Sodium acetate anhydrous
Sodium Acetate Anhydrous: High-Purity Industrial Grade Chemical
Sodium acetate anhydrous is a versatile chemical compound widely used in industries such as textile processing, food preservation, and pharmaceuticals. This white crystalline powder is known for its excellent buffering capacity and stability under various conditions.
Key Specifications
- Chemical Formula: CH3COONa
- Molecular Weight: 82.03 g/mol
- Appearance: White crystalline powder
- Purity: ≥99.0%
- Melting Point: 324°C (615°F)
- Density: 1.528 g/cm³
- Solubility: Highly soluble in water (119 g/100 mL at 0°C)
- pH (1% solution): 8.0-9.5
- Storage: Room temperature in tightly sealed containers
- Shelf Life: 36 months from production date
Technical Specifications
| Parameter | Specification | Test Method |
|---|---|---|
| Assay (as CH3COONa) | ≥99.0% | Titration |
| Loss on drying | ≤1.0% | Gravimetric |
| Chloride (Cl) | ≤0.005% | ICP-OES |
| Sulfate (SO4) | ≤0.005% | ICP-OES |
| Heavy metals (as Pb) | ≤0.001% | AAS |
| Iron (Fe) | ≤0.001% | AAS |
| Alkalinity (as NaOH) | ≤0.2% | Titration |
FAQ Section
What is the difference between sodium acetate anhydrous and sodium acetate trihydrate?
Sodium acetate anhydrous is the water-free form of sodium acetate, while the trihydrate version contains three molecules of water (CH3COONa·3H2O). The anhydrous form is preferred when moisture sensitivity is a concern in applications. The trihydrate form has lower molecular weight due to water content (136.08 g/mol compared to 82.03 g/mol for anhydrous) and different physical properties.
What are the primary industrial applications of sodium acetate anhydrous?
Sodium acetate anhydrous has numerous applications across industries. In the textile industry, it's used as a photoresist in dyeing processes. The food industry utilizes it as an acidity regulator (E262). Pharmaceutical applications include use as an electrolyte replenisher in dialysis solutions and as a component in heating pads. It also serves as a concrete sealant and plays important roles in various chemical synthesis processes.
Is sodium acetate anhydrous safe for food applications?
Yes, sodium acetate anhydrous is generally recognized as safe (GRAS) when used in accordance with good manufacturing practices. It's approved as food additive E262 in many countries including the US (FDA 21CFR184.1721) and EU (E262). Typical usage levels range from 0.1% to 0.3% in food products. However, food-grade specifications are more stringent than industrial grade, requiring additional purity tests for heavy metals and other contaminants.
Packaging Options
Sodium acetate anhydrous is available in multiple packaging formats to suit different customer needs:
- 25 kg multi-layer paper bags with inner PE lining
- 50 lb (22.7 kg) fiber drums with polyethylene liners
- 1000 kg bulk bags with moisture barrier
- Custom packaging available upon request
Safety Information
While sodium acetate anhydrous is generally considered safe, proper handling procedures should be followed:
- Wear appropriate PPE including gloves and safety glasses
- Avoid creating dust during handling
- Store away from strong acids and oxidizing agents
- In case of skin contact, wash thoroughly with water
- For eye contact, rinse immediately with plenty of water for at least 15 minutes
Additional Features
- Non-toxic and biodegradable
- Excellent buffering capacity between pH 4-6
- Low environmental impact
- Compatible with most common industrial materials
- Consistent batch-to-batch quality
Sodium acetate anhydrous remains one of the most versatile and widely used chemicals in various industrial processes. Its combination of safety, effectiveness, and cost-efficiency makes it indispensable for many applications.