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UN identification number

UN1739: Benzyl chloroformate

UN1739 appears 1 time in the Hazardous Materials Table (49 CFR §172.101). Hazard class 8, packing group I.

ID numberUN1739
Hazard class8
Packing groupI
Label codes8

All §172.101 entries for UN1739

Proper shipping nameClassPGLabels
Benzyl chloroformate8I8

Open any entry for packaging sections, special provisions, air limits and vessel stowage.

What it means

8
Class 8 — Corrosive. Materials that destroy skin tissue or corrode steel or aluminum.

Packing group ranks danger within the class: PG I = great danger.

Label codes (column 6): 8 → Corrosive label.

UN numbers are recognized for international and domestic transport.

Example basic description

UN1739, Benzyl chloroformate, 8, PG I

Proper shipping name shown without the table's italic descriptive text. Order per §172.202: ID number, proper shipping name, hazard class, packing group. Example only — add technical names, “RQ”, quantities and other elements your shipment requires.

What to check next

  1. Match the name. Compare your SDS Section 14 to the proper shipping names above and pick the row with your packing group.
  2. Read the special provisions on the entry page (§172.102) — they can add limits or exceptions.
  3. Check packaging — the entry page lists the Part 173 sections for exceptions, non-bulk and bulk.
  4. Labels & placards. Placarding depends on class and quantity — see Table 1 vs Table 2.
  5. Emergency response. Find the response guide for UN1739 in the current PHMSA Emergency Response Guidebook.
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Common questions about UN1739

What is UN1739?

UN1739 is the identification number for Benzyl chloroformate in the DOT Hazardous Materials Table (49 CFR §172.101).

What hazard class is UN1739?

UN1739 is listed under hazard class 8 (corrosive).

What packing group is UN1739?

Packing group for UN1739: I. Where several rows exist, the packing group that fits your material decides which row applies.

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Source: Hazardous Materials Table (49 CFR §172.101), eCFR.gov — current as of Oct 23, 2026. View the official table. Reference only — verify current requirements before shipping.