Built for nylon
Excellent compatibility with PA6 and PA66, including glass-filled compounds.
SUNNOX® 1098
Antioxidant 1098 Supplier for Polyamides
SUNNOX® 1098 is an amide-type hindered phenolic antioxidant designed for polyamides. It protects PA6, PA66 and fiber against thermal oxidation during processing and long service, with good color retention.
CAS 23128-74-7 · Hindered phenol · Amide type
- Lot COA with every shipment
- Samples for your trials
- Reply within 1 business day
Product overview & key benefits
The amide groups in 1098 make it highly compatible with polyamides, so it stays dispersed and resists blooming. It is the standard phenolic for nylon compounds, fiber and engineering plastics, and is also used in POM, PU and adhesives. A phosphite such as 168 is often added for processing color.
Color retention
Limits yellowing during compounding and in heat-aged parts.
Fiber grade use
Used in polyamide fiber and filament where extraction and color matter.
Technical specifications
| Parameter | Typical value |
|---|---|
| Product Name | Antioxidant 1098 |
| Brand | SUNNOX® 1098 |
| CAS No. | 23128-74-7 |
| Chemical Name | N,N'-Hexane-1,6-diylbis[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionamide] |
| Molecular Formula | C40H64N2O4 |
| Molecular Weight | 636.9 |
| Appearance | White powder |
| Melting Point | 156–161 °C |
| Assay | ≥98.0% |
| 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 1098 is normally used and what to confirm before your trial.
Polyamide Compounds
The main use. Typically 0.1–0.5% in PA6 and PA66, including glass-filled grades, often with 168 for processing color.
Check before trial
- PA type and filler content
- Heat-aging requirement
- Color target after molding
Polyamide Fiber & Filament
Added in polymerization or melt spinning to protect fiber color and strength.
Check before trial
- Polymerization or melt addition
- Spinning temperature
- Dyeing requirements
POM, Polyurethane & Adhesives
Also used in POM, PU and adhesives where amide compatibility helps.
Check before trial
- System type
- Processing temperature
- Existing stabilizers
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® 1098 | Hindered phenol · amide | 636.9 | 156–161 °C | Polyamide and fiber stabilization | 0.1–0.5% |
| SUNNOX® 1010 | Hindered phenol · primary | 1177.6 | 110–125 °C | Long-term thermal 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® 245 | Hindered phenol · primary | 586.8 | 76–79 °C | Styrenics, POM, PA, PU | 0.1–0.3% |
| SUNNOX® 9228 | Diphosphite · secondary | 853.0 | ≥225 °C | High-temperature processing, hydrolysis resistance | 0.05–0.2% with a phenolic |
*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® 168
Hydrolysis-resistant phosphite secondary antioxidant for color and melt-flow protection during processing.
View product →SUNNOX® 245
Phenolic antioxidant favored for HIPS, ABS, POM and PA, with good color retention.
View product →SUNNOX® 9228
High-performance diphosphite for high-temperature processing with excellent hydrolysis resistance.
View product →Antioxidant 1098 FAQ
Why use 1098 instead of 1010 in nylon?
1098's amide groups make it more compatible with polyamide, so it disperses better and blooms less. 1010 is preferred in polyolefins.
What dosage is typical in PA66?
0.1–0.5% depending on the heat-aging target, often with a phosphite for processing color. Confirm in your trial.
Can it be added during polymerization?
Yes, it is often added during polymerization or melt spinning of polyamide fiber. Tell us your process and we confirm the form and handling.
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.