Hielo seco por aire: 2025 Cumplimiento, Apresto & Sops
Si envía productos congelados, dry ice via air remains the fastest, most reliable way to hold ≤ −18 °C in transit. En 2025 you’ll pass acceptance by venting the package, calificación UN1845 with net kilograms, applying a Clase 9 etiqueta, and adding the correct En Waybill (AWB) entries. Plan 5–10 lb/día of dry ice for small shippers and remember the 2.5 kg passenger y 5 lb USPS air limits. This guide blends regulation, field practice, and carrier nuance you can apply today.
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What does dry ice via air require in 2025? (PI 954, UN1845, Clase 9, kg neto, AWB order)
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How much should you pack for 24–72 hours? (5–10 lb/day rule + physics‑based check)
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How do you pack, etiqueta, and document to pass acceptance? (10‑minute SOP)
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What are passenger and postal limits? (2.5 kg baggage, 5 lb USPS air)
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When to choose dry ice vs. Gel? (decision tool for lanes and temperatures)
What does dry ice via air exigir 2025?
Respuesta central: Use packaging that vents CO₂, mark the proper shipping name ("Hielo seco" o "dióxido de carbono, sólido") con UN1845 y el masa neta de hielo seco (kilos) on each package, y aplicar un Clase 9 etiqueta. Para la carga, the AWB must show UN1845 → proper name → package count → net kg in that order. Airlines increasingly collect net kg at booking to manage aircraft CO₂ limits. Seguir el 2025 acceptance checklist to avoid refusals.
Por qué esto importa (expanded): “Vented” means never sealing dry ice in airtight liners; pressure from sublimating CO₂ can rupture packaging. Operators and integrators review UN number, nombre, Kg neto, and hazard label during acceptance, and many ask for net kg during booking. Keep baggage rules separate: 2.5 kg por pasajero is not a cargo limit; cargo follows PI 954 y variaciones del operador. Craft two micro‑SOPs if teams sometimes travel with samples and sometimes tender freight—one for carga and one for equipaje.
How to mark UN1845 and Class 9 para dry ice via air
Lugar UN1845 and the proper name on the same face as the Clase 9 label when space allows. Keep the 100 mm diamond unobstructed—don’t write inside it. Print Kg neto per package clearly; if you use an overpack, repeat or aggregate the total net kg on the overpack. Most carriers align on these details and may specify minimum font size or label placement, so train packers to apply marks consistently before tender.
| AWB & Package Requirement | What to Write | Where it Goes | Why it Matters |
|---|---|---|---|
| Número de la ONU | UN1845 | Paquete & AWB | Identifies dry ice as Class 9 DG |
| Nombre propio | hielo seco / Dióxido de carbono, sólido | Paquete (same face as Class 9 when possible) | Standardizes hazard communication |
| masa neta | X kg por paquete | Paquete (and overpack total if used) | Aircraft CO₂ load management |
| Etiqueta de peligro | Clase 9 (100 mm) | Package exterior | Acceptance checkpoint; keep unobscured |
Practical tips you can use now
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Never seal liners: Use vent‑friendly pouches or leave liners open.
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Capa de manera inteligente: Bottom pouch → product → top pouch; add sides for 48–72 h lanes.
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Condición previa: Hard‑freeze product; pre‑chill the shipper to cut early loss.
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Book with numbers: Have net‑kg por paquete ready during booking.
Caso del mundo real: A confectioner split 10 lb into two pouches, printed UN1845 with net kg on the same face as Clase 9, added the AWB entries in order, and cleared acceptance on the first attempt—even with a connection delay.
Cuánto dry ice via air ¿Necesitas 24–72 horas??
Short rule: Comenzar con 5–10 lb (2.3–4.5 kg) por 24h para un pequeño (≈10–20 L) cargador aislado. Use the higher end for hot lanes, frequent door‑opens, or lower‑R insulation. Validate with a quick lane test and add a “delay day” if your route stalls.
Physics check (to right‑size): Dry ice’s cooling capacity comes from its sublimation energy (~571 kj/kg). If you estimate your shipper’s hourly heat leak, you can compute a minimum dry‑ice mass and then add 10–20% buffer.
Quick sizing table (10–20 L shipper)
| Duración | Leve (≤22 ° C) | Cálido (23–30 ° C) | Caliente (≥31 ° C) | Lo que significa para ti |
|---|---|---|---|---|
| ~ 24h | 2–3kg | 3–5 kg | 5–6 kg | Split into ≥2 pouches for surface coverage |
| ~ 48h | 4–6 kg | 6–8 kg | 8–11 kg | Add a thin −20 °C PCM at product face |
| ~ 72h | 6–8 kg | 9–12 kg | 12–15 kg | Consider higher‑R insulation or a larger box |
Cómo empacar, etiqueta, y documentar dry ice via air (PI 954)?
10‑minute SOP (imprimible):
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Congelar & escenario: Product ≤ −18 °C; pre -chill el remitente.
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Bolsa & split: Load dry ice into vent‑friendly pouches; split into two or more.
