Three phenolic groups
Efficient radical scavenging per unit weight.
SUNNOX® CA
Antioxidant CA Supplier
SUNNOX® CA is a trisphenolic primary antioxidant with low volatility and good resistance to extraction. It protects polyolefins, wire and cable insulation, ABS, PVC, polyamide and rubber against long-term thermal oxidation.
CAS 1843-03-4 · Trisphenol · Primary antioxidant
- Lot COA with every shipment
- Samples for your trials
- Technical support for your trial
Product overview & key benefits
Antioxidant CA (1,1,3-tris(2-methyl-4-hydroxy-5-tert-butylphenyl)butane) carries three hindered-phenol groups in one molecule, so it is efficient per unit weight and stays in the polymer at processing temperatures. It is used in PP and PE, wire and cable compounds, ABS, PVC, PA, hot-melt adhesives and rubber, and is normally combined with a phosphite such as 168 for processing stability.
Low volatility and extraction
Stays in the part at high processing temperatures and in contact with water.
Wire and cable use
Widely used in polyolefin insulation and jacketing compounds.
Technical specifications
| Parameter | Typical value |
|---|---|
| Product Name | Antioxidant CA |
| Brand | SUNNOX® CA |
| CAS No. | 1843-03-4 |
| Chemical Name | 1,1,3-Tris(2-methyl-4-hydroxy-5-tert-butylphenyl)butane |
| Molecular Formula | C37H52O3 |
| Molecular Weight | 544.8 |
| Appearance | White powder |
| Melting Point | 185–190 °C |
| Volatile Matter | ≤0.5% |
| Ash | ≤0.1% |
Typical specification. Every shipment is supplied with a batch COA; the limits that apply to your order are confirmed in the quotation and contract.
Applications by Polymer
Pick an application to see how CA is normally used and what to confirm before your trial.
Polyolefins
Long-term thermal protection in PP and PE, typically 0.05–0.3% with a phosphite.
Check before trial
- Resin grade and process (film, fiber, molding, pipe)
- Processing temperature and number of passes
- Current antioxidant package and dosage
Wire & Cable Compounds
Used in polyolefin insulation and jacketing; ask about a metal deactivator if the compound contacts copper.
Check before trial
- Cable standard and aging test
- Copper contact
- Current antioxidant package
ABS, PVC, Polyamide & Rubber
Antioxidant for engineering plastics, PVC, hot-melts and rubber.
Check before trial
- Polymer type
- Processing temperature
- Color requirement
Selection & comparison
Selecting an Antioxidant System
| Your requirement | What usually works |
|---|---|
| Color and melt-flow stability during extrusion or molding | Phosphite secondary antioxidant (168) with a phenolic primary |
| Long-term heat aging in service | High-MW phenolic primary (1010), often with a thioester (DLTDP / DSTDP) |
| Thin film, fiber, low-melting compounding | Lower-melting phenolic (1076) for easy dispersion |
| Repeated processing / recycled content | Raise the phosphite share in the blend and check yellowing after each pass |
| Humid storage or long transit | Hydrolysis-resistant phosphite such as 168; keep bags sealed |
| Food-contact articles | Ask for the grade-specific food-contact statement before trials |
| Replacing an existing grade | Send your current TDS or COA; we match on the parameters you approve |
Antioxidant Comparison
Swipe or scroll horizontally to see all columns →
| Product | Type | Mol. weight | Melting point | Main job | Typical starting level* |
|---|---|---|---|---|---|
| SUNNOX® CA | Trisphenol · primary | 544.8 | 185–190 °C | Low-volatility long-term protection | 0.05–0.3% |
| SUNNOX® 1010 | Hindered phenol · primary | 1177.6 | 110–125 °C | Long-term thermal protection | 0.05–0.3% |
| SUNNOX® 330 | Hindered phenol · primary | 775.2 | 240–245 °C | High-temperature, low-volatility protection | 0.05–0.3% |
| SUNNOX® 168 | Phosphite · secondary | 646.9 | 183–187 °C | Processing stability, color | 0.05–0.2% with a phenolic |
| SUNNOX® 3114 | Hindered phenol · isocyanurate | 784.1 | 218–223 °C | Low-extraction long-term protection | 0.05–0.3% |
*Starting points for trials, not fixed recommendations. The right level depends on resin, catalyst residue, processing temperature and service life. Primary and secondary antioxidants do different jobs and are not interchangeable.
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.
From first email to approved supply
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.
Tell us your requirement. We match the grade.
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 products
SUNNOX® 1010
High-MW hindered phenolic primary antioxidant for long-term thermal protection with low volatility.
View product →SUNNOX® 330
High-melting phenolic antioxidant with very low volatility for high-temperature polyolefin and engineering-plastic use.
View product →SUNNOX® 168
Hydrolysis-resistant phosphite secondary antioxidant for color and melt-flow protection during processing.
View product →SUNNOX® 3114
Isocyanurate phenolic antioxidant with low extraction, used in polyolefin fiber, film and pipe.
View product →Antioxidant CA FAQ
CA or 1010?
Both are high-performance phenolics. CA is often chosen in wire and cable and where extraction resistance matters; 1010 is the general standard in polyolefins. Send your current grade and we match it.
What dosage is typical?
0.05–0.3% in polyolefins, usually with a phosphite. Confirm in your heat-aging test.
Is CA suitable for cable in contact with copper?
Copper accelerates oxidation; cable compounds in contact with copper usually also need a metal deactivator. Tell us the construction and we suggest a package.
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.
