2-Hydroxy-4-(octyloxy)benzophenone /UV-531 /Octabenzone CAS 1843-05-6

Product name:2-Hydroxy-4-(octyloxy)benzophenone /UV-531 /Octabenzone

CAS:1843-05-6

MF:C21H26O3

MW:326.43

EINECS:258-207-9

Melting point:47-50°C

Boiling point:424°C

Density:1.16 g/cm3

Purity:≥99%

White crystalline powder

1. 2-Hydroxy-4-(octyloxy)benzophenone CAS 1843-05-6 is a benzophenone-type UV absorber widely used to protect polymers such as PVC, polyethylene, polypropylene, and EVA from UV degradation, preventing yellowing, cracking, and loss of mechanical properties.
2. UV-531 CAS 1843-05-6 is particularly effective in polypropylene, where it was identified as the most effective among five commercial stabilizers tested, retaining 81% yield strength after 32 hours of UV irradiation compared to only 18% for unstabilized PP .
3. Octabenzone CAS 1843-05-6 is employed in agricultural films, monofilaments, films, cables, and outdoor plastic products, with recommended dosage levels of 0.2-0.5% for polyethylene and 0.2-0.3% for polypropylene injection molding .
4. UV-531 CAS 1843-05-6 can be used in synergistic combination with Hindered Amine Light Stabilizers (HALS), achieving 89% tensile strength retention after 500 hours of accelerated weathering versus 68% for UV-531 alone at the same total loading .

1. Store 2-Hydroxy-4-(octyloxy)benzophenone CAS 1843-05-6 in a dry, clean, and well-ventilated place, avoiding exposure to light and heat to prevent oxidation .
2. UV-531 CAS 1843-05-6 should be kept in a sealed container at room temperature in a dry environment .
3. Octabenzone CAS 1843-05-6 is classified as a combustible solid (Storage Class 11) and should be stored away from ignition sources .
4. The product has a shelf life of 24 months under appropriate storage conditions according to the manufacturer .

1. 2-Hydroxy-4-(octyloxy)benzophenone CAS 1843-05-6 is classified as a skin sensitizer (Skin Sens. 1B) under GHS, with risk phrase R43 (may cause sensitization by skin contact) .
2. UV-531 CAS 1843-05-6 carries risk phrases R36/37/38 (irritating to eyes, respiratory system, and skin) and R50/53 (very toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment) .
3. Octabenzone CAS 1843-05-6 has an oral LD50 greater than 10 g/kg in rats, indicating low acute oral toxicity .
4. A 2025 study on zebrafish found that UV-531 exposure at environmentally relevant concentrations (0.1-1.6 μg/L) caused developmental neurotoxicity, including reduced locomotor activity, dopaminergic neuron injury, blood-brain barrier leakage, and multiple sclerosis-like symptoms via calcium homeostasis imbalance .

1. 2-Hydroxy-4-(octyloxy)benzophenone CAS 1843-05-6 is not safe for uncontrolled release into the environment due to its very high aquatic toxicity (R50/53) .
2. UV-531 CAS 1843-05-6 requires protective equipment including gloves, safety goggles, and appropriate clothing to avoid skin sensitization and irritation .
3. Octabenzone CAS 1843-05-6 is regulated as an environmentally hazardous substance for transport (UN 3077, Class 9, Packing Group III) .
4. Recent research suggests that UV-531 exposure may pose neurodevelopmental risks at environmentally relevant concentrations, and a safe dose range should be established, though further research is needed to fully understand human health implications .

1 kg/bag, 25 kg/bag, 1000 kg/bag or based on customers' requirements.

Transportation

We arrange suitable logistics schemes based on each customer's needs. Small-volume goods can be delivered via air shipment or international express services like FedEx, DHL, TNT, UPS and specialized cross-border logistics lines. For bulk orders, sea transportation can be arranged to reach your appointed port. Beyond that, we are capable of offering value-added customized logistics services considering product features and specific client requests.

Payment

 

To facilitate smooth cooperation,we offers multiple flexible settlement solutions for clients. Small orders can be settled via PayPal, Western union. For substantial orders, we adopt T/T, L/C at sight. Furthermore, Alipay and WeChat pay have become popular payment choices among our customers.

 

 

 

 

 

Customer Visit

 

 

Customer Trust