Preservatives(food)
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Sodium Sulphite (Blue)
Sodium Sulphite Blue is a white to bluish-white crystalline powder with the chemical formula Na₂SO₃. The “Blue” grade indicates a specific industrial quality often containing minor additives or impurities, used primarily in water treatment and chemical industries. It acts as an effective oxygen scavenger, reducing agent, and preservative. This 25kg packaged product is highly soluble in water, forming alkaline solutions, and is widely used in pulp and paper, water treatment, textile, and photographic industries.
Sodium Sulphite (Blue)
Primary Uses
- Water Treatment
- Oxygen Scavenger: Removes dissolved oxygen from boiler feed water, preventing corrosion in steam and power plants.
- Wastewater Treatment: Neutralizes chlorine and chloramine residuals in drinking water and wastewater.
- Pulp & Paper Industry
- Dechlorination Agent: Removes residual chlorine from bleached pulp.
- Reducing Agent: Used in chemical pulping to protect fibers.
- Textile Industry
- Bleaching Agent: Used for bleaching cotton and wool fibers.
- Dyeing: Acts as an antioxidant in dyeing processes.
- Photographic Industry
- Preservative: Serves as a preservative in photographic developers.
- Chemical Industry
- Sulfur Dioxide Source: Releases SO₂ upon acidification, used in various chemical syntheses.
- Antioxidant: Prevents oxidation in chemical processes.
- Food Industry
- Preservative (E221): Used as a food additive to preserve dried fruits, wine, and other food products by preventing microbial growth and discoloration.
Secondary Uses
- Mining Industry
- Flotation Agent: Used in mineral flotation processes.
- Laboratory & Research
- Reducing Agent: Used in various analytical and synthetic applications.
1. Basic Identification Attributes
- Chemical Name (IUPAC): Sodium sulfite
- Common/Trade Name: Sodium sulphite (Blue grade)
- CAS Number: 7757-83-7
- HS Code: 2831.20.00
- Synonyms: Sodium sulfite, sodium sulphite, blue grade sodium sulphite
2. Physical & Chemical Properties
- Physical State: White to bluish-white crystalline powder
- Color & Odor: Bluish-white; odorless to slight sulfur odor
- Solubility: 22 g/100 mL water at 20°C
- Density: 2.633 g/cm³
- Melting Point: 33 °C (decahydrate) – blue grade typically near anhydrous form melting > 70 °C
- pH (1% solution): Alkaline (approx. 9-10)
- Appearance: Crystalline powder with blue tint
3. Safety & Hazard Attributes
- GHS Classification:
- Skin Irritant (Category 2)
- Eye Irritant (Category 2A)
- Toxicity: LD₅₀ (oral, rat) > 3000 mg/kg
- Exposure Limits: OSHA PEL: 5 mg/m³ (as dust)
- Corrosivity: Non-corrosive but irritating
4. Storage & Handling Attributes
- Storage Conditions: Store in a cool, dry, well-ventilated area, away from moisture and oxidizers
- Container Type: 25kg PE-lined paper bags or plastic drums
- Shelf Life: 12 months if stored properly
- Handling Precautions: Avoid dust inhalation; use protective equipment
5. Regulatory & Compliance Attributes
- REACH Registered
- FDA Approved for food use (E221)
- Complies with OSHA Hazard Communication Standard
- Not classified as hazardous for transport
6. Environmental & Health Impact
- Biodegradability: Inorganic salt; not biodegradable but environmentally safe in normal use
- Ecotoxicity: Low toxicity to aquatic life at typical concentrations
- Bioaccumulation: Not expected
- Aquatic Impact: Excess can lead to oxygen depletion in water bodies
Safety Handling Precautions
- PPE Required: Gloves, dust mask, safety goggles
- Handling Guidelines: Use local exhaust ventilation; avoid dust formation
- Storage Measures: Keep containers tightly closed and dry
First Aid Measures
- Inhalation: Move to fresh air; seek medical attention if symptoms develop
- Skin Contact: Wash with soap and water
- Eye Contact: Rinse thoroughly with water for 15 minutes; seek medical advice if irritation persists
- Ingestion: Rinse mouth; seek medical advice if large amounts ingested
Firefighting Measures
- Fire Hazards: Non-flammable; may emit sulfur oxides when heated
- Extinguishing Media: Use water spray, foam, dry chemical
- Hazardous Combustion Products: Sulfur oxides (SOx)
Related products
Ascorbic Acid
Ascorbic Acid, commonly known as Vitamin C, is a water-soluble vitamin and potent antioxidant essential for collagen synthesis, immune function, and protection against oxidative stress. It is widely used as a nutritional supplement, food preservative, and additive to enhance shelf life and nutritional value. Naturally present in citrus fruits and various vegetables, ascorbic acid is also important in pharmaceutical, cosmetic, and animal feed industries due to its health benefits and preservative qualities.
