HazMat Tool — substance information
Reference only — not a shipping paper, placard mandate, or CVI record.
Acetylene, solvent free
HMT 15 June 2026- UN / ID
- —
- Hazard class
- Forbidden
- Packing group
- —
- ERG guide
- —
- Special provisions
- —
- Source
- 49 CFR §172 (15 June 2026)
Acetylene, solvent free
Acetylene (systematic name: ethyne) is a chemical compound with the formula C2H2 and structure HC≡CH. It is a hydrocarbon and the simplest alkyne. This colorless gas is widely used as a fuel and a chemical building block. It is unstable in its pure form and thus is usually handled as a solution Wikipedia
Hazardous Materials Table
Source: 49 CFR §172 (15 June 2026)(3) Hazard classForbidden |
(4) Identification number |
(5) Packing Group |
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(6) Labels — |
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(7) Special Provisions (§172.102)
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(8) Packing Authorizations (§173.***) 
| (8A) Exceptions | — |
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| (8B) Non-bulk | — |
| (8C) Bulk | — |
(9) Quantity Limits
| (9A) Passenger aircraft/rail | — |
|---|---|
| (9B) Cargo aircraft only | — |
(10) Vessel stowage
| (10A) Location | — |
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| (10B) Other | — |
Segregation chart for load, transport, and storage
This chart shows whether loading, transport, or storage with other hazard classes is permitted, prohibited, or restricted. Based on 49 CFR §177.848.
This Hazmat is classified as "Forbidden". This means the material may not be offered for transportation or transported in the applicable mode of transport.