sodium acetate 3 hydrate
CAS NO.: 6131-90-4
Molecular Formula: CH₃COONa·3H₂O
Molecular Weight: 136.08 g/mol
Character: White or colorless crystals with good water solubility and hygroscopic properties.
Usage: Suitable for buffer preparation, textile dyeing, pharmaceutical manufacturing, electroplating, laboratory use, and wastewater treatment.
Package: 25 kg plastic woven bag or 1000 kg ton bag.
Storage: Keep dry and sealed, away from heat and strong oxidizing agents.
- Product Description
Sodium Acetate 3 Hydrate | High-Purity Industrial & Food-Grade Solution | Reliable Buffer & Treatment Agent
Back in 1988, Shanxi Zhaoyi Chemical Co., Ltd. got going. Acetate series products are the line we work on. A standardized plant spreads across 27,000 ㎡ and puts out 150,000 tons every year. Its formula reads CH₃COONa·3H₂O. Molecular weight comes to 136.08 g/mol. Our sodium acetate 3 hydrate (CAS: 6131-90-4) carries a trihydrate crystal structure that holds firm. Food preservation is one field that leans on this chemical. Textile dyeing and pharmaceutical production need it as well. So does wastewater treatment. Uniform white crystals are what you see. Water dissolves it easily, and crystal water accounts for about 40% of it. Industrial and food production lines use it as a reliable pH buffer and treatment agent. Batch to batch, performance does not shift, and rules from regulators worldwide are satisfied. ISO, KOSHER, and HALAL certifications stand behind it.

Key Features & Benefits
Stable hygroscopic performance: Ambient conditions are enough for this Sodium Acetate 3 Hydrate. Its physical properties hold steady through everyday storage and shipping. No special constant humidity equipment is needed. That trims your storage and logistics costs by a large margin.
Fast dissolution efficiency: The crystals are built in a way that lets the material break down fast in any system that uses water. Batching and prep take less time. Lines don't sit idle anymore. That makes the whole operation run better.
Wide industrial adaptability: It fits many uses. At a sewage plant, it can add carbon sources for biological treatment. In a lab, it can keep pH steady. One product can stand in for several chemicals. That makes buying and storing supplies much simpler.
High cost performance: Buyers pay less for the trihydrate form than for anhydrous sodium acetate. Results from the two are the same in traditional industrial work. Your budget then stretches further. Output does not drop.

Technical Specifications
Parameter | Specification |
|---|---|
Chemical Formula | CH₃COONa·3H₂O |
CAS Number | 6131-90-4 |
Molecular Weight | 136.08 g/mol |
Appearance | White or colorless crystals |
Moisture Content | Approximately 40% |
Water Solubility | Highly soluble |
pH (5% solution) | 8.0: 9.5 |
Purity | ≥ 98.0% (food-grade available) |

How It Works
This product dissolves in water and splits into ions. It stays stable the whole time. After that split, acetate ions remain. These ions keep the pH steady and take in extra hydrogen ions from the solution. The outcome is precise buffering control.
In sewage treatment, acetate ions work as a carbon source that breaks down by itself. Heterotrophic bacteria eat them, and that pushes the denitrification cycle forward. Nitrate in the wastewater then becomes nitrogen gas. A low C/N ratio is a frequent problem in municipal and industrial sewage, and this fixes it. Companies can then stay below their total nitrogen discharge limits.
In food processing, it creates a stable pH buffer that stops microbes from growing. Bacillus subtilis growth is blocked, but normal yeast fermentation is not touched. Rope spoilage in baked goods stops because of this. Food safety is guaranteed, and products last longer.
Applications
- Wastewater treatment: A useful extra carbon source for biological denitrification. Sewage plants get denitrification that works better and holds steady. Tight limits on nitrogen discharge then become easier for them to meet.
- Textile and Dyeing Industry: Dye binds evenly to the cloth. Color barely shifts from one production batch to the next. Bath pH is adjusted with accuracy and stays where it was set.
- Pharmaceutical Manufacturing: Drug makers rely on it as a professional buffering agent inside their formulations. Therapeutic effects hold steady right through the product's shelf life. Chemical stability of the finished medicine is preserved too.
- Electroplating shops get a more even coating and a better surface finish. The acidity of metal finishing baths can be held right where it should be. Chemical conditions for surface treatment improve as well.
- Food Processing Industry: Bakeries and drink makers use it a lot. It keeps germs down and gives products a longer shelf life. Clean label rules are easier to meet with it. It also complies with the E262i rules for a food-grade acidity regulator.
Sodium Acetate 3 Hydrate vs Other Products
Feature | Sodium Acetate 3 Hydrate | Anhydrous Sodium Acetate | Methanol (Carbon Source) |
|---|---|---|---|
Moisture Content | ~40% | ≤0.5% | N/A |
Storage Requirements | Standard dry storage | Strict moisture-proof | Flammable storage |
Cost Efficiency | Higher | Moderate | Lower |
Safety Profile | Non-toxic, non-flammable | Non-toxic, hygroscopic | Toxic, flammable |
Dissolution Speed | Pre-dissolution may be needed | Instant | Immediate |
Food-Grade Availability | Yes | Yes | No |
Certifications & Compliance
Standard Quality System: The whole production process strictly complies with ISO quality management system standards, realizing full-process quality control and batch stability guarantee.
Food Safety Certification: Valid KOSHER and HALAL certificates come with food-grade Sodium Acetate 3 Hydrate. So the entry rules for food-grade use around the world are met.
Complete Compliance Documents: We provide full set of qualification documents to support customer's regulatory audits in food safety, pharmaceutical production and environmental protection industries.

