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Methyl Red Solution Extra Pure
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Methyl Red Solution Extra Pure is a ready-to-use, high-purity pH indicator solution widely used in laboratories for acid-base titrations and biochemical assays. It changes color from red at pH below 4.4 to yellow above pH 6.2, making it highly effective in detecting pH shifts with clear visual transitions. This solution is particularly valuable in analytical chemistry, microbiology (such as the methyl red test in bacterial identification), and educational experiments. Its extra pure grade ensures consistent performance, high accuracy, and minimal impurities, making it suitable for precise scientific applications.
Description
Methyl Red Solution Extra Pure
Primary Uses:
- pH Indicator Solution – Ready-to-use liquid indicator for acid-base titrations, especially effective in the pH range of 4.4 (red) to 6.2 (yellow).
- Microbiological Testing – Used directly in the Methyl Red (MR) Test to detect mixed acid fermentation by enteric bacteria (e.g., E. coli).
Secondary Uses:
- Teaching and Demonstration – Convenient for laboratory education on pH and indicators due to its visible color change.
- Buffer System Monitoring – Employed in experiments involving buffer solutions that operate near the pH transition range of methyl red.
PRODUCT KEY FEATURES
1. Basic Identification Attributes
- Chemical Name: Methyl Red Solution
- Active Ingredient: Methyl Red (C₁₅H₁₅N₃O₂)
- Typical Concentration: 0.02% to 0.1% Methyl Red in ethanol or aqueous ethanol
- CAS Number (for Methyl Red): 493-52-7
- Molecular Weight (Active): 269.30 g/mol
- Appearance: Red to orange liquid
- Odor: Alcoholic, depending on solvent
- Solubility: Miscible with water and ethanol
- Grade: Extra Pure
- pH Range (Indicator Function):
- Red at pH < 4.4
- Yellow at pH > 6.2
2. Safety & Hazard Attributes
- GHS Classification (based on ethanol solvent):
- Flammable Liquid (Category 2)
- Eye Irritant (Category 2)
- Skin Irritant (Category 2)
- Hazard Statements:
- H225: Highly flammable liquid and vapor
- H315: Causes skin irritation
- H319: Causes serious eye irritation
- Precautionary Statements:
- P210: Keep away from heat/sparks/open flames—No smoking
- P280: Wear protective gloves/protective clothing/eye protection
- P305+P351+P338: IF IN EYES: Rinse cautiously with water
- PPE Required:
- Gloves
- Lab coat
- Eye protection
- Use under fume hood for large volumes
- First Aid:
- Skin/Eye Contact: Rinse immediately with water
- Inhalation: Move to fresh air
- Ingestion: Do not induce vomiting; seek medical help
- Fire Hazards:
- Flammable—Keep away from ignition sources
- Extinguishing Media: CO₂, dry chemical, alcohol-resistant foam
3. Storage & Handling
- Storage Conditions:
- Store in tightly closed amber container
- Keep in a cool, well-ventilated area
- Keep away from sources of ignition and incompatible materials (oxidizers)
- Handling Tips:
- Avoid inhalation, skin contact, and ingestion
- Use in a well-ventilated area
4. Laboratory Applications
- Primary Uses:
- pH indicator in titrations (acid–base reactions)
- Commonly used in the MR-VP (Methyl Red-Voges Proskauer) test in microbiology
- Secondary Uses:
- Educational chemistry kits and laboratory demonstrations
- Color reference in analytical and buffer preparation
SAFETY HANDLING PRECAUTIONS
SAFETY PRECAUTIONS
Personal Protective Equipment (PPE):
- Wear a lab coat, nitrile gloves, and chemical splash goggles.
- Use in a fume hood to minimize inhalation exposure.
Handling:
- Avoid contact with skin, eyes, and clothing.
- Prevent spillage and inhalation of vapors.
- Ensure good ventilation during use.
- Wash thoroughly after handling.
Storage:
- Store in a cool, dry, and well-ventilated area.
- Keep the container tightly closed and away from direct sunlight and heat sources.
- Do not store near oxidizing agents.
FIRST AID MEASURES
Inhalation:
- Move the person to fresh air immediately.
- Seek medical attention if breathing difficulties occur.
Skin Contact:
- Rinse skin thoroughly with soap and water.
- Remove and wash contaminated clothing.
- Seek medical advice if irritation or redness develops.
Eye Contact:
- Rinse cautiously with plenty of water for at least 15 minutes.
- Remove contact lenses if present and easy to do.
- Continue rinsing and seek medical attention.
Ingestion:
- Rinse mouth with water.
- Do not induce vomiting.
- Seek immediate medical help.
FIRE FIGHTING MEASURES
Flammability:
- Solution may contain flammable solvents depending on formulation.
Extinguishing Media:
- Use dry chemicals, carbon dioxide (CO₂), or alcohol-resistant foam.
- Water spray may be used to cool containers.
Hazardous Combustion Products:
- May emit carbon oxides and nitrogen oxides upon combustion.
Firefighter Protection:
- Wear self-contained breathing apparatus (SCBA) and full protective gear.
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