Product name: UV absorber UV-327

Product Name: 2-(2'-Hydroxy-3',5'-di-tert-butylphenyl)-5-chlorobenzotriazole

CAS: 3864-99-1

Molecular Formula: C20H24ClN3O

Molecular Weight: 357.88

EINECS: 223-383-8

Structural formula:

Melting Point: 150-153°C(lit.)

Boiling Point: 469.2±55.0°C(Predicted)

Density: 1,26g/cm³

Flash Point: 234°C

Storage condition: Keep in dark place,Sealed in dry,Room Temperature

Solubility: Chloroform, Ethyl Acetate (Slightly), Methanol (Slightly).

pKa: 9.23±0.48(Predicted).

State: Solid

Color: Off-White to Pale Yellow

Stability: Light Sensitive

Physicochemical properties

Appearance: Light yellow powder

Light transmittance:

460nm≥95

%500nm≥97%

Volatile matter: ≤0.3%.

Ash: ≤0.05%.

Melting Point: 154-158℃

Contents: ≥99%.

Weight loss rate (TGA): 2145%, 23010%, 26750%.

Toxicity: Low toxicity, oral LD50>5g/kg body weight in rats.

Product Features

1. High temperature resistance and good thermal stability.

2. It is not sensitive to metal ions.

3. Non-flammable, non-explosive, non-toxic, safe and harmless to use.

4. It almost does not absorb visible light, especially suitable for colorless transparent and light-colored products.

5. Good photographic stability, strong absorption of ultraviolet light.

6. It does not change yellow under alkaline conditions and is oil-resistant.

7. Low volatility and less loss during processing.

8. Good thermal stability, can be used for plastic products that need high temperature processing.

Features & Uses

It has large solubility in solvents and plasticizers such as benzene, toluene, styrene, methyl methacrylate, cyclohexane, etc. Slightly soluble in alcohol, ketone, insoluble in water, and antioxidants have a good synergistic effect. The product has low volatility and good compatibility with resin, and is suitable for a variety of coatings such as polypropylene, polyethylene, polyoxymethylene and polymethyl methacrylate, especially for polypropylene fiber.

Storage

Avoid sunlight, high temperature, humidity, and light stabilizers containing sulfur or halogenated elements, and need to be stored and stored under sealed, dry and dark conditions.

Chemical properties

Light yellow powder. It has large solubility in solvents and plasticizers such as benzene, toluene, styrene, methyl methacrylate, cyclohexane, etc. Slightly soluble in alcohol, ketone, insoluble in water.

Uses

Ø Excellent light stabilizer, with antioxidants and good synergistic effect. The product has low volatility and good compatibility with resin, and is suitable for polypropylene, polyethylene, polyoxymethylene and polymethyl methacrylate, especially for polypropylene fiber.

Ø It is especially suitable for polyethylene and polypropylene, and can also be used for polyoxymethylene, polymethyl methacrylate, polyurethane and a variety of coatings