Packaging Options
- Standard Industrial Packaging: Pallet packaging arrives in 25 kg woven bags. Inside every bag there is a moisture-proof lining. Warehouse space gets saved, and stacking plus shipping becomes easier.
- Large-Volume Bulk Packaging: 1000 kg ton bags have discharge spouts. They work well for continuous large-scale production. That means less packaging waste and less time spent on manual handling.
- Customized Packaging Service: We help build packaging that fits the automated feeding system and the way the customer stores the goods. Our technical team can then work out answers aimed right at your case.

Manufacturing Process
Our mature and integrated production process ensures stable product purity and crystal structure of sodium acetate 3 hydrate, with strict control of every link:
Raw Material Reaction: Adopt high-purity acetic acid and sodium raw materials for precise neutralization reaction to ensure sufficient reaction and reduce impurity generation.
Controlled Crystallization: Programmed cooling crystallization is the method used here. The result is trihydrate crystal particles that come out even. Water content structure also holds steady.
Impurity Removal & Dehydration: Tiny impurities get removed through several filtration stages. A centrifuge then pulls the water out. Product dryness stays steady that way.
Precision Drying & Testing: Drying happens at a constant temperature. That keeps the standard trihydrate crystal water in place. Every batch goes through strict testing before delivery. It must meet international specification standards.
Why Choose Us
35 Years of Manufacturing Experience: Acetate product R&D and production have been our focus since 1988. The years add up. They give us stable product quality and mature application solutions.
Sufficient Stable Supply: Every year we turn out 150,000 tons. That covers small trial batches and big bulk orders just as well. Shortages and late deliveries do not happen.
Global Logistics Service: Our cross-border logistics network is mature. It reaches Europe, America, Asia and other regions. Customers around the world get steady delivery and full customs clearance documents.
Professional Technical Team: Sixty people work on our technical team. Support from them is one-stop. They help pick the right product, guide the dosage, and suggest on-site ways to improve your process.
Full-Process Quality Control: Raw materials come in. Packed goods go out. Every step in between runs inside our own plant. That vertically integrated setup keeps quality traceable and the paperwork compliant.

FAQ
Q: What really makes trihydrate and anhydrous sodium acetate different?
A: A1: Crystal water makes up roughly 40% of sodium acetate hydrate. It sells for less, and tight moisture-proof storage is not something you have to worry about. Most industrial jobs and food uses handle it just fine. The anhydrous kind holds almost no water at all. Water-sensitive chemical synthesis is where that one fits. You will pay more for it, though.
Q: Can this food-grade product be used for organic food production?
A: A2: KOSHER and HALAL standards are both met by our food-grade sodium acetate trihydrate. Ask your local organic certification institution about the exact usage specifications. Your real production scenarios decide the rest.
Q: How long is the product good for in storage, and does it still work the same at the end?
A: A3: Store it in a cool spot. Keep it sealed and dry, away from heat and from oxidants. Under those conditions it holds its performance for over 24 months. For a specific use, go by the shelf life printed on the package.
Q: How do you work out the right dose for wastewater treatment?
A: A4: The conventional dosage ranges from 100-300mg/L. The most suitable dosage can be obtained through beaker tests according to the actual COD and TN ratio of on-site sewage water quality.
Q: Can you provide customized products and packaging?
A: A5: Yes, we support personalized customization of product indicators and packaging specifications to meet the differentiated production needs of different industries and customers
Request a Quote
Are you looking for Sodium Acetate 3 Hydrate? It might be for wastewater treatment, Another job is possible too. Send a message to sxzy@sxzhaoyi.com.


