Thymol Blue CAS 76-61-9

1. Thymol Blue is a sulfonephthalein pH indicator with two distinct color transition ranges: it changes from red to yellow between pH 1.2 and 2.8 (acidic range), and from yellow to blue between pH 8.0 and 9.6 (alkaline range) .
2. Thymol blue CAS 76-61-9 is employed in diagnostic assay manufacturing, hematology, and histology applications, as well as for in situ spectrophotometric pH measurement in research laboratories .
3. In microbiology and cell culture, Thymol Blue is used to monitor pH changes in growth media, helping assess microbial metabolism and activity through visual color indication .
4. The sodium salt form (Thymol Blue sodium salt) is utilized in food testing for quality control, environmental monitoring of water quality, and educational laboratory experiments to teach acid-base chemistry principles .

1. Thymol Blue must be stored in a tightly sealed container in a cool, dry, and well-ventilated environment, protected from light; recommended storage is at room temperature in a cool and dark place below 15°C .
2. Thymol blue CAS 76-61-9 form is considered nonhazardous according to GHS classifications for the Hazard Communication Standard, though standard prudent laboratory practices should always be observed .
3. Personnel must wear chemical-resistant gloves (nitrile), safety goggles with side-shields, and protective clothing when handling this substance; a dust mask (type N95) is recommended to avoid inhalation of dust particles .
4. Keep away from incompatible materials such as strong oxidizing agents; store with dyes, indicators, and stains according to standard chemical storage patterns .

1. Isolate the spill area, ensure adequate ventilation, and wear full personal protective equipment including chemical-resistant gloves, safety goggles, and a suitable dust respirator (type N95 or equivalent) when Thymol Blue is released .
2. Collect Thymol blue CAS 76-61-9 by sweeping or vacuuming without creating dust using non-sparking tools, and place into a sealed bag or suitable closed container for disposal .
3. Avoid creating dust clouds during cleanup to prevent respiratory exposure; ventilate the area and wash the spill site thoroughly after material pickup is complete .
4. Dispose of collected material according to local, state, and federal environmental regulations; consult the Flinn Suggested Disposal Method #26a or equivalent guidance for proper disposal .

1. Thymol Blue is a nonflammable solid and is not classified as highly flammable; however, when heated to decomposition, it may emit toxic fumes .
2. Use a tri-class dry chemical powder, carbon dioxide, water spray, or alcohol-resistant foam to extinguish fires involving the product .
3. Firefighters Thymol blue CAS 76-61-9 should wear self-contained breathing apparatus in pressure-demand, MSHA/NIOSH approved, and full protective gear when handling burning Thymol Blue due to hazardous decomposition gases generated by thermal decomposition .
4. Hazardous decomposition products formed under fire conditions may include toxic fumes; move containers from the fire area if safe to do so, and contain fire runoff to prevent environmental contamination .