UN/NA Number Reference

DOT Class 4.2 Spontaneously Combustible placard

UN 1385: Sodium sulfide, anhydrous

49 CFR 172.101 Hazardous Materials Table·ERG 2024

DOT Classification and Shipping

UN 1385 is assigned the proper shipping name Sodium sulfide, anhydrous in the U.S. DOT Hazardous Materials Table (49 CFR 172.101). It is classified as a Class 4.2 Spontaneously Combustible material, Packing Group II. Required label(s): 4.2.

Packing group indicates the degree of danger within a hazard class: PG I is high danger, PG II medium, PG III low. The proper shipping name, hazard class, UN number, and packing group together form the basic shipping description that must appear on shipping papers and, where required, on the package and placard.

Emergency Response (ERG Guide 135)

Hazards: Spontaneously combustible. May reignite after fire is extinguished. May burn rapidly.

Fire: Small: dry chemical, sand, earth. Large: flooding water. Do NOT use foam.

Spill: Do not touch. Cover with dry earth/sand. Do not get water on spilled substance.

Chemical and Physical Properties

Sodium sulfide, hydrated, with not less than 30% water appears as yellow-pink or white deliquescent crystals, flakes or lumps. Contains at least 30% water. Alkaline. Burns skin, eyes and mucous membranes. Mildly corrosive to most metals. May be toxic by skin absorption. Releases toxic hydrogen sulfide gas when mixed with an acid.

CAS Number: 1313-82-2

Molecular Formula: HNa2S+

Molecular Weight: 78.05 g/mol

Boiling Point: Very high

Specific Gravity: 1.856 (sinks in water)

Water Solubility: Slightly soluble in alcohol

Special Provisions

49 CFR 172.102 special provision codes for this entry: A19, A20, IB6, IP2, N34, T3, TP33, W31, W40. These codes modify the general requirements (packaging, quantity limits, exceptions) for this specific material. Look up each code in 49 CFR 172.102 for the full text.

Need the full interactive record? Open UN 1385 in the SpillNerd lookup tool for the live database entry with placard graphics, GHS pictograms, full segregation tables, and synonym search. For another material, use the UN number and chemical lookup.

Reference data compiled from the DOT Hazardous Materials Table (49 CFR 172.101), the 2024 Emergency Response Guidebook, and public chemical databases (PubChem, NIOSH, EPA). Always verify the correct shipping description against the current regulation and the manufacturer's SDS Section 14 before shipping.