Hazora · Library
UN/NA 1250 · Methyltrichlorosilane
UN/NA 1250 · ERG 2024 · Guide 155
- UN/NA
- 1250
- Edition
- ERG 2024
ERG 2024 lists UN/NA 1250 (Methyltrichlorosilane) under Guide 155, titled “Substances - Toxic and/or Corrosive (Flammable/Water-Sensitive)”.
Material name
1250 on a placard, orange panel or shipping paper
It points to the ERG 2024 entry “Methyltrichlorosilane” and to Guide 155. On a numbered orange panel, 1250 is the lower number (how to read an orange panel).
ERG 2024 markings for 1250
1250 is highlighted in green, so ERG 2024 Table 1 (Initial Isolation and Protective Action Distances) has an entry for it: “Methyltrichlorosilane (when spilled in water)”. Hazora shows those distances in the app, not on this page. “When spilled in water” means the material produces large amounts of toxic inhalation hazard (TIH) gases when spilled in water. Table 2 (Water-Reactive Materials Which Produce Toxic Gases) lists the gas produced: HCl (hydrogen chloride). Its guide number 155 has no P.
Entries near 1250
By number (yellow pages): before 1250 come UN/NA 1247 Methyl methacrylate monomer, stabilized (Guide 129P); UN/NA 1248 Methyl propionate (Guide 129) and UN/NA 1249 Methyl propyl ketone (Guide 127); after it, UN/NA 1251 Methyl vinyl ketone, stabilized (Guide 131P); UN/NA 1259 Nickel carbonyl (Guide 131) and UN/NA 1261 Nitromethane (Guide 129).
By name (blue pages): “Methyltrichlorosilane” comes after Methylphenyldichlorosilane (UN/NA 2437, Guide 156) and Methyltetrahydrofuran (UN/NA 2536, Guide 127) and before Molten sulfur (UN/NA 2448, Guide 133) and Molten sulphur (UN/NA 2448, Guide 133).
Guide 155 · Library
Guide 155 covers 44 UN/NA numbers. The 12 around 1250 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 1298 Trimethylchlorosilane; UN/NA 1305 Vinyltrichlorosilane; UN/NA 1603 Ethyl bromoacetate; UN/NA 1717 Acetyl chloride; UN/NA 1722 Allyl chlorocarbonate; UN/NA 1724 Allyltrichlorosilane, stabilized; UN/NA 3491 Poisonous by inhalation liquid, water-reactive, flammable, n.o.s. (Inhalation Hazard Zone B).
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.