Phenol Red Extra Pure
$ 17.20
Phenol Red Extra Pure is a highly refined pH indicator dye widely used in biological and chemical laboratories. Appearing as a reddish crystalline powder, it changes color based on pH—yellow in acidic environments (pH < 6.8), red in neutral to slightly basic conditions (around pH 7.4), and fuchsia in more alkaline solutions (pH > 8.2).
This Extra Pure grade is particularly suited for cell culture media, where it helps monitor pH fluctuations during cell growth and metabolic activity. It is also employed in analytical chemistry, water quality testing, and titrations. Phenol Red is stable under normal storage conditions but should be kept in a dry, tightly sealed container away from strong acids or bases. Proper lab safety protocols—such as wearing gloves and goggles—are recommended when handling the powder or concentrated solutions.
Phenol Red Extra Pure
PRIMARY USES
- Serves as a pH indicator in cell culture media, showing color changes from yellow (acidic) to red (neutral) to fuchsia (alkaline).
- Widely used in microbiology and biochemistry to monitor pH changes due to microbial activity.
- Integral component in cell and tissue culture, helping detect contamination and metabolic activity.
- Utilized in aquarium and pool water testing kits to measure pH levels.
- Applied in clinical diagnostics, especially in phenol red thread tests for eye tear production.
SECONDARY USES
- Employed in educational labs for demonstrating acid-base reactions and pH scales.
- Occasionally used in urine analysis kits as a pH indicator.
- Used in formulation of test kits for enzymes or bacteria that alter pH in solution.
- Functions as a colorimetric marker in various experimental protocols.
- May be used in toxicology studies as a tracer to observe chemical exposure effects in cultures.
1. Basic Identification Attributes
- Chemical Name: Phenol Red
- CAS Number: 143-74-8
- HS Code: 3822.00.00
- Molecular Formula: C₁₉H₁₄O₅S
- Synonyms:
- Phenolsulfonphthalein
- PSP
- Sulfonphthalein
- C.I. 45350
2. Physical & Chemical Properties
- Physical State: Solid (powder or crystalline form)
- Color & Odor: Reddish to dark purple powder; odorless
- Boiling Point: Decomposes before boiling
- Melting Point: ~280 °C (with decomposition)
- Density: ~1.36 g/cm³
- Solubility:
- Slightly soluble in water
- Soluble in alcohol and alkaline solutions
- pH Range (Indicator Use):
- Yellow at pH < 6.4
- Red at pH > 8.2
- Vapor Pressure: Negligible
- Flash Point: Not applicable (non-flammable solid)
- Autoignition Temperature: Not readily available
- Viscosity: Not applicable
3. Safety & Hazard Attributes
- Hazard Class (GHS Classification):
- Not classified as hazardous under GHS for general lab use
- May cause mild irritation to skin or eyes with prolonged contact
- NFPA Ratings:
- Health: 1
- Flammability: 1
- Reactivity: 0
- Exposure Limits: Not established (low toxicity)
- Reactivity:
- Stable under normal conditions
- Incompatible with strong oxidizing agents
4. Storage & Handling Attributes
- Storage Conditions:
- Store in a cool, dry, and well-ventilated place
- Avoid moisture and direct sunlight
- Incompatible Materials:
- Strong oxidizers and strong acids
- Container Type: Tightly sealed plastic or glass containers
- Shelf Life & Expiration Date: 2–3 years under proper storage
- Special Handling Requirements:
- Use gloves and protective eyewear
- Avoid inhalation of dust
5. Regulatory & Compliance Attributes
- Regulatory Status:
- Listed under TSCA and REACH
- Not considered a hazardous chemical under OSHA regulations
- Transportation Restrictions:
- Not classified as hazardous for transport
- Waste Disposal Method:
- Dispose of in accordance with local, regional, and national regulations
- Dilute solutions may be disposed via standard wastewater (verify with local authority)
6. Environmental & Health Impact
- Ecotoxicity:
- Low toxicity to aquatic life in small quantities
- Persistence in Environment:
- Degradable, but specific rates vary with environmental conditions
- Carcinogenicity/Mutagenicity:
- Not listed as carcinogenic or mutagenic by IARC or OSHA
- Biodegradability:
- Generally considered biodegradable in natural conditions
SAFETY PRECAUTIONS
Personal Protective Equipment (PPE):
- Wear lab coats, chemical-resistant gloves (e.g., nitrile), and protective safety goggles.
- Use a dust mask or work in a fume hood to avoid inhalation of fine particles.
Handling:
- Avoid contact with skin, eyes, and clothing.
- Prevent dust formation and avoid breathing dust.
