Product name: UV absorber UV-328

Product Name: 2-(2H-benzotriazol-2-yl)-4,6-di-tert-pentylphenol

CAS: 25973-55-1

Molecular Formula: C22H29N3O

Molecular Weight: 351.49

EINECS: 247-384-8

Melting Point: 80-83°C

Boiling Point: 469.1±55.0 °C(Predicted)

Density: 1.08±0.1 g/cm³ (Predicted)

Vapor pressure: 0Pa at 20°C

Storage condition: Freeze at -20°C

Solubility: DMSO (slightly soluble), ethyl acetate (slightly soluble), methanol (slightly soluble, sonicated).

pKa: 8.85±0.50(Predicted).

State: Solid

Color: Off-white to pale yellow

LogP: 7.3 at 25℃

Appearance: Light yellow powder

Light transmittance:

440nm ≥96.0%

500nm ≥97.0%

Volatile matter: ≤0.3%.

Ash: ≤0.1%.

Melting Point: 80～88℃

Content: ≥95%.

Toxicity: Low toxicity

Uses: Suitable for polymers such as polyolefins (especially polyvinyl chloride), polyester, styrene, polyamide, polycarbonate, etc.

Features &Uses

As a UV absorber, soluble in benzene, toluene, styrene, cyclohexane, methyl methacrylate, ethyl acetate, ketones and other organic solvents, this product is mainly suitable for polyolefin, polystyrene, polyvinyl chloride, polyurethane, polyester and other products. It is an excellent variety of benzotriazole ultraviolet absorber. The maximum absorption wavelength is 345nm. The general dosage is about 0.1%.

Storage

Avoid sun, high light, humidity, and avoid light stabilizers containing sulfur or halogenated elements. It needs to be stored in a sealed, dry and dark condition.