HazMat Tool — substance information
Reference only — not a shipping paper, placard mandate, or CVI record.
p-Xylyl diazide
HMT 15 June 2026- UN / ID
- —
- Hazard class
- Forbidden
- Packing group
- —
- ERG guide
- —
- Special provisions
- —
- Source
- 49 CFR §172 (15 June 2026)
This Hazmat is classified as "Forbidden". This means the material may not be offered for transportation or transported in the applicable mode of transport.
p-Xylyl diazide
p-Xylene (para-xylene) is an aromatic hydrocarbon. It is one of the three isomers of dimethylbenzene known collectively as xylenes. The p- stands for para-, indicating that the two methyl groups in p-xylene occupy the diametrically opposite substituent positions 1 and 4. It is in the positions of the two methyl groups, their arene substitution pattern, that it differs from the other isomers, o-xylene and m-xylene 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.***)
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| (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 | — |
|---|---|
| (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.
Similar substances
| UN / ID | Proper shipping name | Hazard class |
|---|---|---|
| UN 1701 | Xylyl bromide, liquid | 6.1 |
| UN 3417 | Xylyl bromide, solid | 6.1 |