What is bis(1-octyloxy-2,2,6,6-tetramethyl-4-piperidyl) sebacate (NOR-HALS) and how does it compare across HALS grades?
Bis(1-octyloxy-2,2,6,6-tetramethyl-4-piperidyl) sebacate (CAS 129757-67-1) is an N-alkoxy NOR-HALS hindered-amine light stabilizer. Its N-OR substitution gives lower basicity than conventional secondary- or tertiary-amine HALS, improving compatibility with acid-cure coatings, agrochemical exposure and flame-retarded systems where basic HALS can be neutralized. Bulk quantities are sourced to specification.
- ▸ Acid- and thermally stable light stabilization for automotive, industrial and wood coatings
- ▸ Weathering protection in waterborne and high-solids coating systems
- ▸ Light stabilization of PU, PS, ABS, PE/PP/TPO and polyester articles
| Grade | Structure class | CAS No. | Mol. wt (g/mol) |
|---|---|---|---|
| Bis(2,2,6,6-tetramethyl-4-piperidyl) Sebacate | Monomeric | 52829-07-9 | 480.7 |
| Bis(1,2,2,6,6-pentamethyl-4-piperidinyl) Sebacate | Monomeric (liquid) | 41556-26-7 | 508.8 |
| Bis-piperidinyl isophthalamide | Monomeric | 42774-15-2 | 442.6 |
| Monomeric C16-18 piperidinyl ester | Monomeric | 167078-06-0 | — |
| Bis(1-octyloxy-2,2,6,6-tetramethyl-4-piperidyl) Sebacate you are here | Monomeric (NOR) | 129757-67-1 | — |
| Oligomeric Triazine Hindered Amine Light Stabilizer | Oligomeric | 192268-64-7 | 684.1 |
| Oligomeric triazine-piperidine | Oligomeric | 106990-43-6 | 2285.6 |
| Dimethyl Succinate / 4-Hydroxy-2,2,6,6-tetramethyl-1-piperidineethanol Polymer | Polymeric | 65447-77-0 | — |
| Polymeric Triazine-Hexanediamine Hindered Amine Light Stabilizer, tert-Octylamino Type | Polymeric | 70624-18-9 | — |
How to choose: HALS are 2,2,6,6-tetramethylpiperidine radical scavengers that regenerate to protect polymers and coatings from UV and thermal oxidation. They are grouped by molecular weight and structure, which sets mobility versus permanence: monomeric grades diffuse quickly for fast protection but migrate and extract more readily; oligomeric and polymeric grades resist volatilization and extraction for long-term durability in thick sections and demanding outdoor exposure. The N-alkoxy NOR-HALS grade carries lower basicity, improving compatibility with acid-cure coatings and flame-retarded or agrochemical-exposed systems where basic HALS can be neutralized.
Plastics & polymers solutions · Coatings solutions · Browse all products
A grade-specific Safety Data Sheet (SDS) — with the complete hazard classification, handling precautions, and transport information — is supplied with every shipment and available on request. Confirm all safety and regulatory details against the SDS for your specific grade.
Request SDS →
Bis(1-octyloxy-2,2,6,6-tetramethyl-4-piperidyl) sebacate is a NOR-HALS (N-alkoxy, low-basicity) light stabilizer — a hindered amine that keeps working in acidic environments where standard basic HALS are deactivated. Identity: CAS 129757-67-1.
What it is
This light stabilizer (CAS 129757-67-1) is a liquid N-alkoxy (N–OR) hindered amine. The N-alkoxy group makes it far less basic than conventional N–H HALS, so it tolerates acids, acid-catalyzed cure chemistries and acidic co-additives.
How it protects against UV
It scavenges UV-generated radicals through the same regenerated nitroxyl cycle as other HALS, but its low basicity means it is not neutralized by acids — making it the choice for acid-catalyzed coatings, flame-retarded compounds and agrochemical (pesticide) exposure.
Applications
This NOR-HALS is used in acid-catalyzed automotive and industrial coatings, waterborne coatings, and acidic or flame-retarded plastics, with a UV absorber. Standard (basic) alternatives for non-acidic systems: bis(1,2,2,6,6-pentamethyl-4-piperidyl) sebacate and bis(2,2,6,6-tetramethyl-4-piperidyl) sebacate.
Forms, grades and handling
This NOR-HALS is supplied as a clear-to-amber liquid in drums, IBCs and bulk. Properties are typical reference values; the Certificate of Analysis (CoA) for the lot you buy governs. Handle per the current Safety Data Sheet (SDS); each lot ships with CoA, TDS and SDS.
Bulk supply and RFQ
RawSource sources this NOR-HALS direct from producers in bulk, with CoA, TDS and SDS per lot. Tell us your polymer, part thickness and service life, the chemical environment (acidic, flame-retarded, agrochemical), and whether you need a complete UV-absorber-plus-HALS package, and we will quote it. See the full range and selection logic in the HALS guide.
Typical Properties
Typical reference values, not a specification; the Certificate of Analysis (CoA) for the lot governs.
| Property | Typical Value |
|---|---|
| Chemical / class | Hindered amine light stabilizer (NOR-HALS, low-basicity) |
| HALS type | NOR-HALS (low-basicity) |
| Permanence | Liquid; acid-tolerant |
| CAS Number | 129757-67-1 |
| Handling | Refer to the current SDS |
Regulatory & registration requirements
- TSCA (US):
- REACH (EU):
- EC number: 406-750-9
TSCA Inventory flag PMN: a commenced PMN (premanufacture notice) substance (EPA flag legend).
Source: EPA TSCA Inventory (July 2025 release) · ECHA CHEM — retrieved 2026-07-12
Frequently Asked Questions
What is bis(1-octyloxy-2,2,6,6-tetramethyl-4-piperidyl) sebacate used for?
Bis(1-octyloxy-2,2,6,6-tetramethyl-4-piperidyl) sebacate (CAS 129757-67-1) is a NOR-HALS (N-alkoxy, low-basicity) hindered amine light stabilizer used in acid-catalyzed coatings, waterborne coatings, and acidic or flame-retarded plastics where standard basic HALS lose efficiency.
What is NOR-HALS?
NOR-HALS are hindered amine light stabilizers with an N-alkoxy (N-OR) group instead of N-H. This makes them much less basic, so they keep stabilizing in acidic environments, acid-catalyzed coatings, flame-retarded compounds and pesticide exposure.
How is bulk bis(1-octyloxy-2,2,6,6-tetramethyl-4-piperidyl) sebacate supplied and quoted?
RawSource supplies it in bulk with CoA, TDS and SDS per lot. Pricing is quote-based on grade and volume; submit an RFQ with your polymer, service life and environment.
What is the REACH and TSCA regulatory status of Bis(1-octyloxy-2,2,6,6-tetramethyl-4-piperidyl) Sebacate?
Bis(1-octyloxy-2,2,6,6-tetramethyl-4-piperidyl) Sebacate (CAS 129757-67-1) is subject to U.S. TSCA Inventory requirements; supplying it into the EU requires valid REACH registration ((EC) No 1907/2006). RawSource cannot verify a third-party supplier's registrations — buyers should require documented TSCA and REACH compliance for their jurisdiction and volume (EC 406-750-9).