Hazmat UN Number Lookup

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🏷️ Primary Hazard Class Filter

UN1043

Fertilizer ammoniating solution with free ammonia

Gases

Class 2.2

CAS Registry7664-41-7

Hazchem / EAC2T

ERG Guide Number120

49 CFR Placards & Labels

Non-Flammable GasClass 2.2

⇩ SVG

Reportable Quantity — 100 lb (45.4 kg)

Any release meeting or exceeding this amount must be reported to the National Response Center at 1-800-424-8802 under 40 CFR 302.6 and 49 CFR 171.15.

Source: 40 CFR §302.4 CERCLA list, matched by CAS. DOT §172.101 Appendix A lists the same substance under a different chemical name; RQ value is identical by regulatory design.

Not listed as a Marine Pollutant under §172.101 Appendix B.

Regulatory Facts

Packing Group

—

Symbols (col 1)

—

Labels (col 6)

2.2

PIH Zone

—

Packaging references (49 CFR §173.xxx)

Exceptions (col 8A)

§173.306

Non-Bulk (col 8B)

§173.304

Bulk (col 8C)

§173.314, 315

Aircraft quantity limits (col 9)

Passenger / Rail (9A)

Forbidden

Cargo Aircraft Only (9B)

150 kg

Vessel stowage (col 10)

Location (10A)

Other codes (10B)

Special provisions (col 7 — §172.102)

N87

Hazard Classification & Risks

Class 2.2 — Non-flammable, non-toxic gas (includes asphyxiant and oxidizing gases). Pressure ≥280 kPa at 20°C or refrigerated liquefied (49 CFR §173.115).

Transport Regulations

Hazard class 2.2. Placard/label codes: 2.2. Special provisions: N87. Packaging (49 CFR §173): exceptions §306, non-bulk §304, bulk §314, 315. Quantity limits: passenger aircraft/rail Forbidden, cargo aircraft only 150 kg. Vessel stowage: E (other: 40). Classified per 49 CFR §172.101.

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Source & sourcing note

Regulatory data mirrors the U.S. 49 CFR §172.101 Hazardous Materials Table and companion columns (packaging, quantity limits, vessel stowage, special provisions) as published by the U.S. Pipeline and Hazardous Materials Safety Administration (PHMSA).

Emergency-response content is drawn from the 2024 Emergency Response Guidebook (ERG), a joint publication of PHMSA, Transport Canada, and Mexico’s SCT.

The U.S. edition of the ERG and all U.S. federal regulations are public-domain works under 17 U.S.C. §105. Descriptions on this page are plain-English paraphrases; for any compliance decision, consult the authoritative text on eCFR Title 49 and the ERG at PHMSA.dot.gov. “ERG™” is attributed to PHMSA / Transport Canada / SCT and used nominatively.