International Chemical Safety Cards

POTASSIUM ARSENATE ICSC: 1210

POTASSIUM ARSENATE
Potassium dihydrogen arsenate
Potassium arsenate, monobasic
Potassium acid arsenate
KH2AsO4
Molecular mass: 180.0
CAS # 7784-41-0
RTECS # CG1100000
ICSC # 1210
UN # 1677
EC # 033-005-00-1
TYPES OF
HAZARD/
EXPOSURE 		ACUTE HAZARDS/
SYMPTOMS 		PREVENTION FIRST AID/
FIRE FIGHTING
FIRE Not combustible. Gives off irritating or toxic fumes (or gases) in a fire.

In case of fire in the surroundings: all extinguishing agents allowed.
EXPLOSION


 
EXPOSURE
PREVENT DISPERSION OF DUST! AVOID ALL CONTACT!
IN ALL CASES CONSULT A DOCTOR!
INHALATION Cough. Headache. Laboured breathing. Weakness (see Ingestion).
Closed system and ventilation.
Fresh air, rest. Refer for medical attention.
SKIN MAY BE ABSORBED! Redness. Pain.
Protective gloves. Protective clothing.
Remove contaminated clothes. Rinse and then wash skin with water and soap. Refer for medical attention.
EYES Redness. Pain.
Safety goggles, face shield, or eye protection in combination with breathing protection if powder.
First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
INGESTION Abdominal pain. Burning sensation. Diarrhoea. Vomiting.
Do not eat, drink, or smoke during work. Wash hands before eating.
Rinse mouth. Refer for medical attention.
SPILLAGE DISPOSAL STORAGE PACKAGING & LABELLING
Do NOT wash away into sewer. Vacuum spilled material. Carefully collect remainder, then remove to safe place (extra personal protection: P3 filter respirator for toxic particles).
Separated from acids, food and feedstuffs. Cool. Well closed. Keep in a well-ventilated room.
Unbreakable packaging; put breakable packaging into closed unbreakable container. Do not transport with food and feedstuffs.
T symbol
R: 45-23/25
S: 53-45
Note: A; Note: E
UN Hazard Class: 6.1
UN Packing Group: II
Marine pollutant.
SEE IMPORTANT INFORMATION ON BACK
ICSC: 1210 Prepared in the context of cooperation between the International Programme on Chemical Safety & the Commission of the European Communities © IPCS CEC 1993

International Chemical Safety Cards

POTASSIUM ARSENATE ICSC: 1210

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PHYSICAL STATE; APPEARANCE:
ODOURLESS, COLOURLESS OR WHITE CRYSTALS OR POWDER.

PHYSICAL DANGERS:


CHEMICAL DANGERS:
The substance decomposes on heating producing toxic fumes of arsenic (see ICSC # 0013). Reacts with acids releasing toxic arsine gas (see ICSC # 0222). Attacks many metals in presence of water such as iron, aluminium and zinc, releasing toxic fumes of arsenic and arsine.

OCCUPATIONAL EXPOSURE LIMITS (OELs):
TLV (as As): ppm; 0.2 mg/m3 (ACGIH 1991-1992).


ROUTES OF EXPOSURE:
The substance can be absorbed into the body by inhalation of its aerosol, through the skin and by ingestion.

INHALATION RISK:
Evaporation at 20°C is negligible; a harmful concentration of airborne particles can, however, be reached quickly by dispersing.

EFFECTS OF SHORT-TERM EXPOSURE:
The substance and the aerosol irritate the eyes, the skin and the respiratory tract. The substance may cause effects on the mucous membranes , resulting in haemorrhages, losses of fluids and electrolytes. Exposure may result in death. The effects may be delayed. Medical observation is indicated.

EFFECTS OF LONG-TERM OR REPEATED EXPOSURE:
Repeated or prolonged contact with skin may cause dermatitis. Repeated or prolonged contact may cause skin sensitization. The substance may have effects on the peripheral nervous system, skin, mucous membranes, and liver , resulting in neuropathy, pigmentation disorders, perforation of nasal septum, cirrhosis. This substance is carcinogenic to humans.
PHYSICAL
PROPERTIES
 Melting point: 288°C
Relative density (water = 1): 2.9		 Solubility in water: good
ENVIRONMENTAL
DATA
 This substance may be hazardous to the environment; special attention should be given to water, water and soil organisms. It is strongly advised not to let the chemical enter into the environment because it persists in the environment.
N O T E S
Macquer's salt is another synonym of potassium arsenate. Temperature of decomposition unknown in literature. Do NOT take working clothes home.
ADDITIONAL INFORMATION


ICSC: 1210 POTASSIUM ARSENATE
© IPCS, CEC, 1993
IMPORTANT LEGAL NOTICE: Neither the CEC or the IPCS nor any person acting on behalf of the CEC or the IPCS is responsible for the use which might be made of this information. This card contains the collective views of the IPCS Peer Review Committee and may not reflect in all cases all the detailed requirements included in national legislation on the subject. The user should verify compliance of the cards with the relevant legislation in the country of use.