Ultraviolet Absorbent UV-P
[CAS# 2440-22-4]

Identification

• Classification: Catalysts and additives >> UV absorber
• Name: Ultraviolet Absorbent UV-P
• Synonyms: 2-(2-Benzotriazolyl)-4-methylphenol; 2-(2-Hydroxy-5-methylphenyl)benzotriazole; 2-(2-Hydroxy-5-methyl-phenyl)benzotriazole; 2-(2H-Benzotriazol-2-yl)-p-cresol; Drometrizole; UV Absorber-1; Benazol P
• Molecular Formula: C₁₃H₁₁N₃O
• Molecular Weight: 225.25
• CAS Registry Number: 2440-22-4
• EC Number: 219-470-5
• SMILES: CC1=CC(=C(C=C1)O)N2N=C3C=CC=CC3=N2

Properties

• Density: 1.3±0.1 g/cm³, Calc.^*, 1.38 g/mL
• Melting point: 125.5-129.5 °C
• Index of Refraction: 1.682, Calc.^*
• Boiling Point: 423.8±55.0 °C (760 mmHg), Calc.^*
• Flash Point: 210.1±31.5 °C, Calc.^*

^* Calculated using Advanced Chemistry Development (ACD/Labs) Software.

Safety Data

• Hazard Symbols: GHS07;GHS09 Warning
• Risk Statements: H317-H410-H413
• Safety Statements: P261-P272-P273-P280-P302+P352-P321-P333+P317-P362+P364-P391-P501

Hazard Classification

Hazard	Class	Category Code	Hazard Statement
Skin sensitization	Skin Sens.	1	H317
Chronic hazardous to the aquatic environment	Aquatic Chronic	4	H413
Chronic hazardous to the aquatic environment	Aquatic Chronic	1	H410
Skin sensitization	Skin Sens.	1B	H317
Chronic hazardous to the aquatic environment	Aquatic Chronic	2	H411
Acute toxicity	Acute Tox.	4	H332
Eye irritation	Eye Irrit.	2	H319
Specific target organ toxicity - repeated exposure	STOT RE	2	H373

Discovery and Applications

Ultraviolet Absorbent UV-P is a synthetic organic compound widely recognized for its effectiveness in absorbing ultraviolet (UV) radiation. This chemical substance plays a crucial role in protecting various materials from the damaging effects of UV light, which can lead to degradation, discoloration, and reduced lifespan. The discovery of UV-P can be traced back to advancements in polymer chemistry and materials science during the late 20th century when the need for UV stabilizers became apparent due to the growing use of plastics and coatings in outdoor applications.

The chemical structure of UV-P typically features multiple aromatic groups that provide strong UV absorption capabilities, particularly in the UV-B and UV-C regions of the electromagnetic spectrum. The compound is often used as a light stabilizer in plastics, coatings, and other materials exposed to sunlight. Its discovery was driven by the increasing demand for durable products that maintain their appearance and performance over time, especially in industries such as automotive, construction, and consumer goods.

One of the primary applications of Ultraviolet Absorbent UV-P is in the plastics industry. It is commonly incorporated into polyolefins, polystyrenes, and polyvinyl chloride (PVC) to enhance their UV resistance. This is particularly important for products like outdoor furniture, automotive parts, and packaging materials, where prolonged exposure to sunlight can cause significant damage. By incorporating UV-P, manufacturers can extend the lifespan of their products, ensuring they retain their mechanical properties and aesthetic qualities.

In addition to plastics, UV-P is also used in coatings and adhesives. Its ability to absorb UV radiation helps protect the underlying substrate from the harmful effects of sunlight, making it ideal for applications in paints, varnishes, and sealants. UV-P contributes to the durability of these coatings, preventing yellowing and degradation, which can compromise the appearance and effectiveness of protective finishes.

Furthermore, UV-P has applications in the textile industry, where it is used to enhance the UV resistance of fabrics. Textiles treated with UV-P are particularly valuable for outdoor use, such as in awnings, umbrellas, and clothing designed for sun protection. The compound helps reduce the risk of color fading and material breakdown, contributing to the longevity of these products.

Despite its many advantages, the use of Ultraviolet Absorbent UV-P requires careful consideration of safety and environmental factors. While the compound is generally regarded as safe for use in various applications, ongoing research aims to evaluate its long-term effects on health and the environment. Manufacturers are encouraged to adhere to regulations regarding the use of UV stabilizers and to seek alternatives that may offer similar protective benefits with reduced ecological impact.

In conclusion, Ultraviolet Absorbent UV-P is a vital chemical substance in the field of materials science, providing essential UV protection across various industries. Its discovery marked a significant advancement in the development of durable and aesthetically pleasing products, particularly in plastics, coatings, and textiles. As research progresses and sustainability becomes increasingly important, UV-P remains a key component in enhancing the performance and longevity of materials exposed to sunlight.

References

2024. Topical Sunscreening Agents. *Sunscreens for Skin of Color*.
DOI: 10.1007/978-981-97-3195-4_8

2023. Pharmaceuticals and personal care products in Tunisian hospital wastewater: occurrence and environmental risk. *Environmental Science and Pollution Research International*, 31(3).
DOI: 10.1007/s11356-023-31220-1

2022. One-pot fabrication cellulose/silica composite microcapsules and their application in cotton fabrics. *Cellulose*, 29(8).
DOI: 10.1007/s10570-022-04508-7