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HomeUN NumbersClass 4.2UN2318
Hazard Class 4.2Packing Group II

UN Number

UN2318

Sodium hydrosulfide, with less than 25 percent water of crystallization

Official source: 49 CFR 172.101 (eCFR)

Hazardous Materials Table entry

One row in 49 CFR 172.101 for UN2318.

Sym.DescriptionClassPGLabelsSpecial provisions8A8B8C9A9B10A10B
—Sodium hydrosulfide, with less than 25 percent water of crystallization4.2II4.2A7, A19, A20, IB6, IP2, T3, TP33, W31None21224115 kg50 kgA52
  • Sym.: Column 1 symbols, 49 CFR 172.101(b).
  • Description: Column 2, the proper shipping name, 172.101(c).
  • Class: Column 3, hazard class or division, 172.101(d).
  • PG: Column 5, packing group, 172.101(f).
  • Labels: Column 6, label codes, 172.101(g).
  • Special provisions: Column 7, codes explained in 49 CFR 172.102, 172.101(h).
  • 8A / 8B / 8C: Packaging exceptions, non-bulk and bulk sections of 49 CFR part 173 (an entry of 202 means 173.202), 172.101(i).
  • 9A / 9B: Maximum quantity per package on passenger aircraft or rail, and on cargo aircraft only, 172.101(j).
  • 10A / 10B: Vessel stowage location and other stowage and handling codes, 172.101(k).

Division 4.2 — Spontaneously Combustible Material

See the full class list

Spontaneously combustible material (Division 4.2) includes a pyrophoric material — a liquid or solid that, even in small quantities and without an external ignition source, can ignite within five minutes after coming in contact with air — and self-heating material.

Source: 49 CFR 173.124 (eCFR).

Previous / next UN number

UN2317Sodium cuprocyanide, solutionUN2319Terpene hydrocarbons, n.o.s.

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View the full Class 4.2 list →

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