Basic Info:

  • Chemical Synonym(s): Light Stabilizer Tinuvin 622; 2-(4-methoxy-2,2,6,6-tetramethylpiperidin-1-yl)ethyl 4-oxopentanoate;
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  • CAS Number: 65447-77-0
  • Chemical Formula:



Melting Point
>350 °C(lit.)
428 °F
Storage temp.
Sealed in dry,Room Temperature
H2O: 1.6 ppm at 20 °C
Water Solubility
1.6 ppm at 20 ºC
CAS DataBase Reference
65447-77-0(CAS DataBase Reference)
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Our Advantages:

China currently plays a very important role in the world market for plastic additives, with 168, 1010, DSTDP, DLTDP, 977 and 365 being the most produced products in the world.

The price of plastic additives varies significantly with oil, while the cost correlation between antioxidants and palm oil is high. Since 2020, the number of black swan events in the world has increased, resulting in dramatic changes in raw material prices.

Companies such as UPP, SONGWON, PMC, LG, etc. have been alerted by us in time and have avoided many losses.

We have a 20+ year track record of working with suppliers in China and rating reports on them, and we keep our suppliers updated with the latest news so our customers can get the latest supplier reports. We know the market well and have early warning notifications on upstream raw material prices to help you build a stable supply chain.

When selecting suppliers, our procurement specialists will audit the qualification of suppliers, conduct thorough investigations such as field visits and sample testing, and make ratings to ensure the authenticity and legality of supplier information.

We have a long-term stable cooperation with GLP laboratories, encounter customer test results and supplier test results do not match the situation, we will commission a third party to test to ensure the accuracy, authenticity and reliability of the experimental results. In this way, we can effectively control the product quality problems.

We have a long-term cooperative warehouse and can follow up packaging and labeling according to safety regulations and customer requirements. In order to effectively prevent damage to the goods in transit, we have prepared various reinforcement measures and packaging solutions.

We have a number of international freight companies with whom we have long-standing cooperation, and we can choose several route options according to the customer's requirements. For more difficult or urgent orders, we will prepare several alternative solutions to ensure safe and timely delivery.


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SUNLIGHT® 622, also known as butanedioic acid and (4-hydroxy-2,2,6,6-tetramethyl-1-piperidinyl polymer), is a chemical.

It is a polymeric high molecular weight hindered amine light stabilizer, it is a zwitterionic compound with good processing heat stability and good compatibility with various resins, and because it is a high molecular weight compound, it has good resistance to water extraction, so it is not easy to lose during processing or use with good resistance to water extraction.

It has the appearance of a white or light yellow granular solid.

It is non-toxic, non-flammable, non-explosive, non-corrosive, and has good storage stability. The product can effectively prevent the polymer's degradation effect of light, heat, climate, and moisture.


The broad application of Light Stabilizer 622 is widely used in various areas of industry, mainly in the field of the food industry, photographic industry, textile industry, plastic industry, etc.

it is mainly used for afterglow control of dyes, for improving the dye light fastness, and for lightfastness improvement of dyestuffs. It is to prevent or delay photosensitive materials or ultraviolet radiation on the photosensitive material during processing and storage and to prolong the life of photographic images.

It is widely used in photographic and cinematographic papers, plates and films, and printing materials and cosmetics. It is a hindered phenol antioxidant with a sulfonic acid group.

It can be used as a light stabilizer for Olefin, Epoxide, Acrylate, Acrylic, Polyester Resin, Polyurethane, PVA, Nylon, PET and other materials.

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