4-Bromo-2-chlorophenol CAS 3964-56-5

1. 4-Bromo-2-chlorophenol is a halogenated aromatic compound primarily used as a versatile intermediate in organic synthesis for the production of pharmaceuticals, agrochemicals, and other biologically active compounds .
2. 4-Bromo-2-chlorophenol CAS 3964-56-5 serves as a building block in the synthesis of heterocyclic systems, including dibenzoxazepines and oxazoles, where its reactive halogen atoms enable selective functionalization .
3. 4-Bromo-2-chlorophenol is employed in the preparation of derivatives with potential antimicrobial, antifungal, and anticancer activities, and as a reference standard in analytical chemistry .
4. In material science, 4-Bromo-2-chlorophenol CAS 3964-56-5 is used as a monomer for the synthesis of specialty polymers and as a precursor for the development of advanced functional materials .

1. 4-Bromo-2-chlorophenol must be stored in a tightly sealed container in a cool, dry, and well-ventilated environment, protected from light and moisture; recommended storage at 2-8°C or at room temperature in a cool, dark place below 15°C .
2. 4-Bromo-2-chlorophenol CAS 3964-56-5 is classified with GHS hazard statements H302 (Harmful if swallowed), H312 (Harmful in contact with skin), H315 (Causes skin irritation), H319 (Causes serious eye irritation), and H332 (Harmful if inhaled), with signal word "Warning" .
3. Personnel must wear chemical-resistant gloves (nitrile rubber, minimum 0.11 mm thickness), safety goggles with side-shields, and protective clothing when handling this substance, ensuring adequate ventilation in work areas .
4. Keep away from incompatible materials such as strong oxidizing agents, strong acids, and strong bases to prevent decomposition; wash thoroughly after handling and follow precautionary statements P261, P264, P271, P280, P302+P352, and P305+P351+P338 .

1. Isolate the spill area, ensure adequate ventilation, and wear full personal protective equipment including chemical-resistant gloves, safety goggles, and suitable dust respirator when 4-Bromo-2-chlorophenol is released .
2. Collect 4-Bromo-2-chlorophenol CAS 3964-56-5 by sweeping or vacuuming without creating dust using non-sparking tools, and place into suitable closed containers for disposal .
3. Avoid creating dust clouds during cleanup to prevent respiratory exposure; prevent the product from entering drains or water courses .
4. Dispose of collected material as hazardous waste according to local, state, and federal environmental regulations through licensed chemical destruction or controlled incineration .

1. 4-Bromo-2-chlorophenol is not classified as highly flammable but may decompose under fire conditions, emitting toxic fumes including carbon monoxide, carbon dioxide, and hydrogen halides (hydrogen bromide, hydrogen chloride) .
2. Use 4-Bromo-2-chlorophenol CAS 3964-56-5 water spray, dry chemical powder, carbon dioxide, or alcohol-resistant foam to extinguish fires involving the product; do NOT use a direct water jet as it may scatter burning material .
3. Firefighters should wear self-contained breathing apparatus in pressure-demand, MSHA/NIOSH approved, and full protective gear when handling burning 4-Bromo-2-chlorophenol due to hazardous decomposition gases generated by thermal decomposition .
4. During combustion, may emit irritant and toxic fumes; contain fire runoff to prevent environmental contamination .