UN/NA 1929 · Potassium dithionite

Material name

1929 on a placard, orange panel or shipping paper

It can stand for any of three ERG 2024 entries: “Potassium dithionite”, “Potassium hydrosulfite” and “Potassium hydrosulphite”. All use Guide 135, so the number alone is enough to find the guide. On a numbered orange panel, 1929 is the lower number (how to read an orange panel).

ERG 2024 markings for 1929

1929 is highlighted in green, so ERG 2024 Table 1 (Initial Isolation and Protective Action Distances) has an entry for it: “Potassium dithionite (when spilled in water)”. Hazora shows those distances in the app, not on this page. “When spilled in water” means the material produces large amounts of toxic inhalation hazard (TIH) gases when spilled in water. Table 2 (Water-Reactive Materials Which Produce Toxic Gases) lists the gases produced: H2S (hydrogen sulfide) and SO2 (sulfur dioxide). Its guide number 135 has no P.

Entries near 1929

By number (yellow pages): before 1929 come UN/NA 1922 Pyrrolidine (Guide 132); UN/NA 1923 Calcium dithionite (Guide 135) and UN/NA 1928 Methyl magnesium bromide in ethyl ether (Guide 138); after it, UN/NA 1931 Zinc dithionite (Guide 171); UN/NA 1932 Zirconium scrap (Guide 135) and UN/NA 1935 Cyanide solution, n.o.s. (Guide 157).

By name (blue pages): “Potassium dithionite” comes after Potassium cyanide, solid (UN/NA 1680, Guide 157) and Potassium cyanide, solution (UN/NA 3413, Guide 157) and before Potassium fluoride, solid (UN/NA 1812, Guide 154) and Potassium fluoride, solution (UN/NA 3422, Guide 154).

By name (blue pages): “Potassium hydrosulfite” comes after Potassium hydrogen sulfate (UN/NA 2509, Guide 154) and Potassium hydrogen sulphate (UN/NA 2509, Guide 154) and before Potassium hydroxide, solid (UN/NA 1813, Guide 154) and Potassium hydroxide, solution (UN/NA 1814, Guide 154).

By name (blue pages): “Potassium hydrosulphite” comes after Potassium hydrogen sulfate (UN/NA 2509, Guide 154) and Potassium hydrogen sulphate (UN/NA 2509, Guide 154) and before Potassium hydroxide, solid (UN/NA 1813, Guide 154) and Potassium hydroxide, solution (UN/NA 1814, Guide 154).

Other names starting with “Potassium”: Potassium chlorate (UN/NA 1485, Guide 140); Potassium chlorate, aqueous solution (UN/NA 2427, Guide 140); Potassium cuprocyanide (UN/NA 1679, Guide 157); Potassium fluoroacetate (UN/NA 2628, Guide 151); Potassium fluorosilicate (UN/NA 2655, Guide 151) and Potassium hydrogen difluoride, solid (UN/NA 1811, Guide 154).

Guide 135 · Library

Guide 135 covers 54 UN/NA numbers. The 12 around 1929 in the guide’s number order: UN/NA 1384 Sodium dithionite; UN/NA 1385 Sodium sulfide, anhydrous; UN/NA 1386 Seed cake, with more than 1.5% oil and not more than 11% moisture; UN/NA 1854 Barium alloys, pyrophoric; UN/NA 1855 Calcium, pyrophoric; UN/NA 1923 Calcium dithionite; UN/NA 1932 Zirconium scrap; UN/NA 2002 Celluloid, scrap; UN/NA 2004 Magnesium diamide; UN/NA 2006 Plastics, nitrocellulose-based, self-heating, n.o.s.; UN/NA 2008 Zirconium powder, dry; UN/NA 2009 Zirconium, dry, finished sheets, strip or coiled wire.

Sources

• PHMSA · ERG 2024 · EN / ES / FR