UN/NA Number Reference
DOT Class 4.2 Spontaneously Combustible placard

UN 2210: Maneb or maneb preparations

49 CFR 172.101 Hazardous Materials Table·ERG 2024

DOT Classification and Shipping

UN 2210 is assigned the proper shipping name Maneb or maneb preparations 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 III. 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

Maneb is a yellow powder or crystalline solid. It is denser than water. Contact may irritate skin, eyes and mucous membranes. It may be toxic by ingestion. Likely to generate heat spontaneously upon exposure to air or water. May be sufficient to ignite the material. Maneb is used as a fungicide. Formulations of Maneb include mixing it with many other chemicals such as sulfur, zinc oxide and others to desensitize it. This is done to make it easer for application.

CAS Number: 12427-38-2
Molecular Formula: C4H6MnN2S4
Molecular Weight: 265.3 g/mol
Color / Form: Yellow powder; crystals from alcohol
Odor: Practically odorless
Melting Point: 200 °C (decomposes)
Specific Gravity: 1.92
Vapor Pressure: 0.00000008 mmHg
Vapor Density: 1.92 (heavier than air)
Water Solubility: For more Solubility (Complete) data for Maneb (6 total), please visit the HSD...

Regulatory Data

CERCLA RQ (40 CFR 302.4)
1 lb

A release of this material at or above its CERCLA reportable quantity (1 lb) requires immediate notification to the National Response Center at 800-424-8802.

Special Provisions

49 CFR 172.102 special provision codes for this entry: 57, A1, A19, IB6, T1, TP33, W100. 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 2210 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.