UN/NA Number Reference
DOT Class 6.1 Toxic Substance placard

UN 2859: Ammonium metavanadate

49 CFR 172.101 Hazardous Materials Table·ERG 2024

DOT Classification and Shipping

UN 2859 is assigned the proper shipping name Ammonium metavanadate in the U.S. DOT Hazardous Materials Table (49 CFR 172.101). It is classified as a Class 6.1 Toxic Substance material, Packing Group II. Required label(s): 6.1.

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 154)

Hazards: TOXIC. Corrosive. Non-combustible but may decompose producing toxic fumes when heated.

Fire: Use agent appropriate for surrounding fire. Cool containers.

Spill: Do not touch. Avoid inhalation. Use water spray to reduce fumes.

Chemical and Physical Properties

Ammonium metavanadate appears as a white crystalline powder. Slightly soluble in water and denser than water. Decomposes at 410 °F. May release toxic fumes. Moderately toxic. An irritant. Used as a dryer for paints and inks, and for dyes. Loses ammonia upon heating.

CAS Number: 7803-55-6
Molecular Formula: H4NO3V
Molecular Weight: 116.978 g/mol
Color / Form: Orange powder
Boiling Point: >350 C
Melting Point: 200 °C (with decomposition)
Specific Gravity: 2.326 g/cu cm
Water Solubility: In water, 0.04 g/100 mL at 20 C
pH: <7.0 in aqueous solution (acts as an acid to neutralize bases)

Regulatory Data

CERCLA RQ (40 CFR 302.4)
1000 lb
RCRA Waste Code(s)
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A release of this material at or above its CERCLA reportable quantity (1000 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: IB8, IP2, IP4, T3, TP33. 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 2859 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.