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HomeUN NumbersClass 8UN1831
Hazard Class 8Packing Group I

UN Number

UN1831

Sulfuric acid, fuming with less than 30 percent free sulfur trioxide

Official source: 49 CFR 172.101 (eCFR)

Hazardous Materials Table entry

2 rows in 49 CFR 172.101 for UN1831.

Sym.DescriptionClassPGLabelsSpecial provisions8A8B8C9A9B10A10B
—Sulfuric acid, fuming with less than 30 percent free sulfur trioxide8I8A7, N34, T20, TP2,TP13None201243Forbidden2.5 LC14, 40, 53, 58
—Sulfuric acid, fuming with 30 percent or more free sulfur trioxide8I8, 6.12, B9, B14, B32, B77, B84, N34, T20, TP2, TP12, TP13None227244ForbiddenForbiddenC53, 58
  • 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).

Class 8 — Corrosive Material

See the full class list

"Corrosive material" (Class 8) is a liquid or solid that causes irreversible damage to human skin at the site of contact within a specified period of time, or a liquid (or solid that may become liquid in transportation) with a severe corrosion rate on steel or aluminum.

Source: 49 CFR 173.136 (eCFR).

Previous / next UN number

UN1830Sulfuric acid with more than 51 percent acidUN1832Sulfuric acid, spent

Nearby Class 8 UN Numbers

UN1827Stannic chloride, anhydrousUN1828Sulfur chloridesUN1829Sulfur trioxide, stabilizedUN1833Sulfurous acidUN1835Tetramethylammonium hydroxide solutionUN1836Thionyl chloride
View the full Class 8 list →

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