HYDROGEN PEROXIDE AND PEROXYACETIC ACID MIXTURE, WITH ACID(S), WATER AND NOT MORE THAN 5% PEROXYACETIC ACID, STABILIZED

Diamond	Hazard	Value	Description
2 3 4 ox	Health	3	Can cause serious or permanent injury.
	Flammability	2	Must be moderately heated or exposed to relatively high ambient temperatures before ignition can occur.
	Instability	4	Readily capable of detonation or explosive decomposition or explosive reaction at normal temperatures and pressures.
	Special	OX	Possesses oxidizing properties.

A colorless liquid. Contact may severely irritate the skin, eyes, and mucous membranes. Decomposes violently on contact with many metals. Contact with combustible materials may result in spontaneous ignition. Under prolonged exposure to fire or heat containers may rupture violently and rocket.

• Explosive
• Strong Oxidizing Agent

Soluble in water.

Excerpt from 140 [Oxidizers]:

These substances will accelerate burning when involved in a fire. Some may decompose explosively when heated or involved in a fire. May explode from heat or contamination. Some will react explosively with hydrocarbons (fuels). May ignite combustibles (wood, paper, oil, clothing, etc.). Containers may explode when heated. Runoff may create fire or explosion hazard. (ERG, 2020)

Excerpt from 140 [Oxidizers]:

Inhalation, ingestion or contact (skin, eyes) with vapors or substance may cause severe injury, burns or death. Fire may produce irritating, corrosive and/or toxic gases. Runoff from fire control or dilution water may cause environmental contamination. (ERG, 2020)

HYDROGEN PEROXIDE (especially highly concentrated solutions) is a strong oxidizing agent. Enough energy is released during the catalytic decomposition of 65% aqueous hydrogen peroxide releases enough heat to evaporate all water and ignite nearby combustible materials. Most cellulose materials furnish enough catalyst to cause spontaneous ignition in contact with 90% aqueous hydrogen peroxide. Contamination of concentrated hydrogen peroxide solutions can cause an explosion. Readily oxidizable materials, or alkaline substances containing heavy metals may react violently. Solvents (acetone, ethanol, glycerol) can cause detonations when mixed with hydrogen peroxide solutions of over 30% concentration. The violence of the event increases with concentration. Concentrated hydrogen peroxide may decompose violently in contact with iron, copper, chromium, and most other metals or their salts, and dust (which frequently contain rust). During concentration under vacuum of aqueous or of aqueous-alcoholic solutions of hydrogen peroxide, violent explosions occurred when the concentration was sufficiently high (>90%) [Bretherick 2nd ed. 1979]. Mixtures of strong hydrogen peroxide with alcohols and concentrated sulfuric acid can cause explosions. Example: An explosion will occur if dimethylbenzylcarbinol is added to 90% hydrogen peroxide and then acidified with concentrated sulfuric acid. Mixtures of ethyl alcohol with concentrated hydrogen peroxide form powerful explosives. Mixtures of hydrogen peroxide and 1-phenyl-2-methyl propyl alcohol tend to explode if acidified with 70% sulfuric acid [Chem. Eng. News 45(43):73(1967); J, Org. Chem. 28:1893(1963)]. Hydrogen selenide and hydrogen peroxide undergo a very rapid decomposition [Mellor 1:941(1946-1947)]. PEROXYACETIC ACID should be handled only in small quantities and with extreme care when pure or very concentrated. May explode during distillation, even under reduced pressure [NFPA 1991]. A very strong oxidizing agent.

• Acids, Strong Oxidizing
• Peroxides, Organic
• Oxidizing Agents, Strong
• Water and Aqueous Solutions

Use caution: Liquids with this reactive group classification have been known to react with the absorbents listed below.

• Cellulose-Based Absorbents
• Expanded Polymeric Absorbents

Excerpt from 140 [Oxidizers]:

IMMEDIATE PRECAUTIONARY MEASURE: Isolate spill or leak area in all directions for at least 50 meters (150 feet) for liquids and at least 25 meters (75 feet) for solids.

LARGE SPILL: Consider initial downwind evacuation for at least 100 meters (330 feet).

FIRE: If tank, rail car or tank truck is involved in a fire, ISOLATE for 800 meters (1/2 mile) in all directions; also, consider initial evacuation for 800 meters (1/2 mile) in all directions. If ammonium nitrate is in a tank, rail car or tank truck and involved in a fire, ISOLATE for 1600 meters (1 mile) in all directions; also, initiate evacuation including emergency responders for 1600 meters (1 mile) in all directions. (ERG, 2020)

Excerpt from 140 [Oxidizers]:

SMALL FIRE: Use water. Do not use dry chemicals or foams. CO2 or Halon® may provide limited control.

LARGE FIRE: Flood fire area with water from a distance. Do not move cargo or vehicle if cargo has been exposed to heat. If it can be done safely, move undamaged containers away from the area around the fire.

FIRE INVOLVING TANKS OR CAR/TRAILER LOADS: Fight fire from maximum distance or use unmanned master stream devices or monitor nozzles. Cool containers with flooding quantities of water until well after fire is out. ALWAYS stay away from tanks engulfed in fire. For massive fire, use unmanned master stream devices or monitor nozzles; if this is impossible, withdraw from area and let fire burn. (ERG, 2020)

Excerpt from 140 [Oxidizers]:

Keep combustibles (wood, paper, oil, etc.) away from spilled material. Do not touch damaged containers or spilled material unless wearing appropriate protective clothing. Stop leak if you can do it without risk. Do not get water inside containers.

SMALL DRY SPILL: With clean shovel, place material into clean, dry container and cover loosely; move containers from spill area.

SMALL LIQUID SPILL: Use a non-combustible material like vermiculite or sand to soak up the product and place into a container for later disposal.

LARGE SPILL: Dike far ahead of liquid spill for later disposal. (ERG, 2020)

Excerpt from ERG Guide 140 [Oxidizers]:

Wear positive pressure self-contained breathing apparatus (SCBA). Wear chemical protective clothing that is specifically recommended by the manufacturer when there is NO RISK OF FIRE. Structural firefighters' protective clothing provides thermal protection but only limited chemical protection. (ERG, 2020)

Normalized Breakthrough Times (in Minutes)

Chemical	CAS Number	State	QS	QC	SL	C3	TF	TP	RC	TK	RF
Hydrogen peroxide (30%)	7722-84-1	Liquid		>480	>480				>480	>480
Hydrogen peroxide (50%)	7722-84-1	Liquid		>480		>480	>480	>480
Hydrogen peroxide (70%)	7722-84-1	Liquid	>480	>480			>480	>480	>480	>480	>480
Peracetic Acid (32%)	79-21-0	Liquid			272	>480	>480

Special Warning from DuPont: Tychem® and Tyvek® fabrics should not be used around heat, flames, sparks or in potentially flammable or explosive environments. Only...

(DuPont, 2023)

Excerpt from 140 [Oxidizers]:

Call 911 or emergency medical service. Ensure that medical personnel are aware of the material(s) involved and take precautions to protect themselves. Move victim to fresh air if it can be done safely. Give artificial respiration if victim is not breathing. Administer oxygen if breathing is difficult. Remove and isolate contaminated clothing and shoes. Contaminated clothing may be a fire risk when dry. In case of contact with substance, immediately flush skin or eyes with running water for at least 20 minutes. Keep victim calm and warm. (ERG, 2020)

• HYDROGEN PEROXIDE AND PEROXYACETIC ACID MIXTURE, WITH ACID(S), WATER AND NOT MORE THAN 5% PEROXYACETIC ACID, STABILIZED