Arsenic acid, diammonium salt
Ammonium arsenate
(NH4)2HAsO4
Molecular mass: 176.0
ICSC # 1207
CAS # 7784-44-3
RTECS # CG0850000
UN # 1546
EC # 033-005-00-1
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Types of Hazard/ Exposure
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Acute Hazards/ Symptoms
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Prevention
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First Aid/
Fire Fighting
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FIRE
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Not combustible.
Gives off irritating or toxic fumes (or gases) in a fire.
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In case of fire in the surroundings: use appropriate extinguishing media.
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Explosion
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Exposure
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PREVENT DISPERSION OF DUST!
AVOID ALL CONTACT!
AVOID Exposure OF (PREGNANT) WOMEN!
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IN ALL CASES CONSULT A DOCTOR!
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•Inhalation
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Cough.
Sore throat.
Headache.
Laboured breathing.
Weakness.
See Ingestion.
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Closed system and ventilation.
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Fresh air, rest.
Refer for medical attention.
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•Skin
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Redness.
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Protective gloves.
Protective clothing.
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Remove contaminated clothes.
Rinse and then wash skin with water and soap.
Refer for medical attention.
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•Eyes
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Redness.
Pain.
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Face shield
or
eye protection in combination with breathing protection if powder.
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First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
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•Ingestion
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Abdominal pain.
Diarrhoea.
Vomiting.
Burning sensation in the throat and chest.
Shock or collapse.
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Do not eat, drink, or smoke during work.
Wash hands before eating.
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Rinse mouth.
Give a slurry of activated charcoal in water to drink.
Induce vomiting (ONLY IN CONSCIOUS PERSONS!).
Refer for medical attention.
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Spillage Disposal
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Storage
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Packaging & Labelling
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Vacuum spilled material.
Carefully collect remainder,
then remove to safe place.
Do NOT let this chemical enter the environment.
Chemical protection suit including self-contained breathing apparatus.
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Separated from
acids,
food and feedstuffs
.
Well closed.
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Unbreakable packaging; put breakable packaging into closed unbreakable container.
Do not transport with food and feedstuffs.
Marine pollutant.
Note: A, E
T symbol
N symbol
R: 45-23/25-50/53
S: 53-45-60-61
UN Hazard Class: 6.1
UN Packing Group: II
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Important Data
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Physical State; Appearance:
COLOURLESS
CRYSTALS
, WITH CHARACTERISTIC ODOUR.
Physical Dangers:
Chemical Dangers:
The substance decomposes
on heating
producing
toxic fumes
including
ammonia
,
nitrogen oxides
and
arsenic fumes
.
Reacts
with
bases
to produce
ammonia
.
Attacks many metals in presence of water such as iron, aluminium and zinc, releasing toxic fumes of arsine (see ICSC 0222).
Occupational Exposure Limits:
TLV: (as As) 0.01 mg/m3 A1 (confirmed human carcinogen); BEI issued; (ACGIH 2004).
MAK:
Carcinogen category: 1; Germ cell mutagen group: 3A;
(DFG 2004).
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Routes of Exposure:
The substance can be absorbed into the body
by inhalation of its aerosol
and
by ingestion.
Inhalation Risk:
Evaporation at 20°C is negligible; a harmful concentration of airborne particles can, however, be reached quickly when dispersed.
Effects of Short-Term Exposure:
The substance
is irritating to
the eyes
,
the skin
and
the respiratory tract
.
The substance may cause effects on the
gastrointestinal tract
,
central nervous system
,
cardiovascular system
and
kidneys
, resulting in severe gastroenteritis, loss of fluids and electrolytes,
shock
,
cardiac disorders
and
kidney impairment
.
Exposure above the OEL may result in death.
The effects may be delayed.
Effects of Long-Term or Repeated Exposure:
Repeated or prolonged contact with skin may cause dermatitis.
The substance may have effects on the skin, mucous membranes,
peripheral nervous system
,
bone marrow
and
liver
, resulting in pigmentation disorders, perforation of nasal septum, neuropathy and
liver impairment
.
This substance is carcinogenic to humans.
Animal tests show that this substance possibly causes malformations in human babies.
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Physical
Properties
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Density: 2.0
g/cm3
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Solubility in water: good
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Environmental
Data
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This substance may be hazardous in the environment; special attention should be given to ground water contamination,aquatic organisms and soil organisms.
It is strongly advised that this substance does not enter the environment.
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N O T E S
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Depending on the degree of exposure, periodic medical examination is suggested.
Do NOT take working clothes home.
Card has been partly updated in April 2005. See sections Occupational Exposure Limits, Emergency Response.October 2005: see section Effects of long-term or repeated exposure.
Transport Emergency Card: TEC (R)-61GT5-II
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ADDITIONAL INFORMATION
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ICSC: 1207
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DIAMMONIUM HYDROGEN ARSENATE
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(C) IPCS, CEC, 1994
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IMPORTANT LEGAL NOTICE:
Neither NIOSH, the CEC or the IPCS nor any person acting on behalf of NIOSH,
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.
The only modifications made to produce the U.S. version is inclusion of the OSHA PELs, NIOSH RELs and NIOSH IDLH values.
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