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HomeUN NumbersClass 2.3UN3512
Hazard Class 2.3

UN Number

UN3512

Adsorbed gas, toxic, n.o.s. Inhalation hazard zone A

Official source: 49 CFR 172.101 (eCFR)

Hazardous Materials Table entry

4 rows in 49 CFR 172.101 for UN3512.

Sym.DescriptionClassPGLabelsSpecial provisions8A8B8C9A9B10A10B
GAdsorbed gas, toxic, n.o.s. Inhalation hazard zone A2.3—2.31None302cNoneForbiddenForbiddenD40
GAdsorbed gas, toxic, n.o.s. Inhalation hazard zone B2.3—2.32, B9, B14None302cNoneForbiddenForbiddenD40
GAdsorbed gas, toxic, n.o.s. Inhalation hazard zone C2.3—2.33, B14None302cNoneForbiddenForbiddenD40
GAdsorbed gas, toxic, n.o.s. Inhalation hazard zone D2.3—2.34None302cNoneForbiddenForbiddenD40
  • Sym.: Column 1 symbols, 49 CFR 172.101(b).
  • Description: Column 2, the proper shipping name, 172.101(c).
  • Class: Column 3, hazard class or division, 172.101(d).
  • PG: Column 5, packing group, 172.101(f).
  • Labels: Column 6, label codes, 172.101(g).
  • Special provisions: Column 7, codes explained in 49 CFR 172.102, 172.101(h).
  • 8A / 8B / 8C: Packaging exceptions, non-bulk and bulk sections of 49 CFR part 173 (an entry of 202 means 173.202), 172.101(i).
  • 9A / 9B: Maximum quantity per package on passenger aircraft or rail, and on cargo aircraft only, 172.101(j).
  • 10A / 10B: Vessel stowage location and other stowage and handling codes, 172.101(k).

Division 2.3 — Gas Poisonous by Inhalation

See the full class list

A gas poisonous by inhalation (Division 2.3) is a gas at 20°C (68°F) or less and 101.3 kPa (14.7 psia) that is known to be so toxic to humans as to pose a hazard to health during transportation, or is presumed toxic based on laboratory animal LC50 data.

Source: 49 CFR 173.115 (eCFR).

Previous / next UN number

UN3511Adsorbed gas, n.o.sUN3513Adsorbed gas, oxidizing, n.o.s

Nearby Class 2.3 UN Numbers

UN3309Liquefied gas, toxic, flammable, corrosive, n.o.s. Inhalation Hazard Zone AUN3310Liquefied gas, toxic, oxidizing, corrosive, n.o.s. Inhalation Hazard Zone AUN3318Ammonia solution, relative density less than 0.880 at 15 degrees C in water, with more than 50 percent ammoniaUN3355Insecticide gases, toxic, flammable, n.o.s. Inhalation hazard Zone AUN3514Adsorbed gas, toxic, flammable, n.o.s. Inhalation hazard zone AUN3515Adsorbed gas, toxic, oxidizing, n.o.s. Inhalation hazard zone AUN3516Adsorbed gas, toxic, corrosive, n.o.s. Inhalation hazard zone AUN3517Adsorbed gas, toxic, flammable, corrosive, n.o.s. Inhalation hazard zone A
View the full Class 2.3 list →

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