UN/NA 2521 · Diketene, stabilized

Material name

2521 on a placard, orange panel or shipping paper

It points to the ERG 2024 entry “Diketene, stabilized” and to Guide 131P. On a numbered orange panel, 2521 is the lower number (how to read an orange panel).

ERG 2024 markings for 2521

In the ERG 2024 lists, “Diketene, stabilized” has guide number 131P; the P means the material may undergo violent polymerization.

2521 is highlighted in green, so ERG 2024 Table 1 (Initial Isolation and Protective Action Distances) has an entry for it: “Diketene, stabilized”. Hazora shows those distances in the app, not on this page.

Entries near 2521

By number (yellow pages): before 2521 come UN/NA 2517 1-Chloro-1,1-difluoroethane (Guide 115); UN/NA 2518 1,5,9-Cyclododecatriene (Guide 153) and UN/NA 2520 Cyclooctadienes (Guide 130P); after it, UN/NA 2522 2-Dimethylaminoethyl methacrylate, stabilized (Guide 153P); UN/NA 2524 Ethyl orthoformate (Guide 129) and UN/NA 2525 Ethyl oxalate (Guide 156).

By name (blue pages): “Diketene, stabilized” comes after Diisopropyl ether (UN/NA 1159, Guide 127) and Diisopropylamine (UN/NA 1158, Guide 132) and before Dimethyl carbonate (UN/NA 1161, Guide 129) and Dimethyl disulfide (UN/NA 2381, Guide 131).

Guide 131 · Library

Guide 131 covers 105 UN/NA numbers. The 12 around 2521 in the guide’s number order: UN/NA 2382 Dimethylhydrazine, symmetrical; UN/NA 2396 Methacrylaldehyde, stabilized; UN/NA 2404 Propionitrile; UN/NA 2411 Butyronitrile; UN/NA 2438 Trimethylacetyl chloride; UN/NA 2477 Methyl isothiocyanate; UN/NA 2558 Epibromohydrin; UN/NA 2603 Cycloheptatriene; UN/NA 2611 Propylene chlorohydrin; UN/NA 2622 Glycidaldehyde; UN/NA 2668 Chloroacetonitrile; UN/NA 2758 Carbamate pesticide, liquid, flammable, poisonous.

Sources

• PHMSA · ERG 2024 · EN / ES / FR