Shandong Huashang Chemical Co., Ltd. is a high-tech enterprise specializing in the research and development, manufacturing, and sales of fine chemicals. Headquartered in Jinan, Shandong, China, we are committed to delivering high-quality products to our global partners. Currently, over 90% of our products are exported to developed markets, including North America, Europe, Japan, South Korea, and the Middle East.
Basic Information
Product Name: Poly(4-hydroxy-2,2,6,6-tetramethyl-1-piperidine ethanol-alt-1,4-butanedioic acid)
Alias: Tinuvin 622; HALS 622; Light Stabilizer BW-10LD; Butanedioic acid, dimethyl ester, polymer with 4-hydroxy-2,2,6,6-tetramethyl-1-piperidineethanol
CAS No: 65447-77-0
Molecular Formula: (C??H??NO?)? (repeating unit)
Molecular Weight: 347.45 (repeating unit); Mn ≈ 5,000–7,000 (polymer)
Classification: Hindered Amine Light Stabilizer (HALS); Polymer additive; UV stabilizer
Physical & Chemical Properties
Appearance: White or off-white granular/powder
Melting Point: ~60–70 °C
Solubility: Insoluble in water; soluble in organic solvents (toluene, xylene, chloroform)
Stability: Excellent UV resistance; thermal stability up to 280 °C; resistant to hydrolysis and migration
Refractive Index: ~1.45–1.50
Specification Table
| Item | Specification | Unit | Remarks |
| Product Name | Poly(4-hydroxy-2,2,6,6-tetramethyl-1-piperidine ethanol-alt-1,4-butanedioic acid) | — | HALS 622 / Tinuvin 622 |
| CAS No | 65447-77-0 | — | Polymer grade |
| Appearance | White granular powder | — | Free-flowing |
| Molecular Formula | (C??H??NO?)? | — | Repeating unit |
| Molecular Weight (Mn) | 5,000–7,000 | g/mol | GPC |
| Purity | ≥95.0 | % | — |
| Melting Point | 60–70 | °C | — |
| Volatile Matter | ≤0.5 | % | 105 °C, 2 h |
| Ash Content | ≤0.1 | % | — |
Main Uses
- Polymer UV Stabilizer: For PE, PP, PVC, PS, ABS, PC, polyurethane, coatings, adhesives.
- Light Stabilization Mechanism: Hindered amine (piperidine) scavenges free radicals, inhibits photo-oxidation, extends material service life outdoors.
- Applications: Agricultural films, outdoor furniture, automotive parts, construction materials, plastic pipes, coatings.
- Advantages: Low volatility, good compatibility, resistance to migration, excellent weatherability, synergistic with antioxidants.
Safety & Storage
GHS Classification: GHS07 (Warning)
Hazard Statements: H302 (Harmful if swallowed), H315 (Causes skin irritation), H319 (Causes serious eye irritation), H335 (May cause respiratory irritation)
Storage: Sealed, cool, dry place; avoid moisture and direct sunlight
Shelf Life: 24 months (proper storage)
