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ARSENIC ACID (80% in water)ICSC: 1625
Arsenic acid hemihydrate
ortho-Arsenic acid solution
April 2017
CAS #: 7778-39-4
UN #: 1553
EC Number: 231-901-9

  ACUTE HAZARDS PREVENTION FIRE FIGHTING
FIRE & EXPLOSION         In case of fire in the surroundings, use appropriate extinguishing media.   

 AVOID ALL CONTACT! IN ALL CASES CONSULT A DOCTOR! 
  SYMPTOMS PREVENTION FIRST AID
Inhalation Cough. Burning sensation. Sore throat. Shortness of breath. Further see Ingestion.  Use closed system or ventilation.  Fresh air, rest. Refer for medical attention. 
Skin Redness. Pain. Skin burns.  Protective gloves. Protective clothing.  Remove contaminated clothes. Rinse skin with plenty of water or shower. Refer for medical attention . 
Eyes Redness. Pain. Burns.  Wear face shield.  First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention. 
Ingestion Metallic taste. Sore throat. Severe thirst. Abdominal pain. Nausea. Vomiting. Diarrhoea. Muscle cramps. Convulsions. Increased heart rate. Shock or collapse. Paralysis.  Wash hands before eating. Do not eat, drink, or smoke during work.  Rinse mouth. Refer for medical attention . 

SPILLAGE DISPOSAL CLASSIFICATION & LABELLING
Evacuate danger area! Consult an expert! Personal protection: complete protective clothing including self-contained breathing apparatus. Do NOT let this chemical enter the environment. Collect leaking and spilled liquid in sealable plastic containers as far as possible. Absorb remaining liquid in sand or inert absorbent. Then store and dispose of according to local regulations. 

According to UN GHS Criteria

skull;toxiccorrcancer;health hazenviro;aqua
DANGER
Toxic if swallowed or if inhaled
Harmful in contact with skin
Causes severe skin burns and eye damage
May cause cancer
Causes damage to organs
Causes damage to organs through prolonged or repeated exposure
Very toxic to aquatic life with long lasting effects 

Transportation
UN Classification
UN Hazard Class: 6.1; UN Pack Group: I 

STORAGE
Store in an area without drain or sewer access. Separated from strong oxidants, strong bases, metals, strong reducing agents and food and feedstuffs. Do NOT store or transport in containers made from aluminium, copper, iron or zinc. 
PACKAGING
Unbreakable packaging.
Put breakable packaging into closed unbreakable container.
Do not transport with food and feedstuffs. 
ARSENIC ACID (80% in water) ICSC: 1625
PHYSICAL & CHEMICAL INFORMATION

Physical State; Appearance
COLOURLESS-TO-PALE-GREEN-VISCOUS LIQUID. 

Physical dangers
 

Chemical dangers
Decomposes on heating. This produces toxic and corrosive fumes. The substance is a strong oxidant. It reacts with combustible and reducing materials. The substance is a medium strong acid. Attacks metals. This produces toxic and flammable arsine (see ICSC 0222). 

Formula: H3AsO4
Molecular mass: 141.9
Boiling point: 120°C (calculated)
Melting point: -30°C (calculated)
Solubility in water at 20°C: very good
Relative density (water = 1): 1.9 (calculated)
Vapour pressure, kPa at 15°C: 1.3  


EXPOSURE & HEALTH EFFECTS

Routes of exposure
Serious local effects by all routes of exposure. 

Effects of short-term exposure
The substance is corrosive to the eyes, skin and respiratory tract. The substance may cause effects on the blood, cardiovascular system, gastrointestinal tract, liver and nervous system. The effects may be delayed. See Notes. 

Inhalation risk
A harmful contamination of the air can be reached very quickly on evaporation of this substance at 20°C on spraying. 

Effects of long-term or repeated exposure
The substance may have effects on the peripheral nervous system, skin and cardiovascular system. This may result in polyneuropathy and skin lesions. This substance is carcinogenic to humans. 


OCCUPATIONAL EXPOSURE LIMITS
MAK: skin absorption (H); carcinogen category: 1; germ cell mutagen group: 3A 

ENVIRONMENT
The substance is very toxic to aquatic organisms. The substance may cause long-term effects in the aquatic environment. 

NOTES
Depending on the degree of exposure, periodic medical examination is suggested.
The symptoms of acute poisoning do not become manifest until hours.
Do NOT take working clothes home.
Another CAS number used is 1327-52-2. Arsenic acid hemihydrate has CAS number 7774-41-6. Arsenic acid (hemihydrate) is a colourless to white hygroscopic solid. It decomposes at 160°C (loss of water); melting point 35°C; relative density 2-2.5; very soluble in water. UN number 1554. 

ADDITIONAL INFORMATION
  EC Classification
Symbol: T, N; R: 45-23/25-50/53; S: 53-45-60-61; Note: A, E 

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    See Also:
       Toxicological Abbreviations