Ammonium persulfate

  • Ammonium Peroxydisulfate
  • Diammonium peroxodisulfate
Formula
(NH4)2S2O8
Structure
Description
White crystals, odorless.
Uses
Used as a oxidizer and bleacher.

Registry Numbers and Inventories.
CAS
7727-54-0
EC (EINECS/ELINCS)
231-786-5
EC Index Number
016-060-00-6
EC Class
Oxidising; Harmful; Irritant; Sensitising
R 8 22 36/37/38 42/43
S 22 24 26 37
RTECS
SE0350000
RTECS class
Other
UN (DOT)
1444
Merck
13,545
Beilstein/Gmelin
47998 (G)
Swiss Giftliste 1
G-1115
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
H8N2O8S2
Formula mass
228.20
Melting point, °C
120
Decomposition point, °C
120
Vapor density (air=1)
7.9
Density
1.98 g/cm3 (20 C)
Solubility in water
800 g/L

Hazards and Protection.
Storage
Do not store near combustible materials. Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances. Keep away from metals. Keep away from reducing agents.
Handling
Wash thoroughly after handling. Use with adequate ventilation. Minimize dust generation and accumulation. Avoid contact with eyes, skin, and clothing. Keep container tightly closed. Avoid contact with clothing and other combustible materials. Avoid ingestion and inhalation. Wash clothing before reuse.
Protection
Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166. Skin: Wear appropriate gloves to prevent skin exposure. Clothing: Wear appropriate protective clothing to minimize contact with skin.
Respirators
Follow the OSHA respirator regulations found in 29CFR 1910.134 or European Standard EN 149. Always use a NIOSH or European Standard EN 149 approved respirator when necessary.
Small spills/leaks
Avoid runoff into storm sewers and ditches which lead to waterways. Clean up spills immediately, using the appropriate protective equipment. Sweep up, then place into a suitable container for disposal. Provide ventilation.
Stability
Substance is shock sensitive and thermally unstable. Decomposes when heated. May decompose on exposure to moist air or water.
Incompatibilities
Reducing agents, iron, sodium peroxide, powdered aluminum.
Decomposition
Nitrogen oxides, oxides of sulfur, ammonia and/or derivatives, nitrogen.

Fire.
Flash Point,°C
80
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Use water spray to keep fire-exposed containers cool. Oxidizer. Greatly increases the burning rate of combustible materials. This material in sufficient quantity and reduced particle size is capable of creating a dust explosion. May accelerate burning if involved in a fire. Containers may explode when heated. Extinguishing media: Cool containers with flooding quantities of water until well after fire is out. For small fires DO NOT use dry chemicals, carbon dioxide, halon or foams. USE WATER ONLY. For large fires, flood fire area with water from a distance.
Fire potential
Moderate fire hazard by reaction with reducing agents.
Hazards
May explode from heat or contamination. May react explosively with hydrocarbons (fuels). May ignite combustibles.
Combustion products
Toxic oxides of nitrogen and sulfuric acid fumes may form in fire.
Health
2
 
Flammability
1
 
 
Reactivity
1
 
 
Special
O

Health.
Exposure limit(s)
OEL-UNITED KINGDOM:TWA 1 mg/m3
Poison_Class
4
Exposure effects
Repeated or prolonged exposure may cause allergic reactions in sensitive individuals.
   Ingestion
Causes gastrointestinal irritation with nausea, vomiting and diarrhea. May be harmful if swallowed.
   Inhalation
Causes respiratory tract irritation. Inhalation may be fatal as a result of spasm, inflammation, edema of the larynx and bronchi, chemical pneumonitis and pulmonary edema.
   Skin
Causes skin irritation. May cause skin sensitization, an allergic reaction, which becomes evident upon re-exposure to this material.
   Eyes
Causes eye irritation.

First aid
 
   Ingestion
Do NOT induce vomiting. If victim is conscious and alert, give 2-4 cupfuls of milk or water. Never give anything by mouth to an unconscious person. Get medical aid.
   Inhalation
Remove from exposure to fresh air immediately. If breathing is difficult, give oxygen. Get medical aid if cough or other symptoms appear. DO NOT use mouth-to-mouth respiration. If breathing has ceased apply artificial respiration using oxygen and a suitable mechanical device such as a bag and a mask.
   Skin
Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Get medical aid if irritation develops or persists. Wash clothing before reuse.
   Eyes
Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid.

Transport.
UN number
1444
Response guide
Hazard class
5.1
Packing Group
III
 
USCG CHRIS Code
APE
 
HS Code
2833 40 00
 
Std. Transport #
4918706