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

Toxic solids, water-reactive, n.o.s

HMT 15 June 2026
Reference only — HMT snapshot for inspection and audit support; not a shipping paper, placard mandate, or CVI record. Use Print / PDF below for field notes.
UN / ID
UN 3125
Hazard class
6.1
Packing group
I
ERG guide
ERG 139
Special provisions
SP A5, SP T6, SP TP33, SP W100
Source
49 CFR §172 (15 June 2026)

Spot an error in this entry?

Toxic solids, water-reactive, n.o.s


Toxic or poisonous material is a material, other than a gas, known to be so toxic to humans that it presents a health hazard during transportation More Information

Emergency Response Guide No. 139

Hazardous Materials Table

Source: 49 CFR §172 (15 June 2026)

(3) Hazard class

6.1
Poisonous Material

(4) Identification number Help

UN 3125

(5) Packing Group Help

I

(6) Labels Help

Poisonous liquids PG I Zone A (6.1) Dangerous when wet materials (4.3)

(1) Symbols Help


This entry is signed with "G". The letter "G" identifies proper shipping names for which one or more technical names of the hazardous material must be entered in parentheses, in association with the basic description. (See §172.203(k)).

(7) Special Provisions (§172.102) Help

×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.
A5
T6
TP33
W100

(8) Packing Authorizations (§173.***) Help

(8A) ExceptionsNone
(8B) Non-bulk211see 49 CFR §173.211
(8C) Bulk242see 49 CFR §173.242

(9) Quantity Limits Help

(9A) Passenger aircraft/rail5 kg
(9B) Cargo aircraft only15 kg

(10) Vessel stowage Help

(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.

Scope & sources (important)Click to show CFR references

This check evaluates segregation per 49 CFR §177.848. Additional loading/unloading and handling requirements may still apply; see 49 CFR §177 Subpart B (Loading and Unloading):

  • §177.834 - General requirements
  • §177.835 - Class 1 materials
  • §177.837 - Class 3 materials
  • §177.838 - Class 4 (flammable solid) materials, Class 5 (oxidizing) materials, and Division 4.2 (pyroforic liquid) materials
  • §177.839 - Class 8 (corrosive) materials
  • §177.840 - Class 2 (gases) materials
  • §177.841 - Division 6.1 and Division 2.3 materials
  • §177.842 - Class 7 (radioactive) material
  • §177.843 - Contamination of vehicles

Similar substances

UN / IDProper shipping nameHazard class
UN 3490Toxic by inhalation liquid, water-reactive, flammable, n.o.s. with an LC50 lower than or equal to 200 ml/m3 and saturated vapor concentration greater than or equal to 500 LC506.1
UN 3491Toxic by inhalation liquid, water-reactive, flammable, n.o.s. with an LC50 lower or equal to 1000 ml/m3 and saturated vapor concentration greater than or equal to 10 LC506.1
UN 3386Toxic by inhalation liquid, water-reactive, n.o.s. with an LC50 lower than or equal to 1000 ml/m3 and saturated vapor concentration greater than or equal to 10 LC506.1
UN 3385Toxic by inhalation liquid, water-reactive, n.o.s. with an LC50 lower than or equal to 200 ml/m3 and saturated vapor concentration greater than or equal to 500 LC506.1
UN 3476Fuel cell cartridges or Fuel cell cartridges contained in equipment or Fuel cell cartridges packed with equipment, containing water-reactive substances4.3
UN 3394Organometallic substance, liquid, pyrophoric, water-reactive4.2
UN 3393Organometallic substance, solid, pyrophoric, water-reactive4.2
UN 3231Self-reactive liquid type B, temperature controlled4.1
UN 3233Self-reactive liquid type C, temperature controlled4.1
UN 3235Self-reactive liquid type D, temperature controlled4.1
UN 3237Self-reactive liquid type E, temperature controlled4.1
UN 3239Self-reactive liquid type F, temperature controlled4.1
UN 3232Self-reactive solid type B, temperature controlled4.1
UN 3234Self-reactive solid type C, temperature controlled4.1
UN 3236Self-reactive solid type D, temperature controlled4.1