Methyl Red CAS 493-52-7

1. Methyl red is primarily used as a pH indicator in analytical chemistry, exhibiting a color change from red at pH 4.4 to yellow at pH 6.2 .
2. Methyl red CAS 493-52-7 serves as a key reagent in the methyl red test (MR test) in microbiology, used to differentiate bacterial species based on their ability to produce mixed acids via glucose fermentation .
3. Methyl red is employed in acid-base titrations, particularly for weak bases, providing a sharp color transition at the endpoint .
4. Researchers utilize Methyl red CAS 493-52-7 in environmental monitoring for water acidity assessment and in educational laboratories for demonstrating acid-base chemistry principles .

1. Methyl red must be stored in a tightly sealed container in a cool, dry, and well-ventilated environment, protected from light and moisture .
2. Methyl red CAS 493-52-7 is classified with hazard statements H302 (Harmful if swallowed), 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 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 Methyl red is released .
2. Collect Methyl red CAS 493-52-7 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. Methyl red is not classified as highly flammable but may decompose under fire conditions, emitting toxic fumes including carbon monoxide, carbon dioxide, and nitrogen oxides (NOx) .
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 Methyl red CAS 493-52-7 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 Methyl red due to hazardous decomposition gases generated by thermal decomposition .
4. During combustion, may Methyl red CAS 493-52-7 emit irritant and toxic fumes; move containers from the fire area if safe to do so, and contain fire runoff to prevent environmental contamination .