Ammonium arsenate

  • Diammonium arsenate
Formula
(NH4)2HAsO4
Structure
Description
A white crystalline solid.

Registry Numbers and Inventories.
CAS
7784-44-3
EC (EINECS/ELINCS)
232-067-9
RTECS
CG0850000
RTECS class
Other
UN (DOT)
1546
Beilstein/Gmelin
133802 (G)
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
AsH12N3O4
Formula mass
176.03
Density
2.0 g/cm3 (20 C)
Solubility in water
Soluble

Hazards and Protection.
Storage
Keep in a cool, dry, dark location in a tightly sealed container or cylinder. Keep away from incompatible materials, ignition sources and untrained individuals. Secure and label area. Protect containers/cylinders from physical damage.
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
Protective gloves and clothing. Face shield or eye protection in combination with breathing protection if in powdered form.
Respirators
Wear positive pressure self-contained breathing apparatus (SCBA).
Small spills/leaks
Keep material out of water sources and sewers. Land spill: Dig a pit, pond, lagoon, holding area to contain liquid or solid material. Cover solids with a plastic sheet to prevent dissolving in rain or fire fighting water. Dike surface flow using soil, sand bags, foamed polyurethane, or foamed concrete. Water spill: Use natural barriers or oil spill control booms to limit spill travel. Use natural deep water pockets, excavated lagoons, or sand bag barriers to trap material at bottom. Remove trapped material with suction hoses.
Stability
No data.

Fire.
Fire fighting
Extinguish fire using agent suitable for type of surrounding fire. (Material itself does not burn or burns with difficulty.) Use water in flooding quantities as fog. Use alcohol foam, dry chemical or carbon dioxide.
Fire potential
Non-Combustible
Hazards
Containers may explode when heated. Runoff may pollute waterways.
Combustion products
Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes.

Health.
Exposure limit(s)
TLV (as As): ppm; 0.2 mg/m3 (ACGIH 1991-1992).
Carcinogin
O, G-A1, I-1, N-1, CP65
Exposure effects
May cause malformation in human babies.
   Ingestion
Abdominal pain, diarrhea, vomiting. See inhalation.
   Inhalation
Actue effects - Cough, sore throat, headache, burning sensation in the throat and chest, labored breathing, weakness, shock or collapse. Irritates the eyes, skin and respiratory tract. May cause effects on the gastrointestinal tract, central nervous and cardiovascular systems and kidneys, resuling in severe gastroenteritis, loss of fluids and electrolytes, shock, cardiac disorders, kidney impairment. Exposure above OEL may result in death. Effects may be delayed.<BR>Chronic effects - dermatitis, skin sensitization. May have effects on the skin, mucous membranes, peripheral nervous system, bone marrow and liver, resulting in pigmentation disorders, perforation of the nasal septum, neuropathy, liver impairment. Carcinogenic to humans.
   Skin
Redness.
   Eyes
Redness, pain.

First aid
 
   Ingestion
Seek medical assistance.
   Inhalation
Move victim to fresh air. Apply artificial respiration if victim is not breathing. Do not use mouth-to-mouth method if victim ingested or inhaled the substance; induce artificial respiration with the aid of a pocket mask equipped with a one-way valve or other proper respiratory medical device. Administer oxygen if breathing is difficult.
   Skin
Remove and isolate contaminated clothing and shoes. Remove material from skin immediately. Immediately flush with running water for at least 20 minutes. For minor skin contact, avoid spreading material on unaffected skin.
   Eyes
Immediately flush with running water for at least 20 minutes.

Transport.
UN number
1546
Response guide
Hazard class
6.1
Packing Group
II
 
Std. Transport #
4923201