Very low volatility
High melting point and molecular weight keep it in the polymer during hot processing.
Antioxidant 330 Supplier for High-Temperature Applications
SUNNOX® 330 is a high-melting, high-molecular-weight hindered phenolic antioxidant. Its very low volatility and extraction suit polyolefin pipe, wire and cable, and engineering plastics processed at high temperature.
CAS 1709-70-2 · Hindered phenol · Primary antioxidant
Product Overview
Antioxidant 330 (1,3,5-trimethyl-2,4,6-tris(3,5-di-tert-butyl-4-hydroxybenzyl)benzene) melts at 240–245 °C and has a molecular weight of 775.2, so it stays in the polymer at high processing temperatures and resists extraction by water. It is used in PE pipe, PP, wire and cable insulation, PA and PET.
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
Extraction resistance
Suited to pipe and parts in contact with hot water.
Non-discoloring
Good color retention in finished parts.
Technical Specifications
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 |
|---|---|
| Product Name | Antioxidant 330 |
| Brand | SUNNOX® 330 |
| CAS No. | 1709-70-2 |
| Chemical Name | 1,3,5-Trimethyl-2,4,6-tris(3,5-di-tert-butyl-4-hydroxybenzyl)benzene |
| Molecular Formula | C54H78O3 |
| Molecular Weight | 775.2 |
| Appearance | White powder |
| Melting Point | 240–245 °C |
| Assay | ≥98% |
| Volatile Matter | ≤0.5% |
Applications by Polymer
Pick an application to see how 330 is normally used and what to confirm before your trial.
PE Pipe, Wire & Cable
Long-term protection in PE pipe and cable insulation where extraction resistance matters.
What to confirm for your application
- Pipe class or cable standard
- Service temperature and water contact
- Current antioxidant package
Polyolefins
High-temperature processing of PP and PE compounds.
What to confirm for your application
- Resin grade and process (film, fiber, molding, pipe)
- Processing temperature and number of passes
- Current antioxidant package and dosage
PA, PET & Engineering Plastics
Used where processing temperatures exceed what lower-melting phenolics tolerate.
What to confirm for your application
- Polymer type
- Processing temperature
- Heat-aging requirement
Packaging & Storage
Packaging
25 kg net bags or cartons with a PE inner liner. Palletized; private-label packing on request.
Storage
Keep sealed in a cool, dry, ventilated place away from heat and direct sun. See the SDS for full handling details.
Lead time & terms
Typically 3–15 business days from order confirmation, depending on quantity. FOB, CIF or DAP to major ports.
Technical & Buying Information
Antioxidant 330 Buyer Guide
Name the failure you want to prevent
Yellowing or melt-flow change during processing points to the phosphite share; embrittlement or cracking after months in service points to the phenolic and thioester share. Note recycled content and the number of extrusion passes.
Start from a proven blend
Most polyolefin packages start from a phenolic primary plus a phosphite secondary, then adjust. Send your current package and we suggest a starting blend for the trial instead of changing several variables at once.
Compare the numbers that matter
For powders: assay, melting range, volatiles and light transmittance at 425/500 nm (a direct read on color). Ask for the same parameters on our COA that appear on your incoming-inspection sheet.
Lock in supply terms
Agree packaging, monthly volume, destination port and required documents up front. A matching CAS number alone does not qualify a new source; run your trial and keep the approved lot COA as the reference.
Request a Quotation for Antioxidant 330
Start with your polymer, quantity and destination. Add your current grade or specification and we will quote against it.
| Information | Example |
|---|---|
| Polymer / Material | PP, PE, ABS, compound, masterbatch |
| Application | Injection molding, extrusion, film, fiber |
| Current additive | Grade or supplier you use today |
| Required specification | Your TDS, COA or key limits |
| Quantity | Trial order / monthly / annual volume |
| Packaging | Standard 25 kg or specific requirement |
| Destination | Country and port |
| Documents needed | COA, SDS, REACH, food-contact statement |
Related Antioxidants
SUNNOX® 1010
High-MW hindered phenolic primary antioxidant for long-term thermal protection with low volatility.
View product →SUNNOX® 3114
Isocyanurate phenolic antioxidant with low extraction, used in polyolefin fiber, film and pipe.
View product →SUNNOX® 168
Hydrolysis-resistant phosphite secondary antioxidant for color and melt-flow protection during processing.
View product →SUNNOX® 9228
High-performance diphosphite for high-temperature processing with excellent hydrolysis resistance.
View product →Antioxidant 330 FAQ
When is 330 better than 1010?
When processing temperature is very high or the part is exposed to hot water and extraction. 1010 remains the general-purpose choice.
What dosage is typical?
0.05–0.3% in most polyolefins, usually with a phosphite. Confirm in your trial.
Does it disperse well given its high melting point?
It does not melt at normal polyolefin processing temperatures, so use a fine powder or a masterbatch and good mixing.
Can I get a sample before ordering?
Yes. 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 Antioxidant 330 Requirements
Send your application, specification and quantity to request a quotation or supporting documents.