laboratory disposables - cold transportation - Rigid frozen pack -21º C, 900ml, red, 180x143x36mm, 753gr, the thermal -21º C frozen pack is a high-density polyethylene product that uses eutectic gel to guarantee maintenance of negative temperatures in frozen products at -21º C and with autonomy of up to 4 days. The ideal substitute for dry ice: Phase change occurs at -21º C, maintaining this temperature over long periods (up to 96 hours, depending on the exterior packaging selected). In contrast to dry ice, which is considered a hazardous product and its use is extremely restricted in air transport, our freeze cold packs are fully suitable for food transport (non-toxic gel that does not stain in the event of rupture). Resistance and stability: The rigid HDPE thermal cold pack offers excellent performance in terms of resistance to breakage and compression, guaranteeing gel resilience and stability in the event of rupture (anti-leaking). Furthermore, the gel itself prevents the cold pack from buckling. Uses: Transport of pharmaceutical products and chemical, pharmaceutical and biological samples. Together with the isothermal containers (PU, Lipcontainer, EPS, etc.) these cold packs constitute the most comprehensive solution for cold chain logistics with negative temperatures at -21º C. Advantages: Temperature can be maintained at -21º C up to 96 h. Substitute for dry ice, considered a hazardous substance in some transports. Approved for use and contact with food. High-density rigid polyethylene prevents breakages. Easy to use and handle. Can be taken directly from the freezer. Can be placed next to the product for sending. Reusable. Non-toxic. Non-stain, ( KF900N), code 1-10137/RFP900