Description

Tris(Tetramethylhydroxypiperidinol) Citrate is a high-performance, hindered amine-based compound that functions as a highly effective light stabilizer and antioxidant. This synergistic molecule is critical for protecting polymers and coatings from degradation caused by UV radiation and thermal oxidation, thereby extending product lifespan and maintaining aesthetic properties. It is an essential additive for manufacturers in the plastics, coatings, and specialty chemical industries seeking to enhance the durability and performance of their formulations.

Application

• Primary use as a light stabilizer (HALS - Hindered Amine Light Stabilizer) in polyolefins such as polypropylene (PP) and polyethylene (PE).
• Critical additive in automotive coatings and plastics to prevent color fading, gloss loss, and surface cracking.
• Stabilizer for agricultural films and greenhouse covers to ensure long-term UV resistance and mechanical integrity.
• Protective agent in engineering plastics (e.g., polyamide, ABS) used in outdoor applications and consumer electronics.
• Enhancement of weatherability in industrial and architectural coatings, including powder coatings.
• Stabilization of synthetic fibers and textiles against photodegradation.
• Component in masterbatch and compound formulations for consistent and efficient dispersion.

Basic Information

Product Name	Tris(Tetramethylhydroxypiperidinol) Citrate
CAS No.	220410-74-2
Molecular Formula	C39H69N3O12
Molecular Weight	771.98 g/mol
Synonyms	1,2,2,6,6-Pentamethyl-4-piperidinol citrate (3:1); Tris(1,2,2,6,6-pentamethyl-4-piperidyl) citrate; Tinuvin 477; Light Stabilizer 477; HALS 477; UV-477; Tris(N-methyl-2,2,6,6-tetramethyl-4-hydroxypiperidine) citrate; 3:1 Citrate salt of 1,2,2,6,6-pentamethyl-4-piperidinol
EINECS	Contact for details

Quality Control

Our production of Tris(Tetramethylhydroxypiperidinol) Citrate adheres to stringent quality management systems to ensure batch-to-batch consistency and high performance. Every lot is tested against rigorous internal specifications, which typically include assay, identification, and impurity profile analysis. Certificates of Analysis (COA) documenting purity and key physical-chemical parameters are available upon request to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). This material is light-sensitive (store away from light) and easily oxidized (store under inert atmosphere). Keep away from strong heat, ignition sources, and incompatible materials. For long-term storage, consider using an inert gas blanket (e.g., nitrogen) to minimize oxidation.

Specification

Item	Specification
Appearance	White to off-white powder or crystalline solid
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	≥ 98.0%
Melting Point	Contact for details
Loss on Drying	≤ 0.5%
Ash Content	≤ 0.1%
Transmittance	Contact for details

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.