Close
Shop All:Frey Scientific
Frey Scientific Reusable Heat Pack, 4 x 4 Inches
Item #:
1392320
$11.69
$8.77
In Stock - Typically Ships Within 2-3 Days
Free Shipping Eligible: Details
School Specialty Shipping Policy
Items Shipped Within the Contiguous 48 United States
Free Shipping Eligible Items
- Free shipping and handling on eligible supply orders of $69 or more. Free shipping calculation is based on the subtotals of eligible items, after any additional discounts are applied.
- For subtotals less than $69, the shipping and handling charge is $11.95.
Free Shipping Ineligible Items
- Shipping and handling charges are 20% of the subtotal of the items, after any discounts are applied, with a $11.95 minimum charge.
Free Shipping Ineligible Items
- Shipping and handling charges are 20% of the subtotal of the items, after any discounts are applied, with a $99 minimum charge. If the subtotal is greater than $1,000, please e-mail freight_quote@schoolspecialty.com for a freight quote.
Items Shipped to Hawaii, Alaska and International
See our Hawaii & Alaska Shipping Policy and International Shipping Policy for details.
Need to demonstrate how to create heat? These compact 4x4 inch heat packs are reusable making them a convenient and economical choice.
About This Item
Description
The heat pack contains a super saturated solution of water and sodium acetate. Snapping the metal disc creates a chain reaction causing the solution to supercool and crystallize. Because sodium acetate "freezes" at 130 degrees Fahrenheit, the process actually creates what we consider heat. The heat packs can be recharged back to the liquid state by boiling water for 10-15 minutes, making sure all crystals disappear, and allowed to slowly cool. Packs measure 4 x 4 inches.Features
- Shows how sodium acetate uses the process of supercooling to create heat
- Great for everything from muscle aches to scientific demonstrations
- Combines practical applications with a process that's fun to watch!
Includes:
- 1 Heat Pack
Shipping Type:
parcel
Free Shipping:
true
Specifications
Certifications:
Not Applicable
Maximum Age:
12 years
Allergens:
Contains No Allergens