Sodium Acetate Trihydrate

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Sodium Acetate Trihydrate is a white crystalline solid that is the hydrated form of sodium acetate. It is highly soluble in water and has a mildly alkaline pH in solution. Widely used in chemical, pharmaceutical, food, and textile industries, sodium acetate trihydrate serves as a buffering agent, pH regulator, and preservative. Its ability to stabilize pH and act as a neutralizing agent makes it valuable in various industrial and laboratory applications. Additionally, it is used for heat packs due to its exothermic crystallization properties.

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Category: Analytical Reagents Tags: Buffering agent, Food additive, Pharmaceutical industry, Sodium Acetate · 3H2O, Sodium Acetate Trihydrate, Trihydrate Salt

Description

Table of Contents

Sodium Acetate Trihydrate

Primary Uses

Food Industry

Acts as a food additive (E262) used as a flavoring agent and preservative in snack foods, condiments, and pickled products.
Serves as an acidity regulator to maintain pH stability in processed foods and beverages.

Pharmaceuticals

Used as a buffering agent in pharmaceutical formulations to stabilize pH.
Employed in oral rehydration solutions and intravenous fluids as a sodium source and pH balancer.

Chemical Industry

Functions as a buffering agent in chemical processes and analytical laboratories.
Used as a neutralizing agent in textile dyeing and printing to control pH during processing.

Heating Pads and Hand Warmers

Utilized in reusable heat packs and hand warmers due to its exothermic crystallization from supersaturated solutions.

Laboratory and Analytical Applications

Used as a buffer in electrophoresis, chromatography, and various biochemical assays.

Secondary Uses

Leather Industry

Employed in tanning processes to adjust pH and improve product quality.

Concrete Sealing and Corrosion Control

Used in certain concrete admixtures to improve curing and prevent corrosion.

Textile Industry

Applied in printing pastes and finishing to maintain alkaline conditions.

Cosmetics

Occasionally used in cosmetic formulations as a pH adjuster and buffering agent.

KEY PRODUCT FEATURES

1. Basic Identification Attributes

Chemical Name (IUPAC): Sodium acetate trihydrate
Common/Trade Name: Sodium Acetate Trihydrate
CAS Number: 6131-90-4
HS Code: 29152900
Synonyms: Acetic acid sodium salt trihydrate, Sodium ethanoate trihydrate

2. Physical & Chemical Properties

Physical State: Crystalline solid
Color & Odor: White crystals; slight vinegar-like odor possible
Melting Point: Approx. 58°C (dehydrates)
Solubility: Highly soluble in water (~76 g/100 mL at 20°C)
pH (1% aqueous solution): 8.5–9.0 (alkaline)
Density: Approx. 1.45 g/cm³

3. Safety & Hazard Attributes

GHS Classification: Generally regarded as non-hazardous; may cause mild skin or eye irritation
Toxicity: Low toxicity; ingestion in large quantities may cause gastrointestinal upset
Exposure Limits: No specific occupational exposure limits; follow general safety practices

4. Storage & Handling Attributes

Storage Conditions: Store in a cool, dry, well-ventilated area away from moisture and incompatible materials
Container Type: Supplied in sealed polyethylene or kraft paper bags
Shelf Life: Stable for 2–3 years if stored properly
Handling Precautions: Avoid dust generation; use gloves and eye protection when handling powder

5. Regulatory & Compliance Attributes

Complies with food-grade standards where applicable (FCC)
Meets pharmaceutical and chemical industry purity requirements
Complies with relevant environmental and safety regulations (REACH, OSHA)

6. Environmental & Health Impact

Biodegradability: Readily biodegradable and environmentally benign
Ecotoxicity: Low toxicity to aquatic organisms at typical use concentrations
Bioaccumulation: Not significant

SAFETY HANDLING PRECAUTIONS

Safety Handling Precautions

PPE Required: Gloves, goggles, and dust mask recommended when handling powder
Handling Guidelines: Use in well-ventilated areas; avoid inhaling dust and direct contact with eyes and skin
Storage Measures: Keep containers tightly closed and stored in a dry environment

First Aid Measures

Inhalation: Move to fresh air; seek medical attention if breathing difficulties occur
Skin Contact: Wash thoroughly with soap and water; seek medical advice if irritation develops
Eye Contact: Rinse eyes with plenty of water for at least 15 minutes; seek medical attention if irritation persists
Ingestion: Rinse mouth; do not induce vomiting; seek medical help if large amounts ingested

Firefighting Measures

Fire Hazards: Non-flammable and non-combustible
Extinguishing Media: Use water spray, foam, dry chemical, or CO₂ for surrounding fires
Special Precautions: Wear protective equipment and self-contained breathing apparatus if exposure to decomposition products occurs
Hazardous Combustion Products: May emit sodium oxides and acetic acid vapors on decomposition