HazMat Tool — substance information Reference only — not a shipping paper, placard mandate, or CVI record.

p-Diazidobenzene

HMT 15 June 2026

UN / ID: —
Hazard class: Forbidden
Packing group: —
ERG guide: —
Special provisions: —
Source: 49 CFR §172 (15 June 2026)

On this page

p-Diazidobenzene

p-Phenylenediamine (PPD) is an organic compound with the formula C6H4(NH2)2. This derivative of aniline is a white solid, but samples can darken due to air oxidation. It is mainly used as a component of engineering polymers and composites like kevlar. It is also an ingredient in hair dyes and is occasionally used as a substitute for henna Wikipedia

Hazardous Materials Table

Source: 49 CFR §172 (15 June 2026)

(3) Hazard class

Forbidden

(4) Identification number

—

(5) Packing Group

—

(6) Labels

—

(7) Special Provisions (§172.102)

×Note:
Special provisions may be very complex. The extracts are taken from 49 CFR §172.102. Please be careful with the information, as necessary, additional conditions may be applied that are not written here. Please check the original source and report bugs.

—	see 49 CFR §172.102

(8) Packing Authorizations (§173.***)

(8A) Exceptions	—
(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.