UN/NA Number Reference

UN 2984: Hydrogen peroxide, aqueous solution

49 CFR 172.101 Hazardous Materials Table·ERG 2024

DOT Classification and Shipping

UN 2984 is assigned the proper shipping name Hydrogen peroxide, aqueous solution in the U.S. DOT Hazardous Materials Table (49 CFR 172.101). It is classified as a Class 5.1 Oxidizer material, Packing Group III. Required label(s): 5.1.

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 140)

Hazards: May cause fire or explosion. May accelerate burning. May explode from heat or contamination.

Fire: Use flooding water. Cool containers. Do not use dry chemical on large fires (ineffective).

Spill: Keep combustibles away. Do not touch. Use water spray to reduce dust.

Chemical and Physical Properties

Hydrogen peroxide, aqueous solution, stabilized, with more than 60% hydrogen peroxide appears as a colorless liquid. Vapors may irritate the eyes and mucous membranes. Under prolonged exposure to fire or heat containers may violently rupture due to decomposition. Used to bleach textiles and wood pulp, in chemical manufacturing and food processing.

CAS Number: 7722-84-1

Molecular Formula: H2O2

Molecular Weight: 34.015 g/mol

Color / Form: Colorless liquid

Odor: ... Slightly sharp odor ...

Boiling Point: 302.4 °F at 760 mmHg (NTP, 1992)

Melting Point: 31.3 °F (NTP, 1992)

Autoignition: Not flammable. (USCG, 1999)

Specific Gravity: 1.11 at 68 °F (NTP, 1992) - Denser than water; will sink

Vapor Pressure: 1 mmHg at 59.5 °F (NTP, 1992)

Vapor Density: 1.02 calculated (EPA, 1998) - Heavier than air; will sink (Relative to Air)

Water Solubility: greater than or equal to 100 mg/mL at 72 °F (NTP, 1992)

Log P: -1.36

pH: Weak acid; H2O2 concn wt% = 35, 50, 70, 90; corresponding true pH: 4.6, 4.3, 4.4, 5.1

Regulatory Data

CERCLA RQ (40 CFR 302.4)

1 lb

EPCRA TPQ (40 CFR 355)

1000 lb

OSHA PEL

TWA 1 ppm (1.4 mg/m 3 )

NIOSH REL

TWA 1 ppm (1.4 mg/m 3 )

IDLH

75 ppm

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: A1, IB2, IP5, T4, TP1, TP6, TP24, TP37. 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 2984 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.