Hazora · Library
UN/NA 3491 · Poisonous by inhalation liquid, water-reactive, flammable, n.o.s. (Inhalation Hazard Zone B)
UN/NA 3491 · ERG 2024 · Guide 155
- UN/NA
- 3491
- Edition
- ERG 2024
ERG 2024 lists UN/NA 3491 (Poisonous by inhalation liquid, water-reactive, flammable, n.o.s. (Inhalation Hazard Zone B)) under Guide 155, titled “Substances - Toxic and/or Corrosive (Flammable/Water-Sensitive)”.
Material name
| Language | Material name | Guides |
|---|---|---|
| EN | Poisonous by inhalation liquid, water-reactive, flammable, n.o.s. (Inhalation Hazard Zone B) | Guide 155 |
| EN | Toxic by inhalation liquid, water-reactive, flammable, n.o.s. (Inhalation Hazard Zone B) | Guide 155 |
| ES | Líquido tóxico por inhalación, hidrorreactivo, inflamable, n.e.p. (Zona B de Peligro para la Inhalación) | Guide 155 |
| FR | Liquide toxique à l'inhalation, hydroréactif, inflammable, n.s.a. (Danger par Inhalation Zone B) | Guide 155 |
3491 on a placard, orange panel or shipping paper
It can stand for either of two ERG 2024 entries: “Poisonous by inhalation liquid, water-reactive, flammable, n.o.s. (Inhalation Hazard Zone B)” and “Toxic by inhalation liquid, water-reactive, flammable, n.o.s. (Inhalation Hazard Zone B)”. Both use Guide 155, so the number alone is enough to find the guide. On a numbered orange panel, 3491 is the lower number (how to read an orange panel).
ERG 2024 markings for 3491
3491 is highlighted in green, so ERG 2024 Table 1 (Initial Isolation and Protective Action Distances) has an entry for it: “Poisonous by inhalation liquid, water-reactive, flammable, n.o.s. (Inhalation Hazard Zone B)”. Hazora shows those distances in the app, not on this page. Its guide number 155 has no P.
Entries near 3491
By number (yellow pages): before 3491 come UN/NA 3488 Poisonous by inhalation liquid, flammable, corrosive, n.o.s. (Inhalation Hazard Zone A) (Guide 131); UN/NA 3489 Poisonous by inhalation liquid, flammable, corrosive, n.o.s. (Inhalation Hazard Zone B) (Guide 131) and UN/NA 3490 Poisonous by inhalation liquid, water-reactive, flammable, n.o.s. (Inhalation Hazard Zone A) (Guide 155); after it, UN/NA 3492 Poisonous by inhalation liquid, corrosive, flammable, n.o.s. (Inhalation Hazard Zone A) (Guide 131); UN/NA 3493 Poisonous by inhalation liquid, corrosive, flammable, n.o.s. (Inhalation Hazard Zone B) (Guide 131) and UN/NA 3494 Petroleum sour crude oil, flammable, poisonous (Guide 131).
By name (blue pages): “Poisonous by inhalation liquid, water-reactive, flammable, n.o.s. (Inhalation Hazard Zone B)” comes after Poisonous by inhalation liquid, oxidizing, n.o.s. (Inhalation Hazard Zone B) (UN/NA 3388, Guide 142) and Poisonous by inhalation liquid, water-reactive, flammable, n.o.s. (Inhalation Hazard Zone A) (UN/NA 3490, Guide 155) and before Poisonous by inhalation liquid, water-reactive, n.o.s. (Inhalation Hazard Zone A) (UN/NA 3385, Guide 139) and Poisonous by inhalation liquid, water-reactive, n.o.s. (Inhalation Hazard Zone B) (UN/NA 3386, Guide 139).
By name (blue pages): “Toxic by inhalation liquid, water-reactive, flammable, n.o.s. (Inhalation Hazard Zone B)” comes after Toxic by inhalation liquid, oxidizing, n.o.s. (Inhalation Hazard Zone B) (UN/NA 3388, Guide 142) and Toxic by inhalation liquid, water-reactive, flammable, n.o.s. (Inhalation Hazard Zone A) (UN/NA 3490, Guide 155) and before Toxic by inhalation liquid, water-reactive, n.o.s. (Inhalation Hazard Zone A) (UN/NA 3385, Guide 139) and Toxic by inhalation liquid, water-reactive, n.o.s. (Inhalation Hazard Zone B) (UN/NA 3386, Guide 139).
Other names starting with “Poisonous”: Poisonous by inhalation liquid, n.o.s. (Inhalation Hazard Zone A) (UN/NA 3381, Guide 151); Poisonous by inhalation liquid, n.o.s. (Inhalation Hazard Zone B) (UN/NA 3382, Guide 151); Poisonous by inhalation liquid, oxidizing, n.o.s. (Inhalation Hazard Zone A) (UN/NA 3387, Guide 142); Poisonous liquid, corrosive, inorganic, n.o.s. (UN/NA 3289, Guide 154); Poisonous liquid, corrosive, organic, n.o.s. (UN/NA 2927, Guide 154) and Poisonous liquid, flammable, organic, n.o.s. (UN/NA 2929, Guide 131).
Other names starting with “Toxic”: Toxic by inhalation liquid, flammable, n.o.s. (Inhalation Hazard Zone A) (UN/NA 3383, Guide 131); Toxic by inhalation liquid, flammable, n.o.s. (Inhalation Hazard Zone B) (UN/NA 3384, Guide 131); Toxic liquid, inorganic, n.o.s. (UN/NA 3287, Guide 151); Toxic liquid, organic, n.o.s. (UN/NA 2810, Guide 153); Toxic liquid, oxidizing, n.o.s. (UN/NA 3122, Guide 142) and Toxic liquid, water-reactive, n.o.s. (UN/NA 3123, Guide 139).
Guide 155 · Library
Guide 155 covers 44 UN/NA numbers. The 12 around 3491 in the guide’s number order: UN/NA 1162 Dimethyldichlorosilane; UN/NA 1181 Ethyl chloroacetate; UN/NA 1182 Ethyl chloroformate; UN/NA 1196 Ethyltrichlorosilane; UN/NA 1238 Methyl chloroformate; UN/NA 1250 Methyltrichlorosilane; UN/NA 2826 Ethyl chlorothioformate; UN/NA 2985 Chlorosilanes, flammable, corrosive, n.o.s.; UN/NA 2986 Chlorosilanes, corrosive, flammable, n.o.s.; UN/NA 3080 Isocyanate solution, poisonous, flammable, n.o.s.; UN/NA 3362 Chlorosilanes, poisonous, corrosive, flammable, n.o.s.; UN/NA 3490 Poisonous by inhalation liquid, water-reactive, flammable, n.o.s. (Inhalation Hazard Zone A).
Source: ERG 2024 (U.S. DOT PHMSA, Transport Canada, SICT Mexico), for the initial phase of a transportation incident only. Hazora is not an official ERG publication and is not affiliated with or endorsed by these or any other government agencies.