Benzoic Acid
Benzoic Acid is a white crystalline solid with a faint, pleasant odor, classified as a simple aromatic carboxylic acid. It is widely used as a food preservative, antimicrobial agent, and chemical intermediate. Naturally occurring in many plants, it is commercially produced through oxidation of toluene or extraction from natural sources. Benzoic acid is valued for its ability to inhibit the growth of mold, yeast, and certain bacteria, making it essential in food preservation and cosmetic formulations. It also serves as a precursor in the manufacture of various pharmaceuticals, dyes, and plasticizers.
Carnauba Wax Prime Yellow
Carnauba Wax Prime Yellow, also known as Type 1 or Prime Yellow Grade, is the highest quality and purest form of carnauba wax derived from the leaves of the Copernicia cerifera palm tree, native to Brazil. It is a natural, vegetable-based wax prized for its exceptional hardness, high gloss, high melting point, and emulsification properties. Prime Yellow grade represents the finest classification, characterized by its light yellow to pale amber color, low impurities, and superior film-forming characteristics. It is obtained through a meticulous process of harvesting, drying, and processing the palm leaves to extract the waxy coating, which is then refined and graded. Carnauba Wax is often referred to as the "Queen of Waxes" due to its unique combination of properties unmatched by synthetic alternatives. Technical grade Carnauba Wax Prime Yellow is used across numerous industries for its ability to impart gloss, hardness, slip resistance, and moisture barrier properties. It is not intended for direct food consumption but is widely used in food-contact applications such as coatings and packaging.
Citric Acid Anhydrous
Citric Acid Anhydrous is a white, crystalline organic acid widely used across food, pharmaceutical, cosmetic, and industrial sectors. It is the anhydrous form of citric acid, meaning it contains no water molecules in its crystal lattice, resulting in higher purity and more concentrated acidic properties compared to its monohydrate form. Derived from natural sources like citrus fruits or produced via microbial fermentation, citric acid anhydrous is valued for its sour taste, excellent chelating ability, and buffering capacity. It serves as a natural preservative, pH adjuster, antioxidant synergist, and cleaning agent, making it a versatile ingredient in many formulations.
Citric Acid Monohydrate
Citric Acid Monohydrate is a white, crystalline powder or granule form of citric acid containing one molecule of water per molecule of acid. It is a natural organic acid commonly derived from citrus fruits or produced by fermentation processes. Citric Acid Monohydrate is widely used as an acidulant, preservative, and chelating agent in various industries. Compared to the anhydrous form, it has a slightly lower acid concentration due to the water molecule but offers excellent solubility and stability. It is prized for its sour flavor, buffering capacity, and ability to bind metal ions, making it indispensable in food, pharmaceutical, cosmetic, and industrial applications.
Hydrogen Peroxide Food Grade
Hydrogen Peroxide Food Grade is a highly concentrated aqueous solution of hydrogen peroxide (H₂O₂), formulated specifically for use in food processing and related applications. It appears as a clear, colorless liquid with a slightly sharp, acrid odor. Renowned for its powerful oxidizing and bleaching properties, hydrogen peroxide is a strong antimicrobial agent and environmentally friendly disinfectant that decomposes into water and oxygen, leaving no harmful residues. The food-grade designation ensures compliance with strict purity standards, making it suitable for direct and indirect food contact uses, including sterilization, sanitation, and preservation.
Sodium Benzoate
Sodium Benzoate is the sodium salt of benzoic acid, appearing as a white, crystalline powder that is highly soluble in water. It is widely used as a preservative due to its antimicrobial properties, especially effective against yeast and bacteria in acidic conditions. Sodium Benzoate is commonly employed in the food, beverage, pharmaceutical, and cosmetic industries to extend shelf life and maintain product quality. It meets food-grade and pharmaceutical-grade purity standards, ensuring safety for consumption and topical use.
Vitamin E Acetate (DL-Alpha-Tocopheryl Acetate)
Vitamin E Acetate (DL-Alpha-Tocopheryl Acetate), chemically known as DL-Alpha-Tocopheryl Acetate, is a stable, synthetic form of Vitamin E used widely in pharmaceuticals, cosmetics, food fortification, and dietary supplements. As an esterified form of tocopherol, it offers superior oxidative stability, making it ideal for formulations requiring extended shelf life. It functions as a potent antioxidant, protecting cells from oxidative damage and supporting immune and skin health.
