UN 2303

UN 2303 is the transport identification number used for Alpha-Methylstyrene in our database. It appears in Section 14 of the SDS, on shipping papers and on hazmat placards and labels.

Proper shipping name

• UN 2303; Isopropenylbenzene

DOT hazard classification

• Isopropenylbenzene
• UN2303
• Class 3 Flammable and combustible liquid (49 eCFR § 173.120)

Emergency Response Guidebook

• 2303 128

Transport data from NOAA CAMEO Chemicals, HSDB and other sources via PubChem. Always confirm against 49 CFR 172.101 and the current ERG.