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HomeUN NumbersClass 2.3UN3318
Hazard Class 2.2Hazard Class 2.3

UN Number

UN3318

Ammonia solution, relative density less than 0.880 at 15 degrees C in water, with more than 50 percent ammonia

Official source: 49 CFR 172.101 (eCFR)

Hazardous Materials Table entry

2 rows in 49 CFR 172.101 for UN3318.

Sym.DescriptionClassPGLabelsSpecial provisions8A8B8C9A9B10A10B
IAmmonia solution, relative density less than 0.880 at 15 degrees C in water, with more than 50 percent ammonia2.3—2.3, 84, N87, T50None304314, 315ForbiddenForbiddenD40, 52, 57
DAmmonia solution, relative density less than 0.880 at 15 degrees C in water, with more than 50 percent ammonia2.2—2.213, T50None304314, 315ForbiddenForbiddenD40, 52, 57
  • 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 2.2 — Non-Flammable, Non-Poisonous Gas

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A non-flammable, nonpoisonous compressed gas (Division 2.2) exerts a gauge pressure of 200 kPa (29.0 psig) or greater at 20°C (68°F), is a liquefied gas or a cryogenic liquid, and does not meet the definition of Division 2.1 or 2.3.

Source: 49 CFR 173.115 (eCFR).

Division 2.3 — Gas Poisonous by Inhalation

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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

UN33172-Amino-4,6-Dinitrophenol, wetted with not less than 20 percent water by massUN3319Nitroglycerin mixture, desensitized, solid, n.o.s. with more than 2 percent but not more than 10 percent nitroglycerin, by mass

Nearby Class 2.2 UN Numbers

UN3297Ethylene oxide and chlorotetrafluoroethane mixture with not more than 8.8 percent ethylene oxideUN3298Ethylene oxide and pentafluoroethane mixture with not more than 7.9 percent ethylene oxideUN3299Ethylene oxide and tetrafluoroethane mixture with not more than 5.6 percent ethylene oxideUN3311Gas, refrigerated liquid, oxidizing, n.o.s. (cryogenic liquid)UN3337Refrigerant gas R 404AUN3338Refrigerant gas R 407AUN3339Refrigerant gas R 407BUN3340Refrigerant gas R 407C
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Nearby Class 2.3 UN Numbers

UN3307Liquefied gas, toxic, oxidizing, n.o.s. Inhalation Hazard Zone AUN3308Liquefied gas, toxic, corrosive, n.o.s. Inhalation Hazard Zone AUN3309Liquefied gas, toxic, flammable, corrosive, n.o.s. Inhalation Hazard Zone AUN3310Liquefied gas, toxic, oxidizing, corrosive, n.o.s. Inhalation Hazard Zone AUN3355Insecticide gases, toxic, flammable, n.o.s. Inhalation hazard Zone AUN3512Adsorbed gas, toxic, 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 A
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