What Is the Maximum Dry Ice Allowed per Package?

ال maximum dry ice allowed per package depends on mode and operator: air cargo typically permits 200 كجم هنا هنا 954, passenger baggage allows 2.5 كجم, and USPS domestic air caps 5 رطل. You’ll stay compliant by venting CO₂, وضع العلامات UN1845, and stating net weight in kilograms. يمنحك هذا الدليل قواعد بسيطة, a calculator, and pack‑out checklists to avoid rejection and keep products safe.

Fast limits: ال maximum dry ice allowed per package by air cargo, أمتعة الركاب, USPS, and ground.
Compliance essentials: تسميات, علامات, and venting that pass acceptance checks.
آلة حاسبة: Convert dry ice to CO₂ gas and right‑size pack‑outs for your route and hold time.
Carrier nuances: When operators lower the ceiling and how to plan for it.
Real‑world tips: Vaccine kits, المأكولات البحرية, and e‑commerce scenarios that ship cleanly.

How is the maximum dry ice allowed per package set in 2025?

إجابة قصيرة: البضائع الجوية packages are typically limited to 200 كجم تحت بي 954; أمتعة الركاب يكون 2.5 كجم (5.5 رطل) per person/package with airline approval; USPS domestic air يكون ≤5 رطل لكل بريد; أرضي follows 49 CFR exceptions and operator rules. تنفيس, “UN1845” marking, صافي كجم, والطبقة 9 تسميات are non‑negotiable.

ال maximum dry ice allowed per package reflects safety in enclosed spaces. Dry ice sublimates to CO₂; in aircraft holds this can displace oxygen and raise pressure. Operators therefore enforce per‑package caps and sometimes per‑flight totals. Ground networks rely on venting and marking rather than a single national number. Always confirm operator variations before packing.

ها هو بي 954: maximum dry ice allowed per package for air cargo

Under PI 954, you can load up to 200 كجم per package when packaging releases CO₂, يكون strong, and is correctly labeled. Airlines may set a lower ceiling by aircraft or route. For baggage, ال 2.5 كجم personal limit protects passengers and crew. USPS domestic air mail caps dry ice at 5 رطل لكل قطعة; heavier amounts must go surface/ground.

2025 quick limits by mode	Standard cap	Core compliance	ماذا يعني لك
البضائع الجوية (باي 954)	200 كجم	تغليف التهوية; UN1845; فصل 9; شبكة كجم	Design shipper and AWB to PI 954; verify operator caps
أمتعة الركاب	2.5 كجم pp	موافقة شركات الطيران; تنفيس; mark “Dry ice” and weight	Small personal perishables only
USPS domestic air	5 رطل	حانة 52 قواعد; تنفيس; علامات	Keep mailpieces ≤5 lb or switch to ground
نحن. أرضي (49 CFR)	Exception ≤2.5 كجم; >2.5 kg allowed with added rules	تنفيس; علامات; carrier acceptance	Flexible but still regulated, especially in enclosed vans

Practical tips and suggestions

Pharma kit (36-72 ح): Use VIP shippers; aim 10–20 kg per package—well below the maximum dry ice allowed per package yet long‑lasting.
E‑commerce frozen foods (48 ح): Choose faster service + thicker EPS to stay under USPS 5 رطل air cap.
Passenger travel (seafood/meds): علية ≤2.5 كجم في برودة تنفيس; قم بالإعلان عند تسجيل الوصول.

مثال على ذلك: A vaccine lane reduced rejections by switching to pre‑printed PI 954 labels and logging صافي كجم on the AWB. Acceptance time dropped, and cold excursions fell on the route’s hottest month.

How do you calculate the maximum dry ice allowed per package safely?

فكرة أساسية: 1 كجم dry ice → ~541 L CO₂ gas at STP. Right‑size dry ice so expected gas fits your package’s venting capacity and the operator’s per‑package limit. ال maximum dry ice allowed per package should never exceed either your vent capacity or the regulatory ceiling.

Use this simple two‑step method from the shipper’s perspective. Keep sentences short. Use round numbers.

Estimate gas volume: dry ice (kg) × 541 = CO₂ liters.
Check venting: Your packaging should safely relieve that gas over the trip. If not, reduce dry ice أو upgrade insulation.

تنفيس co₂, وضع العلامات, and documentation behind the limit

تنفيس: Never seal liners airtight. Lids must lift or vent.
وضع العلامات: مطبعة "ثاني أكسيد الكربون, صلب (الجليد الجاف), UN1845 " و صافي كجم على المربع الخارجي.
ملصق: يتقدم فصل 9 hazard diamond; keep the net kg outside the diamond border.
مستندات: For air cargo, يشمل UN1845 و صافي كجم على شاشة الطريق. Some cases require a DG declaration.

