMMA and polyester.
View product →UV Absorber UV-531 FAQ
531 or a benzotriazole?
531 is economical and compatible in polyolefins; benzotriazoles such as 326 give broader UV coverage. Many outdoor packages use either with a HALS.
What dosage is typical?
0.1–0.5% in most polyolefin applications, higher in thin film. Confirm in your weathering test.
Should I add a HALS?
For outdoor use, Sí. The UV absorber filters light; the HALS stops the radical chain reactions.
Can I get a sample before ordering?
Sí. Tell us the polymer, the test you plan to run and the quantity you need. Samples ship with a COA so you can compare the lot against your current material.
What if a COA does not match our agreed specification?
Send us the agreed specification and the COA showing the difference (parameter, unit and test method). We check it with the production batch record before you accept the material, and replace or re-test where the lot is out of specification.
Discuss Your UV Absorber UV-531 Requirements
Send your application, specification and quantity to request a quotation or supporting documents.