4-Chloro-1-naphthol CAS 604-44-4

1. 4-Chloro-1-naphthol is primarily used as a chromogenic substrate in enzyme-linked immunosorbent assays (ELISA) and immunohistochemistry for detecting horseradish peroxidase (HRP) activity, producing a blue-purple precipitate at the site of enzymatic reaction .
2. 4-Chloro-1-naphthol CAS 604-44-4 serves as a sensitive colorimetric substrate for hydrogen peroxide-based enzymatic reactions, where it is oxidized by HRP to form an insoluble colored product visible under light microscopy .
3. 4-Chloro-1-naphthol is employed in diagnostic and research applications, including Western blotting, tissue staining, and cellular localization studies .
4. The compound is utilized in the synthesis of azo dyes and other naphthalene derivatives for specialty chemical applications .

1. 4-Chloro-1-naphthol must be stored in a tightly sealed container in a cool, dry, and well-ventilated environment, protected from light and heat; recommended storage at 2-8°C for short-term stability .
2. 4-Chloro-1-naphthol CAS 604-44-4 is classified with GHS hazard statements H315 (Causes skin irritation), H319 (Causes serious eye irritation), and H335 (May cause respiratory irritation), with signal word "Warning" .
3. Personnel must wear chemical-resistant gloves, safety goggles with side-shields, and protective clothing when handling this substance, ensuring adequate ventilation in work areas .
4. Keep 4-Chloro-1-naphthol CAS 604-44-4 away from incompatible materials such as strong oxidizing agents; avoid formation of dust and aerosols, and wash thoroughly after handling .

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-Chloro-1-naphthol is released .
2. Collect 4-Chloro-1-naphthol CAS 604-44-4 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 according to local, state, and federal environmental regulations through licensed chemical destruction or controlled incineration .

1. 4-Chloro-1-naphthol is combustible with a flash point of 181.1°C; under fire conditions, hazardous decomposition products include toxic fumes of carbon monoxide, carbon dioxide, and hydrogen chloride .
2. Use 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 4-Chloro-1-naphthol CAS 604-44-4 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-Chloro-1-naphthol due to hazardous decomposition gases generated by thermal decomposition .
4. During combustion, may emit irritant and toxic fumes; move containers from the fire area if safe to do so, cool exposed containers with water spray from a protected location, and contain fire runoff to prevent environmental contamination .