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- Refrigerants
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- Refrigerants
- Second-generation
- Third-generation
- Blended refrigerant
- Fourth-generation
- UV Series
- UV absorber
- Light stabilizers
- Melanin



Shandong Do Sender Chemicals Co.,Ltd.
- Refrigerants
- Second-generation
- Third-generation
- Blended refrigerant
- Fourth-generation
- UV Series
- UV absorber
- Light stabilizers
- Melanin
- …
- Refrigerants
- Second-generation
- Third-generation
- Blended refrigerant
- Fourth-generation
- UV Series
- UV absorber
- Light stabilizers
- Melanin

Product Overview: UV-123 (CAS 129757-67-1)
UV-123 is a NOR® (N-alkoxy) hindered amine light stabilizer (HALS) with low basicity. It is chemically bis(1-octyloxy-2,2,6,6-tetramethyl-4-piperidyl) sebacate, typically supplied as a slightly yellow to yellow viscous liquid . Unlike conventional HALS, the NOR functional group significantly reduces basicity and interaction with acidic components, making it ideal for coatings containing acid catalysts and for agricultural films with pesticide residues . UV-123 effectively protects polymers from gloss reduction, cracking, blistering, and delamination
Property Typical Value
Appearance Slightly yellow to yellow viscous liquid
Purity Monomer ≥65%, Oligomer ≥20% (by LC)
Molecular Weight 737.15 g/mol
Specific Gravity (20°C)~0.97 g/cm³
Dynamic Viscosity (20°C) 2900–3100 mPa·s
Solubility in Water (20°C) <0.01%
Volatiles ≤1.0%
Solubility & Compatibility Profile
Solvent Solubility
Water <0.01
Acetone >50
Ethanol 12
Butyl Acetate >50
n-Hexane >50
Xylene >50
Performance Advantages
Low Basicity (NOR® HALS): Minimal interaction with acidic components (catalyst residues, pesticides, acids).
Excellent Crack Resistance: Prevents gloss loss, cracking, blistering, and delamination in coatings .
Broad Solubility: Soluble >50 g/100g in acetone, butyl acetate, hexane, xylene, and other organic solvents .
Synergistic: Works effectively with UV absorbers (e.g., benzotriazoles) to significantly improve weathering performance.
Polymer Compatibility: Suitable for acrylics, polyurethanes, PVC, PVB, polyolefins (PP, PE, TPO), and adhesives
Applications & End-uses
UV-123 is a versatile light stabilizer for demanding applications where acidic environments or catalyst residues are present
Automotive OEM & Refinish Coatings
Industrial Coatings (Coil, Can, Wood)
Acid-catalyzed coatings
Agricultural films (PE/PP with pesticides)
Polyurethane adhesives & sealants
PVC & PVB plastisols
TPO/TPE automotive parts
Polypropylene (PP) & HDPE
Polystyrene & ABS
Decorative paints & wood stains
Automotive & Industrial Coatings
UV-123 is especially recommended for high-performance industrial coatings and automotive clearcoats where catalyst residues (acid) are present. It effectively prevents gloss loss, cracking, and delamination during accelerated weathering Studies show that 0.3-0.5% UV-123 in clearcoats retains >90% gloss after 2,000 hours QUV exposure
Agricultural Films
The NOR functionality makes UV-123 uniquely suitable for agricultural films treated with sulfur-containing pesticides, which would deactivate conventional HALS. It extends film life by 2-3× in aggressive chemical environments
Standard Packaging
20 kg fiber drum with inner PE liner .
25 kg cardboard box (custom packaging available) .
500 kg big bag (upon request) .
Storage Conditions
Store in original sealed container in a cool, dry, well-ventilated area .
Keep away from direct sunlight, heat sources, and oxidizing agents .
Shelf life: Minimum 36 months from manufacture date when stored properly .
Frequently Asked Questions (FAQ)
Q: What is the exact chemical name of UV-123 (CAS 129757-67-1)?
Q: What is the molecular formula and molecular weight of UV-123?
Q:What is the physical state of UV-123 at room temperature?
Q: What is the EINECS/EC number for CAS 57834-33-0?
Q:Is UV-1 soluble in water?
Q:What solvents is UV-1 soluble in?
Q:What is the boiling point of UV-1?
Q:Is UV-1 compatible with isocyanates?
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Sales Office Address:No. 66, Zhongrun Avenue, Zhangdian District, Zibo City, Shandong Province,China.
Manufacture Facility: Fine Chemical Industry Park, Zhangdian District, Zibo City, Shandong Province,China.