- Wash hands thoroughly after handling.
Storage:
- Store in a tightly sealed container in a cool, dry, and well-ventilated area.
- Protect from direct sunlight and moisture.
- Keep away from strong oxidizing agents.
FIRST AID MEASURES
Inhalation:
- Move the person to fresh air.
- Seek medical attention if symptoms such as coughing or difficulty breathing occur.
Skin Contact:
- Wash affected areas with plenty of water and soap.
- Remove contaminated clothing.
- Seek medical advice if irritation develops.
Eye Contact:
- Rinse immediately with plenty of water for several minutes.
- Remove contact lenses if it is easy to do so.
- Continue rinsing and seek medical attention if irritation persists.
Ingestion:
- Rinse mouth with water.
- Do not induce vomiting.
- Seek medical attention if symptoms occur.
FIRE FIGHTING MEASURES
Flammability:
- Not highly flammable but can burn if involved in fire.
Extinguishing Media:
- Use dry chemicals, CO₂, or foam.
- Water spray can be used to cool exposed containers.
Hazardous Combustion Products:
- May release carbon monoxide, carbon dioxide, and sulfur oxides upon combustion.
Firefighter Protection:
- Wear full protective gear and self-contained breathing apparatus (SCBA).
- Avoid inhaling combustion fumes.
Related products
Acetone Extra Pure
Acetone Extra Pure is a highly volatile, flammable, and colorless liquid widely used as a powerful solvent in laboratory and industrial applications. Known for its exceptional ability to dissolve a wide range of substances, it is commonly employed for cleaning laboratory glassware, thinning resins, and removing organic residues. In the cosmetics and pharmaceutical industries, acetone is used in nail polish removers and formulation processes. Its high evaporation rate and purity make it suitable for analytical procedures and synthesis work, especially where contaminant-free solvents are essential. With a distinct odor and low boiling point, Acetone Extra Pure is an indispensable reagent for both routine and specialized chemical operations.
Magnesium Hydroxide Heavy Extra Pure
Magnesium Hydroxide Heavy Extra Pure is a high-purity, dense white powder widely utilized for its antacid and absorbent properties. In pharmaceutical formulations, it acts as a gentle laxative and an effective antacid to neutralize stomach acid. Due to its high purity, it is also used in laboratory experiments and analytical chemistry where precise reactions are essential. In cosmetic and personal care products, it functions as a pH adjuster and an absorbent in creams, lotions, and deodorants. Additionally, it serves roles in wastewater treatment, flame retardants, and ceramic manufacturing, offering consistent performance and low impurity content.
Magnesium Nitrate Hexahydrate Extra Pure
Magnesium Nitrate Hexahydrate Extra Pure is a crystalline compound known for its high solubility in water and exceptional purity, making it suitable for both laboratory and industrial applications. In analytical chemistry, it is commonly used as a reagent for preparing standard solutions and as a source of magnesium ions in various experimental procedures. Its oxidizing properties make it valuable in pyrotechnics and fertilizer formulations, where it provides essential nutrients for plant growth. This compound is also employed in ceramic production, textile treatments, and catalyst preparations, where a consistent, high-quality nitrate source is required. Its extra pure grade ensures minimal contamination, essential for high-precision work.
Malachite Green Extra Pure
Malachite Green Extra Pure is a synthetic dye of exceptional purity, recognized for its intense green coloration and versatile laboratory uses. It is commonly used as a biological stain, especially in microbiology for identifying and differentiating bacterial species, and in histology for staining cell structures. Additionally, Malachite Green serves as an effective fungicide and antiparasitic agent in aquaculture and laboratory testing. Its high purity ensures reliable performance in analytical applications, including redox titrations and as a pH indicator in specific chemical reactions. Its vivid color and chemical stability make it a valuable reagent in both teaching and professional research settings.
Malic Acid Extra Pure
Malic Acid Extra Pure is a high-grade, naturally occurring dicarboxylic acid known for its sharp, tart flavor and versatility in both laboratory and industrial settings. It is commonly found in fruits such as apples and is widely used as an acidulant in food and beverage formulations, where it enhances flavor, preserves freshness, and improves pH stability. In laboratory applications, Malic Acid is employed in biochemical research, particularly in studies involving the citric acid cycle, due to its role as an intermediate metabolite. Its excellent solubility in water and mild acidity also make it suitable for cosmetic formulations and pharmaceutical preparations. The extra pure grade ensures high analytical accuracy and consistent quality across applications requiring strict purity standards.
