Disodium arsenate

  • Sodium arsenate, dibasic
  • Sodium arsenate heptahydrate
  • Arsenic acid, disodium salt, heptahydrate
Formula
Na2(HAsO4)
Structure
Description
Odorless white crystals. Aqueous solution is alkaline to litmus.

Registry Numbers and Inventories.
CAS
10048-95-0
EC (EINECS/ELINCS)
231-902-4
RTECS
CG0900000
RTECS class
Tumorigen; Mutagen; Reproductive Effector
UN (DOT)
1685
Beilstein/Gmelin
37330 (G)
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed

Properties.
Formula
AsHNa2O4
Formula mass
185.90
Decomposition point, °C
180
Density
1.880 g/cm3
Solubility in water
39 g/100 ml (21 C)

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
If Tyvek-type disposable protective clothing is not worn during handling of this chemical, wear disposable Tyvek-type sleeves taped to your gloves.
Respirators
Wear a NIOSH-approved half face respirator equipped with an organic vapor/acid gas cartridge (specific for organic vapors, HCl, acid gas and SO2) with a dust/mist filter.
Small spills/leaks
If you spill this chemical, you should dampen the solid spill material with water, then transfer the dampened material to a suitable container. Use absorbent paper dampened with water to pick up any remaining material. Seal your contaminated clothing and the absorbent paper in a vapor-tight plastic bag for eventual disposal. Wash all contaminated surfaces with a soap and water solution. Do not reenter the contaminated area until the Safety Officer (or other responsible person) has verified that the area has been properly cleaned.
Stability
No data.
Incompatibilities
Incompatible with strong oxidizing agents and strong acids Incompatible with iron, aluminum and zinc in the presence of water.

Fire.
Fire fighting
Fires involving this material can be controlled with a dry chemical, carbon dioxide or Halon extinguisher.
Fire potential
This material is nonflammable
Combustion products
Fire may produce irritating, corrosive and/or toxic gases.

Health.
Exposure limit(s)
OSHA PEL: 1910.1018 TWA 0.010 mg/m3 NIOSH REL: Ca C 0.002 mg/m3 15-minute See Appendix A NIOSH IDLH: Potential occupational carcinogen 5 mg/m3 (as As)
Carcinogin
O, G-A1, I-1, N-1, CP65
Exposure effects
   Ingestion
Abdominal pain, burning sensation, diarrhea, vomiting.
   Inhalation
Acute effects - cough, headache, sore throat. Irritates the eyes, skin and respiratory tract. May cause effects on the cardiovascular system, gastrointenstinal tract and central nervous system, resulting in severe hemorrhages, loss of fluid and electrolytes, collapse, shock and death. Exposure may result in death. Effects may be delayed.<BR>Chronic effects - dermatitis, skin sensitization. May have effects on the mucous membranes, skin, liver, kidneys and peripheral nervous system, resulting in neuropathy, pigmentation disorders, perforation of the nasal septum and tissue lesions. Probably carcinogenic to humans.
   Skin
Redness, Pain.
   Eyes
Redness, pain.

First aid
 
   Ingestion
Seek medical assistance.
   Inhalation
IMMEDIATELY leave the contaminated area; take deep breaths of fresh air. IMMEDIATELY call a physician and be prepared to transport the victim to a hospital even if no symptoms (such as wheezing, coughing, shortness of breath, or burning in the mouth, throat, or chest) develop. Provide proper respiratory protection to rescuers entering an unknown atmosphere. Whenever possible, Self-Contained Breathing Apparatus (SCBA) should be used.
   Skin
IMMEDIATELY flood affected skin with water while removing and isolating all contaminated clothing. Gently wash all affected skin areas thoroughly with soap and water. IMMEDIATELY call a hospital or poison control center even if no symptoms (such as redness or irritation) develop. IMMEDIATELY transport the victim to a hospital for treatment after washing the affected areas.
   Eyes
First check the victim for contact lenses and remove if present. Flush victim's eyes with water or normal saline solution for 20 to 30 minutes while simultaneously calling a hospital or poison control center. Do not put any ointments, oils, or medication in the victim's eyes without specific instructions from a physician. IMMEDIATELY transport the victim after flushing eyes to a hospital even if no symptoms (such as redness or irritation) develop.

Transport.
UN number
1685
Response guide
Hazard class
6.1
Packing Group
II