Non-basic
Does not interfere with acid catalysts.
SUNLIGHT® 123
HALS 123 Non-basic Light Stabilizer Supplier for Coatings
SUNLIGHT® 123 is a liquid, non-basic NOR-type hindered amine light stabilizer. It is the HALS of choice for acid-catalyzed coatings and systems where basic HALS would interfere.
CAS 129757-67-1 · NOR HALS · Liquid
- Lot COA with every shipment
- Samples for your trials
- Technical support for your trial
Product overview & key benefits
HALS 123 (bis(1-octyloxy-2,2,6,6-tetramethyl-4-piperidyl) sebacate) carries an alkoxy group on the hindered nitrogen, which makes it essentially non-basic. It does not interfere with acid catalysts or acidic components, so it is used in acid-cure automotive and industrial coatings, often with a UV absorber.
Coating durability
Prevents cracking and gloss loss.
Liquid format
Easy incorporation.
Technical specifications
| Parameter | Typical value |
|---|---|
| Product Name | Light Stabilizer 123 |
| Brand | SUNLIGHT® 123 |
| CAS No. | 129757-67-1 |
| Chemical Name | Bis(1-octyloxy-2,2,6,6-tetramethyl-4-piperidyl) sebacate |
| Appearance | Light-yellow liquid |
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 Material
Pick an application to see how 123 is normally used and what to confirm before your trial.
Acid-catalyzed Coatings
Typically 0.5–2% on binder solids with a UV absorber.
Check before trial
- Catalyst type
- Cure schedule
- Durability target
Automotive Coatings
Used in automotive clear coats and refinish.
Check before trial
- Clear coat type
- Bake conditions
- UV absorber used
Other Sensitive Systems
For systems with acidic components where basic HALS would interact.
Check before trial
- System type
- Acidic components
- Exposure
Selection & comparison
Selecting a Light Stabilizer
| Your requirement | What usually works |
|---|---|
| Thick PP and PE parts | Low-MW HALS (770) for fast migration to the surface |
| Thin films, tapes and fibers | Polymeric HALS (944, 622) for low volatility and extraction resistance |
| Agricultural film exposed to pesticides | Polymeric HALS with good resistance to acidic residues; ask about the specific chemicals |
| Automotive and industrial coatings | Liquid HALS (292) with a UV absorber |
| Acid-catalyzed coatings | Non-basic NOR-type HALS (123) |
| Long outdoor life | HALS plus UV absorber, often a blend of a low-MW and a polymeric HALS |
| Replacing an existing grade | Send your current TDS or COA; we match on the parameters you approve |
Light Stabilizer Comparison
Swipe or scroll horizontally to see all columns →
| Product | Type | Mol. weight | Form | Best fit | Typical starting level* |
|---|---|---|---|---|---|
| SUNLIGHT® 123 | NOR HALS, liquid | — | Light-yellow liquid | Acid-catalyzed coatings | 0.5–2% on binder solids |
| SUNLIGHT® 292 | Liquid HALS | — | Light-yellow liquid | Coatings | 0.5–2% on binder solids |
| SUNSORB® 400 | Hydroxyphenyl-triazine, liquid | — | Liquid | Automotive and industrial coatings | 1–3% on binder solids |
| SUNSORB® 384-2 | Benzotriazole, liquid | — | Liquid | Coatings | 1–3% on binder solids |
| SUNSORB® 1130 | Benzotriazole, liquid | — | Liquid | Coatings | 1–3% on binder solids |
*Starting points for trials, not fixed recommendations. The right level depends on part thickness, pigments, fillers, agrochemical exposure and target service life. Combining a HALS with a UV absorber is usual for outdoor use.
Packaging & storage
Packaging
Typically 25 kg pails or 200 kg drums; IBC on request. Confirm the pack in the quotation.
Storage
Keep containers closed, away from heat and direct sun. Warm gently and mix before use if the liquid has thickened in cold weather. See the SDS.
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
Define the exposure
Note the climate, the expected service life and your weathering test (xenon or QUV hours, retained elongation, gloss or ΔE). For agricultural film, list the pesticides and fumigants the film will meet.
Pick molecular weight for the part
Low-MW HALS move to the surface quickly and suit thick parts; polymeric HALS resist loss from thin films and fibers. Many outdoor packages blend both.
Check interactions
HALS are basic and can interact with acidic additives, halogenated flame retardants, some pigments and sulfur-containing antioxidants. Send your full formulation so we can flag conflicts before the trial.
Lock in supply terms
Agree physical form (powder or granule), packaging, monthly volume and documents up front. A matching CAS number alone does not qualify a new source; run your weathering test and keep the approved lot COA as the reference.
Tell us your requirement. We match the grade.
Start with your material, part thickness, quantity and destination. Add your current stabilizer package 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
SUNSORB® 400
Hydroxyphenyl-triazine liquid UV absorber for durable automotive and industrial coatings.
View product →SUNSORB® 1130
Liquid benzotriazole UV absorber for coatings, often paired with liquid HALS.
View product →Light Stabilizer 123 FAQ
123 or 292?
Use 123 in acid-catalyzed or acidic systems; 292 is the general-purpose liquid HALS for other coatings.
What dosage is typical?
0.5–2% on binder solids with a UV absorber.
Is it compatible with waterborne coatings?
It is used in a range of systems; check incorporation with your formulation.
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.