Maltose Extra Pure
Maltose Extra Pure is a disaccharide composed of two glucose units, commonly known as malt sugar. This extra pure grade ensures exceptional quality and consistency, making it ideal for use in biochemical research, fermentation studies, and laboratory analysis. In the food industry, maltose is valued for its mild sweetness and is often used in brewing, baking, and confectionery to promote fermentation and enhance flavor. It also plays a role in energy metabolism studies and is frequently used as a carbon source in microbiological media. Its stability and solubility in water make it easy to incorporate into various formulations, offering a dependable ingredient for scientific and industrial use where high purity is essential.
Marble Chips Extra Pure
Marble Chips Extra Pure are high-grade, naturally occurring calcium carbonate fragments that have been carefully processed to ensure exceptional purity. These white or off-white chips are widely used in laboratory experiments, especially in demonstrations involving acid-carbonate reactions where the release of carbon dioxide is observed. Beyond educational and research use, they also serve as a buffering agent, filtration medium, and mild abrasive in various industrial applications. Due to their chemical stability and high calcium content, marble chips are ideal for use in controlled environments where contaminants must be minimized.
Menthol Crystals Extra Pure
Menthol Crystals Extra Pure are colorless to white, needle-like crystals derived from peppermint or other mint oils and refined to the highest purity. Known for their strong, refreshing minty aroma, they are widely used in pharmaceutical, cosmetic, and personal care formulations. These crystals provide a cooling sensation on the skin and mucous membranes, making them a common ingredient in balms, liniments, throat lozenges, and inhalants. In laboratories, menthol crystals are also used in sensory studies and product development. Their purity ensures consistent performance and minimal interference in sensitive formulations.

Preservatives(food)
Flavors
Acidulants
Sweeteners
Antioxidants
Colorants(food)
Nutraceutical Ingredients (food)
Nutrient Supplements
Emulsifiers
Collectors
Dust Suppressants
Explosives and Blasting Agents
Flocculants and Coagulants
Frothers
Leaching Agents
pH Modifiers
Precious Metal Extraction Agents
Antioxidants(plastic)
Colorants (Pigments, Dyes)
Fillers and Reinforcements
Flame Retardants
Monomers
Plasticizers
Polymerization Initiators
Stabilizers (UV, Heat)
Antifoaming Agents
Chelating Agents
Coagulants and Flocculants
Corrosion Inhibitors
Disinfectants and Biocides
Oxidizing Agents
pH Adjusters
Scale Inhibitors( water)
Antioxidants(cosmetic)
Emollients
Oils
Carrier Oills
Essential Oils
Humectants
Preservatives
Surfactants(cosmetic)
Thickeners
UV Filters
Fragrance (Cosmetics)
Fertilizers
Soil Conditioners
Plant Growth Regulators
Animal Feed Additives
Biostimulants
Pesticides (Herbicides, Insecticides, Fungicides)
Active Pharmaceutical Ingredients (APIs)
Excipients
Solvents(pharmaceutical)
Antibiotics
Antiseptics and Disinfectants
Vaccine Adjuvants
Nutraceutical Ingredients (pharmaceutical)
Analgesics & Antipyretics
Analytical Reagents
Solvents(lab)
Chromatography Chemicals
Spectroscopy Reagents
microbiology-and-cell-culture-reagents
Molecular Biology Reagents
Biochemical Reagents
Inorganic and Organic Standards
Laboratory Safety Chemicals
Specialty Laboratory Chemicals(Special Laboratory Equipment)
Demulsifiers
Hydraulic Fracturing Fluids
Scale Inhibitors(oil)
Surfactants(oil)
Drilling Fluids
Dyes and Pigments
Bleaching Agents
Softening Agents
Finishing Agents
Antistatic Agents
Admixtures
Waterproofing Agents
Sealants and Adhesives
Curing Compounds
Concrete Repair Chemicals
Anti-Corrosion Coatings
Surfactants(cleaning)
Builders
Enzymes
Solvents (Cleaning)
Electronic Chemicals
Catalysts
Lubricants
Photographic Chemicals
Refrigerants
Automotive chemicals
Pyrotechnic Chemicals
Biodegradable Surfactants
Bio-based Solvents
Renewable Polymers
Carbon Capture Chemicals
Wastewater Treatment Chemicals
Pigments
Solvents(paint)
Specialty Coatings
Binders/Resins
Additives
Driers
Anti-Corrosion Agents
Functional Coatings
Application-Specific Coatings
Leavening Agents
Dough Conditioners
Flour Treatments
Fat Replacers
Decoratives
Preservatives(baking)
Plasticizers & Softeners
Reinforcing Agents
Adhesion Promoters
Vulcanizing Agents
Antidegradants
Blowing Agents
Fillers & Extenders
Accelerators & Retarders