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Capa: Bottom pouch → payload → top pouch; fill voids lightly.
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Desfogue: Close securely but no make airtight.
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Marca & etiqueta: UN1845, nombre propio, Kg neto, Clase 9 on same face when size allows.
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Sobresalto (Si se usa): Show total net kg on the overpack.
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Entradas AWB: UN1845, nombre propio, recuento de paquetes, Kg neto (in that order).
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Book with net kg: Operators may check aircraft‑type limits before acceptance.
Pasajero & postal limits for dry ice via air—what changes on baggage and mail?
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Equipaje de pasajeros: With airline approval you may carry ≤2.5 kg (5.5 lb) por pasajero, in vented packaging marked “Dry ice/Carbon dioxide, solid” and showing net quantity. This rule does no apply to cargo.
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Correo aéreo de USPS: ≤5 lb por correo under Packaging Instruction 9A; package must vent.
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Domestic ground (A NOSOTROS.): Dry ice alone is generally not regulated, but you still must vent and protect handlers from CO₂ exposure. Keep your dry ice via air SOP separate from ground rules.
Dry ice via air or PCM/gel—how should you choose?
Use dry ice via air when any two are true:
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Tiempo de tránsito > 36 h
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Ambient peaks ≥ 30 °C
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Product must stay ≤ - 18 ° C (no partial thaw)
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Operator accepts UN1845 on your service
If not, trial a −20 °C or +5 °C PCM (phase‑change material) with higher‑R insulation to reduce DG handling and simplify acceptance.
Interactive self‑check (anotar)
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Packaging vents CO₂ (yes = 1)
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Clase 9 label unobscured (yes = 1)
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UN1845 + nombre propio + Kg neto printed (yes = 1)
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AWB entries in order (yes = 1)
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Overpack shows total net kg (Si se usa) (yes = 1)
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Net kg provided at booking (yes = 1)
Score 5–6: flight‑ready. Score ≤ 4: fix gaps before tender.
2025 acontecimiento & tendencias en dry ice via air
Qué hay de nuevo: El 2025 cycle tightened the practical expectation to provide net dry‑ice kg during booking so operators can check aircraft CO₂ limits. Carriers refreshed acceptance job aids (label size/placement; No escribas dentro del diamante). Many brands now pair a thin −20 °C PCM at the product face with perimeter dry ice to reduce DG mass while damping door‑open spikes.
Último de un vistazo
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Booking data matters: Net kg collected up front to validate aircraft limits.
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Operator checklists updated: Emphasis on UN1845, net‑kg marks, and clear Class 9 colocación.
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Paquetes híbridos: Small PCM layer + dry ice → fewer spikes without sacrificing frozen integrity.
Insight del mercado (palabras claras): Expect continued growth in frozen lanes and greater use of validated shippers, loggers, and printable SOPs so teams can train in minutes and pass acceptance reliably.
Preguntas frecuentes
Do I need a Shipper’s Declaration for dry ice via air?
Not when dry ice only refrigerates non‑dangerous goods. You must still mark the package (UN1845, nombre propio, Kg neto), Aplicar clase 9, and add the AWB entries in order. Use the acceptance checklist to self‑audit.
How much dry ice via air for 48 horas?
Plan 10–20 lb for a small insulated shipper, increasing toward 20 lb for hot lanes or frequent door‑opens, then tune via a lane test.
What’s the per‑package limit for cargo?
Carrier job aids commonly reference ≤200 kg net dry ice per package under PI 954; aircraft‑level limits can also apply. Confirm operator variations if you approach high masses.
Can I use dry ice via air for food shipments?
Sí. Para alimentos congelados (p.ej., helado) Use hielo seco; for 2–8 °C groceries, switch to PCM/gel to avoid DG handling. Keep packaging vented either way.
What causes most acceptance failures?
Airtight inner liners and missing Kg neto marcas. Keep dry ice unsealed and print net kg on each package (and overpack).
Resumen & recomendaciones
Final: To fly dry ice via air, ventilar el paquete, marca UN1845 with the proper name and Kg neto, aplicar Clase 9, and complete the AWB in order. Size refrigerant at 5–10 lb/día, validate on your lane, and provide net kg at booking. Keep baggage/postal rules separate.
Siguientes pasos:
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Print labels and a one‑page acceptance checklist. 2) Run one lane test and tune dry‑ice kg by ±10–20%. 3) Add a thin −20 °C PCM at the product face for hot lanes. 4) Train packers on venting, PPE, and AWB entries.
Suggested internal links (anchor text)
Visual aids
Acerca de Tempk
Diseñamos dry ice via air packouts that pass acceptance and protect payloads. Our planners combine validated shippers, PI 954‑ready labels, and lane‑based sizing to reduce claims and speed onboarding with carriers. Clients choose us for fast SOPs, practical training, and support that scales from pilot to nationwide distribution.
CTA: Comparte tu carril, masa de carga útil, and box size—get a tailored packout spec and a one‑page acceptance audit you can train in under 15 minutos.