What to print	Minimum detail	الموضع	لماذا يهمك
اسم الشحن الصحيح	"ثاني أكسيد الكربون, solid” or “Dry ice”	Address side	تحديد هوية عالمية
رقم الأمم المتحدة	UN1845	With the name	Acceptance check passes faster
Net quantity	kg only (not lb)	Near address; outside تسمية الخطر	Prevents re‑labeling delays
Class label	فصل 9 الماس	Flat, clean surface	Visual cue for handlers

Which carriers and services change the maximum dry ice allowed per package?

Airlines and integrators can set lower caps than PI 954. يتوقع 2.5–10 kg caps in some express networks for standard parcel air services. أمتعة الركاب holds at 2.5 كجم per person/package with airline approval. USPS caps 5 رطل for domestic air; heavier pieces must move surface/ground with “Surface Mail Only” marking. أرضي carriers will carry >2.5 kg per package under additional rules—confirm acceptance first.

USPS, أمتعة الركاب, and ground exceptions—how to plan

AUSPS AIR (≤5 رطل): Upgrade insulation or compress transit time to stay under the cap.
راكب (2.5 كجم): Declare, علامة, and use vented containers. For more volume, ship cargo.
أرضي >2.5 كجم: Apply full markings and ensure driver awareness in enclosed vehicles.

2025 developments and trends shaping the maximum dry ice allowed per package

نظرة عامة على الاتجاه: في 2025, cold chain programs focus on optimal—not maximal—dry ice. ذكي أجهزة استشعار ثاني أكسيد الكربون, automated venting, و hybrid PCM + الثلج الجاف pack‑outs reduce risk, re‑ice events, and emissions. Operators are tightening per‑flight CO₂ load planning in hot seasons and animal‑carriage routes. Update SOPs with current label formats and bigger type for صافي كجم readability.

ما الجديد (at a glance)

Smart CO₂ monitoring: Real‑time gas + temperature alerts cut surprise rejections.
Hybrid pack‑outs: بي سي إم + modest dry ice extends hold time with less total CO₂.
Acceptance UX: Carriers emphasize pre‑booking quantity checks and clear label placement.

نظرة السوق: Biologics and gene therapies keep demand high. Reusable VIP systems and route‑specific pack‑outs reduce total dry ice while maintaining deep‑frozen lanes. Teams that model sublimation against per‑hold caps avoid last‑minute splits and delays.

الأسئلة المتداولة

س 1. What is the maximum dry ice allowed per package on air cargo?
عادة 200 كجم تحت بي 954, but operators can set lower numbers. Book early and confirm.

Q2. What is the maximum dry ice allowed per package in passenger baggage?
2.5 كجم (5.5 رطل) per person/package with airline approval in a تنفيس حاوية.

س 3. What is the maximum dry ice allowed per package in USPS domestic air?
5 رطل لكل بريد. Heavier pieces must travel surface/ground and be marked accordingly.

س 4. Can I exceed 2.5 kg on ground?
نعم, but you lose the small‑quantity exception and must meet added hazmat and carrier rules.

س 5. Where do I write the net weight?
On the outer box in كيلوغرام, لا inside the Class 9 الماس.

Q6. Does form (الكريات مقابل الكتل) change the maximum dry ice allowed per package?
No—the cap is net mass. Pellets sublimate faster, so plan slightly higher loads for the same hold time.

Q7. Do I need a Shipper’s Declaration?
أحيانا. For non‑DG products cooled by dry ice, you often only note UN1845 and net kg on the AWB. Check your operator’s rules.

ملخص وتوصيات

النقاط الرئيسية: ال maximum dry ice allowed per package يكون 200 كجم for air cargo (typically), 2.5 كجم for passenger baggage, و 5 رطل for USPS air. Always vent CO₂, علامة UN1845 و صافي كجم, and confirm operator variations. Use VIP or hybrid pack‑outs to lower required mass and stay well below caps.

الخطوات التالية:

Map your mode and route; apply the correct cap.
Use the estimator above to size dry ice and validate venting.
Print compliant labels and pre‑book quantities with the carrier.
Add CO₂ and temperature logging to every high‑value lane.
CTA: Need a PI‑954‑ready label set and pack‑out checklist? تحدث إلى Tempk اليوم.

حول Tempk

We design and validate IATA‑compliant dry‑ice and PCM systems for biopharma, طعام, and specialty logistics. Our engineers combine packaging science with airline acceptance know‑how to cut rejections and re‑ice costs. Clients see fewer delays and more stable temperatures thanks to right‑sized dry ice and better venting.

Let’s optimize your route: Request a lane‑specific pack‑out and labeling template from our team.