Sodium Carbonate Anhydrous Extra Pure
Sodium Carbonate Anhydrous Extra Pure is a high-purity, white crystalline or powdery inorganic salt known for its strong alkalinity and water solubility. Commonly referred to as soda ash, it is widely used in laboratory analysis, pH regulation, chemical synthesis, glass manufacturing, and as a food additive (E500ii). Its consistent quality and chemical stability make it suitable for high-precision applications in research, industry, and regulated production environments. It must be stored in a dry, sealed container to prevent moisture absorption and degradation.
Sodium Carbonate Anhydrous Extra Pure
PRIMARY USES
Analytical Reagent & Laboratory Applications:
• Used as a primary standard in acid-base titrations
• Acts as a buffering agent in analytical chemistry and sample preparation
• Utilized in qualitative and quantitative analysis for carbonate and bicarbonate detection
Glass & Ceramics Manufacturing:
• Essential fluxing agent in glass and ceramic production
• Lowers the melting point of silica, improving manufacturability and durability of glass
• Used in enamel and frit formulations for better fusion
Pharmaceutical & Cosmetic Industry:
• Functions as a pH adjuster in pharmaceutical formulations
• Used in skin-care products and toothpaste for its alkalinity and mild cleansing effect
SECONDARY USES
Food Industry (regulated quantities):
• Employed as a food additive (E500ii) for pH regulation and leavening in bakery products
• Used in cocoa processing and ramen noodle production to modify texture and flavor
Chemical Manufacturing:
• Intermediate in the production of sodium compounds such as sodium silicates and phosphates
• Used in detergent production as a water softener and alkaline builder
Water Treatment:
• Helps adjust pH in water treatment systems
• Precipitates hardness ions to improve water quality
Textile & Dyeing Industry:
• Used to fix reactive dyes onto cotton fibers
• Acts as a cleansing and neutralizing agent during textile processing
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Basic Identification Attributes
• Chemical Name: Sodium Carbonate (Anhydrous)
• CAS Number: 497-19-8
• HS Code: 2836.20.00
• Molecular Formula: Na₂CO₃
• Synonyms:
- Soda ash
- Disodium carbonate
- Anhydrous soda
- Carbonic acid disodium salt
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Physical & Chemical Properties
Physical State: White, granular or powdered solid
• Color & Odor: White, odorless
• Melting Point: ~851 °C
• Boiling Point: Decomposes before boiling
• Density/Specific Gravity: ~2.53 g/cm³
• Solubility:
- Soluble in water (~22 g/100 mL at 20 °C)
- Insoluble in alcohol
• pH Level: Strongly alkaline (pH ~11.5 for 1% solution)
• Vapor Pressure & Volatility: Not volatile
• Flash Point: Not applicable
• Autoignition Temperature: Not applicable
• Viscosity: Not applicable
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Safety & Hazard Attributes
Hazard Class (GHS Classification):
- Eye irritation (Category 2A)
- Skin irritation (Category 2)
• NFPA Ratings: - Health: 2
- Flammability: 0
- Reactivity: 0
• Exposure Limits: - No specific OSHA PEL or ACGIH TLV established
• Reactivity: - Stable under normal conditions
- Reacts with acids to produce COâ‚‚ gas
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Storage & Handling Attributes
Storage Conditions:
- Store in a dry, cool, well-ventilated area
- Keep containers tightly closed to avoid moisture uptake
• Incompatible Materials: - Acids (reacts to release CO₂)
- Moist air (hygroscopic)
• Container Type: - Polyethylene or sealed metal drums
• Shelf Life & Expiration Date: - Stable for several years under dry storage
• Special Handling Requirements: - Use gloves and goggles
- Avoid generating or inhaling dust
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Regulatory & Compliance Attributes
Regulatory Status:
- Approved for use as a food additive (E500ii)
- Listed under REACH, OSHA, EPA, and FDA
• Transportation Restrictions: - Not classified as hazardous for transport
• Waste Disposal Method: - Dispose of in accordance with local environmental regulations
- Non-hazardous waste classification
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Environmental & Health Impact
Ecotoxicity:
- Low toxicity to aquatic life
• Persistence in Environment: - Disperses readily in water and neutralizes to form natural carbonates
• Carcinogenicity/Mutagenicity: - Not classified as carcinogenic or mutagenic
• Biodegradability: - Inorganic; not biodegradable but environmentally benign
SAFETY PRECAUTIONS
Personal Protective Equipment (PPE):
• Wear chemical-resistant gloves (e.g., nitrile)
• Use safety goggles or face protection
• Wear a lab coat or protective clothing
• Use dust mask or respirator if dust is generated
Handling:
• Handle in a well-ventilated area
• Avoid breathing dust
• Prevent contact with eyes, skin, and clothing
• Wash hands after handling
Storage:
• Keep container tightly closed and stored in a dry area
• Protect from moisture and incompatible materials like acids
FIRST AID MEASURES
Inhalation:
• Move person to fresh air
• Seek medical attention if respiratory symptoms develop
Skin Contact:
• Wash thoroughly with soap and water
• Remove contaminated clothing
• Seek medical advice if irritation occurs
Eye Contact:
• Rinse eyes with plenty of water for at least 15 minutes
• Hold eyelids open during rinsing
• Seek medical attention if irritation persists
Ingestion:
• Rinse mouth with water
• Do not induce vomiting
• Seek medical attention if symptoms appear
FIRE FIGHTING MEASURES
Flammability:
• Non-flammable
Extinguishing Media:
• Use any media suitable for surrounding fire (water spray, foam, CO₂, dry chemical)
Hazardous Combustion Products:
• May release sodium oxide fumes when heated to decomposition
Firefighter Protection:
• Wear full protective gear and self-contained breathing apparatus (SCBA)