UN 1072 identifies which substance in compressed form?

UN 1072 identifies which substance in compressed form?

• A. Nitrogen, compressed
• B. Argon, compressed
• C. Oxygen, compressed
• D. Helium, compressed

Answer: (C)

UN numbers are the four-digit codes used on hazmat shipments to identify the specific substance in transport. The number 1072 is assigned to Oxygen, compressed, so that code points to that substance in its compressed-gas form. That makes it the correct match for the question. The other gases—nitrogen, argon, and helium—have different UN numbers for their compressed forms, so they wouldn’t be identified by 1072. Remember, oxygen is a non-flammable gas that acts as an oxidizer, which is why handling and labeling emphasize its oxidizing properties and the need to avoid sources of ignition nearby.

UN numbers are the four-digit codes used on hazmat shipments to identify the specific substance in transport. The number 1072 is assigned to Oxygen, compressed, so that code points to that substance in its compressed-gas form. That makes it the correct match for the question. The other gases—nitrogen, argon, and helium—have different UN numbers for their compressed forms, so they wouldn’t be identified by 1072. Remember, oxygen is a non-flammable gas that acts as an oxidizer, which is why handling and labeling emphasize its oxidizing properties and the need to avoid sources of ignition nearby.