UV Absorber 328 manufacturer CAS:25973-55-1

Product Name: UV Absorber 328

Other Name: Ultraviolet absorbent UV-328;2-(2H-Benzotriazol-2-yl)-4,6-ditertpentylphenol

CAS No: 25973-55-1

MF: C22H29N3O

MW: 351.48500

Density: 1.08g/cm3

Boiling point: 469.1ºC at 760 mmHg

Melting point: 80-83°C

Flash point: 229ºC

Refractive index: 1.575

UN Number: Not dangerous goods.

UN Proper Shipping Name: Not dangerous goods.

Transport hazard class: Not dangerous goods.

Packing group: Not dangerous goods.

Specification

Appearance: Light yellow powder or cylindrical particles

Assay: ≥99%

Ash: ≤0.10%

Volatile matter: ≤0.50%

Transmittance: 460nm≥96%; 500nm≥97%

Application

UV Absorber 328 is a high-efficiency UV absorber, which can effectively absorb 270-340 nm UV light, the light stability is similar to UV-326 and UV-327, but UV Absorber 328 has good compatibility with resin, low thermal evaporation and high washing resistance.

UV Absorber 328 is suitable for polyolefin (especially polyethylene), polyester, styrenic polymer, polyamide, polymethyl methacrylate, polycarbonate, elastomer and other polymers.

Package: Packed in cardboard drum lined with plastic bag, net weight 25kg/drum, can also be designed according to customer requirements.

Storage: UV-absorbing agent UV-328 is non-toxic, non-flammable, non-explosive, non-corrosive, and has good storage stability.

TEST	UNIT	SPECIFICATION
APPEARANCE		SLIGHTLY YELLOW POWDER
ASSAY	%	99.00MIN
VOLATILES	%	0.50MAX
ASH	%	0.10MAX
MELTING POINT	℃	80.00MIN
TRANSMITTANCE
460nm	%	97.00MIN
500nm	%	98.00MIN

TGA233℃5% 244℃10% 286℃50%

Our company is a professional supplier of functional material additives. Our products include antioxidants, ultraviolet absorbers, light stabilizers, photoinitiators, heat stabilizers, nucleating agents, flame retardants, polyurethane chain extenders, nano light absorbing materials, antibacterial materials, functional masterbatches, colorants etc. After years of steadfast industry accumulation and technological innovation, a relatively complete additive industry chain has been formed in the rubber and plastic industry, ink industry, coating industry, textile printing and dyeing industry, functional resin and other industries. Significant achievements have been made in the field of additives.