Sodium Chloride
Bulk Order Factory Price Crystalline Hign Pure Salt Natrium Sodium Chloride for Sale
Product Name: Sodium Chloride
CAS No.: 7647-14-5
EINECS No.: 231-598-3
Molecular Formula: NaCl
Molecular Weight: 58.44 g/mol
Hazardous Goods Code: Non-hazardous
UN Number: Not applicable
Product Classification: Edible Salt, Iodized Salt, Sea Salt, Rock Salt
Hazardous Chemical Classification: Non-hazardous
Packaging Specification: 25kg/50kg bags
CERTIFICATES
Bulk Order Factory Price Crystalline Hign Pure Salt Natrium Sodium Chloride for Sale
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Appearance and Properties:
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Food Grade: White, crystalline solid, typically fine or coarse granules. Odorless with a characteristic salty taste.
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Industrial Grade: White or off-white crystals or powder. May contain visible impurities. Odorless.
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Feed Grade: White to off-white granules or powder. Essentially odorless.
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Key Physical Parameters:
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Relative Density (water = 1): ~2.16 g/cm³
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Melting Point: 801 °C
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Boiling Point: 1465 °C
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Solubility: Highly soluble in water (35.7 g/100 mL at 20°C). Solubility is relatively unaffected by temperature. Insoluble in most organic solvents.
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Chemical Stability: Stable under normal temperatures and pressures. Hygroscopic (absorbs moisture from air). Reacts with strong acids releasing hydrogen chloride gas. Can promote corrosion.
III. Core Production Processes
| Process Type | Raw Materials | Core Process Flow | Product Characteristics |
|---|---|---|---|
| Solar Evaporation (Food/Feed) | Seawater, Salt Lake Brine | Reservoir Concentration → Crystallization → Harvesting → Washing → Drying → Iodization/Fortification (if needed) | Natural, cost-effective for large-scale production. Product purity depends on source and washing. |
| Vacuum Evaporation (Food/High-Purity Industrial) | Underground Brine, Washed Rock Salt | Brine Purification → Evaporation under Vacuum → Centrifugation → Drying → Screening | High purity, uniform crystal size, low moisture content. Suitable for iodization. |
| Mining & Processing (Industrial/Feed) | Rock Salt Deposits | Mining → Crushing → Screening → (Anti-caking agent addition for Industrial) | Lower cost, suitable for high-volume industrial applications (de-icing, chemical feedstock). |
IV. Quality Standards (Key Indicative Specifications)
| Test Item | Food Grade (GB 2721) | Industrial Grade (Typical) | Feed Grade (Typical) |
|---|---|---|---|
| Sodium Chloride (NaCl) Content ≥ | 97.0% (Refined) | 95.0 - 99.5% | 95.0 - 98.5% |
| Water Insolubles ≤ | 0.1% | 0.5 - 1.0% | 0.5 - 1.5% |
| Calcium & Magnesium Ions (as Ca) ≤ | 0.3% | Varies | Varies |
| Sulfate (as SO₄) ≤ | 0.4% | Varies | Varies |
| Heavy Metals (as Pb) ≤ | 2 mg/kg | Not Specified | 10 - 30 mg/kg |
| Iodine (in Iodized Salt) | 21-39 mg/kg | Not Applicable | Not Applicable (or as specified) |
| Additives | Anti-caking Agents (e.g., Sodium Ferrocyanide) permitted | Anti-caking Agents (e.g., Ferrocyanides) | Mineral Pre-mixes (e.g., Zn, Fe, Cu) |
Data Source: National Standards (e.g., GB for China), Industry Specifications.
V. Main Application Areas
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Food Grade Salt:
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Human Consumption: Direct seasoning, food preservation, baking, and cooking.
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Food Processing: Essential ingredient in the production of cheese, butter, pickled foods, and meat products.
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Industrial Grade Salt:
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Chemical Industry: Primary raw material for the production of chlorine, caustic soda (sodium hydroxide), and soda ash (sodium carbonate).
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Water Softening: Used in ion-exchange resins to remove calcium and magnesium ions.
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De-icing: Spread on roads and walkways in winter to lower the freezing point of water.
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Other: Used in textile dyeing, leather tanning, and as a drilling mud additive.
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Feed Grade Salt:
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Animal Nutrition: Essential dietary component for livestock, poultry, and aquaculture to maintain fluid balance, nerve function, and appetite.
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Mineral Carrier: Often used as a carrier for trace mineral pre-mixes (e.g., zinc, iron, copper) in animal feed.
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VI. Safety and Handling (Summary)
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Food Grade: Safe for human consumption according to regulations. Excessive intake is linked to health issues.
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Industrial Grade: Can be irritant to eyes, skin, and respiratory system. May be corrosive in solid form. Environmental impact (e.g., soil/water salinization) must be considered, especially for de-icing.
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Feed Grade: Formulated for animal consumption. Generally safe for handling. Must be stored separately from industrial chemicals.
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General Handling: Store in a cool, dry, and well-ventilated place. Protect from moisture. Use appropriate personal protective equipment (PPE) like gloves and dust masks when handling large quantities, especially industrial grade.
