Peroxyacetic acid

  • Peracetic acid
  • Ethaneperoxoic acid
  • Ethaneperoxoic acid
  • Acetyl hydroperoxide
Formula
CH3COOOH
Structure
Description
Colorless liquid with a strong, pungent acrid odor.
Uses
Bactericide & fungicide, especially in food processing, reagent in making caprolactam, synthetic glycerol.

Registry Numbers and Inventories.
CAS
79-21-0
EC (EINECS/ELINCS)
201-186-8
EC Index Number
607-094-00-8
EC Class
Flammable; Oxidising; Harmful; Corrosive; Dangerous for the Environment
RTECS
SD8750000
RTECS class
Agricultural Chemical and Pesticide; Tumorigen; Primary Irritant
UN (DOT)
2131
Merck
12,7293
Beilstein/Gmelin
1098464
Beilstein Reference
4-02-00-00390
EPA OPP
63201
Swiss Giftliste 1
G-2709
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed

Properties.
Formula
C2H4O3
Formula mass
76.05
Melting point, °C
0.1
Boiling point, °C
105
Vapor pressure, mmHg
7.9 (25 C)
Density
1.1037 g/cm3 (20 C)
Solubility in water
Very soluble
Viscosity
3.280 cp @ 78 deg f
Refractive index
1.3994 (15 C)
pKa/pKb
8.20 (pKa)
Heat of vaporization
44.25 kJ/mol

Hazards and Protection.
Storage
Store in a cool, dry, well-ventilated location. Separate from acids, alkalies, organic materials, heavy metals. Normally kept refrigerated outside or detached storage is preferred.
Handling
All chemicals should be considered hazardous. Avoid direct physical contact. Use appropriate, approved safety equipment. Untrained individuals should not handle this chemical or its container. Handling should occur in a chemical fume hood.
Protection
Full protective clothing (goggles, rubber gloves, etc)
Respirators
Self-contained breathing apparatus.
Small spills/leaks
Caution : Peracetic acid is a strong oxidizer. Fire or other violent reactions may occur upon contact with combustible organic material. Avoid breathing vapors. Do not touch the spilled material; shut off all ignition sources and stop the leak if this can be done without risk. The spilled material should be absorbed with a noncombustible absorbent such as vermiculite. Sweep up and place in a metal container for immediate disposal. Do not use spark-generating metals or organic materials for sweeping up or handling spilled material. Dispose of the absorbed peroxyacetic acid solution, in small quantities at a time, by placing it on the ground in a remote outdoor area and igniting with a long torch. Empty containers should be washed with a 10% sodium hydroxide solution.
Stability
Thermally unstable. After 30 days the specific formulations peracetic acid 20 gl, peracetic acid n 20 gl (with wetting agent), and peracetic acid spirit show a loss of peracetic acid of 25, 35, 22%, respectively, with storage at 2-5 degrees.
Decomposition
Decomposes violently @ 230 F (110 C) peracetic acid diluted with 60% acetic acid when heated to decomposition it emits acrid smoke and irritating fumes.

Fire.
Flash Point,°C
40.5
Autoignition, °C
200
Fire fighting
If fire occurs in the vicinity of this compound, water should be used to keep containers cool. Cleanup and salvage operations should not be attempted until all of the peroxyacetic acid solution has cooled completely. Keep unnecessary people away; wear self-contained breathing apparatus and full protective clothing.Fight fires from an explosion-resistant location. In advanced or massive fires, area should be evacuated. For small fires: use dry chemical, carbon dioxide, water spray, or foam. For large fires: flood area with water.
Fire potential
Flammable liquid. Dangerous fire hazard by chemical reaction with reducing agents or exposure to heat.
Hazards
Decomposes violently at 230F. When heated to decomposition, this compound emits acrid smoke and fumes. Runoff to sewer may create a fire or explosion hazard. Powerful oxidizer. Isolate from other stored material, particularly accelerators, oxidizers, and organic or flammable materials. Avoid shock and heat.
Combustion products
Fire may produce irritating, corrosive and/or toxic gases.
Health
3
 
Flammability
2
 
 
Reactivity
4
 
 
Special
O

Health.
Poison_Class
2
Exposure effects
An increase in blood pressure, respiratory rate and pulse has been noted in animal experiments. No data were available to assess the teratogenic potential of this agent. <br>No data were available to assess the potential effects of exposure to this agent during pregnancy or lactation.
   Ingestion
Ingestion of peracetic acid may cause gastrointestinal tract irritation and possible oral and esophageal burns.
   Inhalation
Mice exposed by inhalation developed signs of respiratory tract irritation.
   Skin
Peracetic acid is highly irritating and possibly corrosive to the skin.
   Eyes
Peracetic acid can cause severe eye irritation. A 10 percent solution of peracetic acid applied to rabbit eyes caused corneal ulceration, perforation, and symblepharon formation. Irritation of nasal and throat mucosa is common with exposure to vapors.

First aid
 
   Ingestion
Seek medical assistance.
   Inhalation
Move victim to fresh air. Apply artificial respiration if victim is not breathing. Administer oxygen if breathing is difficult.
   Skin
Remove contaminated clothing and wash exposed area thoroughly with soap and water. A physician should examine the area if irritation or pain persists.
   Eyes
Irrigate exposed eyes with copious amounts of tepid water for at least 15 minutes. If irritation, pain, swelling, lacrimation, or photophobia persist, the patient should be seen in a health care facility.

Transport.
UN number
2131
Response guide
Hazard class
5.2
USCG CHRIS Code
PAA