Class 8 — Corrosives
Substances that destroy skin tissue or corrode steel or aluminium at a defined rate.
Carrier acceptance
The published default for this class. A UN-specific rule can override it — lithium batteries and dry ice are both Class 9 and are treated quite differently.
| Carrier | Ground | Air | Position |
|---|---|---|---|
| UPS | contract required | contract required | Corrosives accepted under the hazmat agreement; limited quantity ground is available for retail packs. |
| FedEx | contract required | contract required | Corrosives require dangerous goods approval; limited quantity moves on FedEx Ground. |
| USPS | restricted | prohibited | Corrosives in packing groups II and III are mailable by surface only as a limited quantity; packing group I is non-mailable. |
| Amazon FBA | review required | restricted | Corrosives in packing groups II and III accepted after review; packing group I is not accepted. |
Carrier positions encode each carrier's published default as of the ruleset date. Tariffs change more often than regulations, and a contracted shipper may hold different terms — confirm against the carrier's current guide before the first shipment of a new item.
Encoded entries (10)
| UN | Proper shipping name | Class | PG | Labels | Air |
|---|---|---|---|---|---|
| UN1791 | Hypochlorite solution | 8 | II/III — derived | CORROSIVE | pax limited·cargo permitted |
| UN1824 | Sodium hydroxide solution | 8 | II/III — derived | CORROSIVE | pax limited·cargo permitted |
| UN1823 | Sodium hydroxide, solid | 8 | II | CORROSIVE | pax limited·cargo permitted |
| UN1789 | Hydrochloric acid | 8 | II/III — derived | CORROSIVE | pax limited·cargo permitted |
| UN1830 | Sulfuric acid with more than 51% acid | 8 | II | CORROSIVE | pax limited·cargo permitted |
| UN2796 | Battery fluid, acid | 8 | II | CORROSIVE | pax limited·cargo permitted |
| UN2794 | Batteries, wet, filled with acid, electric storage | 8 | none | CORROSIVE | pax limited·cargo permitted |
| UN2800 | Batteries, wet, non-spillable, electric storage | 8 | none | CORROSIVE | pax limited·cargo permitted |
| UN1760 | Corrosive liquid, n.o.s. | 8 | I/II/III — derived | CORROSIVE | pax limited·cargo permitted |
| UN2809 | Mercury(subsidiary 6.1) | 8 | III | CORROSIVE, TOXIC | pax forbidden·cargo limited |
Classify a specific product in this class
The class alone does not give you a shipping paper. Send the actual product to POST /api/classify and you get the UN number, the proper shipping name, the packing group and every carrier position for that specific item.
Questions
- What is Class 8 — Corrosives?
- Substances that destroy skin tissue or corrode steel or aluminium at a defined rate.
- Does Class 8 — Corrosives have a packing group?
- Yes for most entries. Packing group I is the highest danger, II medium, III low. Where an entry's packing group depends on a measured property (a flash point for Class 3, a concentration for Class 8), Classify7 asks for that figure rather than assuming one.
- Can I ship Class 8 — Corrosives by air?
- UPS: contract required; FedEx: contract required; USPS: prohibited; Amazon FBA: restricted. These are published carrier defaults, not regulatory limits — a contracted shipper may hold different terms, and the regulation may permit what the carrier declines.