supercooled sodium acetate
CAS NO.: 6131-90-4
Molecular Formula: CH₃COONa·3H₂O
Molecular Weight: 136.08 g/mol
Character: Sodium acetate trihydrate can form a clear supersaturated or supercooled liquid after heating and controlled cooling. The liquid may remain below its normal crystallization temperature without solidifying until crystallization is initiated. Once nucleated, it rapidly crystallizes and releases stored heat.
Working Principle: Heating melts or dissolves the hydrated crystals to form a supersaturated solution. After cooling without disturbance, the solution remains in a metastable liquid state. Mechanical activation or addition of a seed crystal triggers crystallization and releases latent heat.
Usage: Commonly used in reusable heat packs, hand warmers, thermal energy storage systems, laboratory demonstrations, phase-change materials, and temperature-control applications.
Package: Available in sealed heat-pack containers, drums, intermediate bulk containers, or customized packaging according to the application.
Storage: Store in a sealed container in a dry and clean environment. Avoid accidental activation, package damage, contamination, excessive heat, and freezing conditions that may affect product performance.
- Product Description
Supercooled Sodium Acetate Solution | Reusable Heat Pack Material & Phase-Change Thermal Storage
Shanxi Zhaoyi Chemical Co., Ltd. is a manufacturer that specializes in thermal storage phase-change materials. We have been at it since 1988, which adds up to more than 35 years of production experience. Our production base covers 27,000 ㎡. Every year it turns out 150,000 tons of acetate series products. Our supercooled sodium acetate (sodium acetate trihydrate) was developed with reusable heat packs and thermal energy storage in mind. Held below the usual crystallization temperature, it keeps a stable metastable liquid state. After activation it releases as much as 264 kJ/kg of latent heat. Portable heating equipment uses it, and so do precise temperature control systems. Buyers in industrial and consumer markets worldwide trust it.
Key Features & Benefits
Our this product solution gives you heat release that is fast and easy to control. Below crystallization temperature the product stays liquid and stable. Mechanical activation is the only thing that sets off the rapid solidification and the heat that comes with it. Phase change runs in reverse too, so repeated use is no problem. Boil the cured solid and the supercooled state returns. Nothing is wasted, and cost performance stays high. Past 200 activation cycles, heat output still holds steady. Commercial hand warmer production and laboratory teaching experiments get consistent quality because of that. The raw materials are non-toxic and food-grade, which makes direct skin contact safe. End users face no hidden chemical risks.
Technical Specifications
Parameter | Specification |
|---|---|
Chemical Name | Sodium Acetate Trihydrate (Supercooled Grade) |
CAS Number | 6131-90-4 |
Molecular Formula | CH₃COONa·3H₂O |
Molecular Weight | 136.08 g/mol |
Appearance | Clear, colorless supersaturated liquid |
Crystallization Temperature | Typically 54–58°C upon activation |
Latent Heat Release | 264 kJ/kg (approximate) |
Purity | ≥99.0% |
pH Value (10% solution) | 8.0–9.5 |
Melting Point | 58°C (trihydrate form) |
How It Works
Controlled supersaturation technology is what makes this product work. Heat the trihydrate crystal raw material past 58°C and it dissolves completely into one even solution. Cooling it carefully, without any disturbance, leaves a stable metastable liquid. Latent heat is held inside, and no crystals form on their own. Then comes a mechanical trigger. Press a metal disc, or drop in seed crystals, and nucleation starts at once. Seconds later the whole solution has crystallized and the stored latent heat is out. Ambient temperature climbs to about 54°C. Warm the solidified product again and the phase flips back to the supercooled liquid. Cycle after cycle, thermal performance stays steady.
Applications
This product covers diversified commercial and industrial scenarios: Personal heating products including hand warmers and therapeutic heat wraps for outdoor cold protection; industrial thermal storage for building temperature control and solar energy heat recovery; laboratory teaching for supersaturation and exothermic crystallization demonstration; medical fields for physical heat therapy and biological sample insulation; catering industry for portable food and beverage constant temperature maintenance.
Supercooled Sodium Acetate vs Other Heat Sources
Feature | Supercooled Sodium Acetate | Disposable Chemical Warmers | Electric Heaters |
|---|---|---|---|
Reusability | 200+ cycles | Single-use only | Unlimited (requires power) |
Activation Speed | Instant (2–5 seconds) | 5–10 minutes | 30+ seconds |
Environmental Impact | Zero waste after initial purchase | High waste generation | Energy consumption |
Portability | Fully portable, no power needed | Fully portable | Requires power source |
Safety Profile | Non-toxic, food-grade | May contain iron powder/chemicals | Electric shock risk |
Cost per Use | $0.05–0.10 | $1.00–2.00 | $0.20–0.50 (electricity) |
Certifications & Compliance
Our factory is ISO 9001 certified for quality management. That keeps product performance steady from one batch to the next. The formula is food grade and meets international safety rules, so it can touch human skin and go into consumer end products. We run tight quality checks at every step of the process. For each batch we hand over full compliance paperwork. Those documents help with customs clearance and market access around the world.
Packaging Options
We supply professional packaging for supercooled sodium acetate in several sizes. For retail sales, there are pre-sealed consumer heat pack pouches in 50g, 100g and 200g, and each one holds a built-in metal activator. Manufacturers who buy in bulk can pick 25kg lined drums or 50kg woven bags. For large-scale continuous industrial production, we ship 500kg IBC tanks and 1000kg bulk sacks. Packaging can also be made to match your real production and logistics needs.
Manufacturing Process
We use an integrated production method. The raw materials are high-purity acetic acid and sodium carbonate. A controlled neutralization reaction gives us the sodium acetate base liquid. Precise ratio control, plus multi-stage impurity filtration, removes the particles that cause early crystallization. That is what keeps the supercooling stable. Every batch goes through strict thermal cycle testing, so it holds up for more than 200 reuse cycles. Filling runs on automated closed lines. This keeps contamination out and product quality even.
Why Choose Us
Benefit from our 35+ years of professional acetate manufacturing experience and professional technical team. Our 150,000-ton stable annual capacity completely avoids your production shortage risks. With mature global logistics networks covering Europe, America and Asia, we deliver goods on schedule with complete customs documents. We provide one-stop technical support including formula optimization and application debugging to help clients improve product competitiveness.
FAQ
Q: How many times can This product heat pack be reused?
A: A1: Heat it and store it the normal way, and you can reuse the pack over 200 times. Each run gives off steady heat, and we see no clear drop in how well it works.
Q: What activation temperature can this product reach?
A: A2: After activation, the temperature stably rises to 54-58°C, with continuous heating duration of 30 to 60 minutes, varying by product size.
Q: Is the product safe for daily consumer products?
A: A3: Yes. The formula is food grade and non-toxic, so it can touch skin directly. Because the pack is sealed, the contents stay inside, which lowers the chance of leaks or of anyone swallowing them. That makes it fine for children and for everyday heating products.
Q: How to restore the product to liquid state after use?
A: A4: Soak the solidified heat pack in boiling water for 5-10 minutes until fully liquefied, then cool naturally without external disturbance for next use.
Q: Can you customize exclusive formulas for special scenarios?
A: A5: Sure. We support personalized customization of activation temperature, heat release duration and cycle performance to match your application requirements.
Request a Quote
If you are looking for high-stability supercooled sodium acetate for thermal storage please contact our professional sales team via sxzy@sxzhaoyi.com to obtain targeted quotations, and free product samples.
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