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Chemical Datasheet


6.1 - Poison
Chemical Identifiers | Hazards | Response Recommendations | Physical Properties | Regulatory Information | Alternate Chemical Names

Chemical Identifiers

The Chemical Identifier fields include common identification numbers, the NFPA diamond U.S. Department of Transportation hazard labels, and a general description of the chemical. The information in CAMEO Chemicals comes from a variety of data sources.
CAS Number UN/NA Number DOT Hazard Label USCG CHRIS Code
  • 10048-95-0
  • Poison
NIOSH Pocket Guide International Chem Safety Card
Arsenic (inorganic compounds, as As)external link
NFPA 704
data unavailable
General Description
PHYSICAL DESCRIPTION: Odorless white crystals. Becomes anhydrous at 212°F. Aqueous solution is alkaline to litmus. (NTP, 1992)


The Hazard fields include special hazard alerts air and water reactions, fire hazards, health hazards, a reactivity profile, and details about reactive groups assignments and potentially incompatible absorbents. The information in CAMEO Chemicals comes from a variety of data sources.
Reactivity Alerts
Air & Water Reactions
Effloresces in warm air. Water soluble.
Fire Hazard
Literature sources indicate that this chemical is nonflammable. (NTP, 1992)
Health Hazard
SYMPTOMS: Symptoms of exposure to this class of compounds may include garlicky odor of the breath and feces, sweetish metallic taste, constriction of the throat, difficulty in swallowing, burning and colicky pains in the esophagus, stomach and bowel; vomiting, profuse and painful diarrhea (feces may become bloody), dehydration with intense thirst; muscular cramps, hematuria, albuminuria, glycosuria, sinus tachycardia and occasionally ventricular arrhythmias; cyanosis, feeble pulse, cold extremities, vertigo, headache, stupor, delirium, mania, syncope, coma, convulsions, general paralysis, ventricular fibrillation, peripheral neuropathy with sensory and motor involvement, severe gastritis or gastroenteritis, weakness, loss of fluid and electrolytes resulting in collapse, shock and death; muscle spasm, encephalopathy, mild gastrointestinal disturbances, anorexia, low-grade fever, pallor, inflammation of the nose, throat, eyes and larynx; stomatitis, salivation, skin afflictions such as erythema, eczema, pigmentation (arsenic melanosis), diffuse alopecia, keratosis (especially of the palms and soles), scaling and desquamation, brittle nails, white lines or bands in the nails (Mees lines), loss of hair and nails, and localized subcutaneous edema (especially of the eyelids); renal damage, hepatomegaly with jaundice (and sometimes pruritis) which may evolve into cirrhosis with ascites; idiopathic portal hypertension with bleeding esophageal varices in chronic poisonings; enteropathy, neonatal death and severe blood dyscrasias. Other symptoms may include cold and clammy skin, fall in blood pressure, circulatory failure, oliguria, anuria, restlessness, nausea, dizziness, chills, irritability, acute pulmonary edema, dyspnea, cough with foamy sputum, rales, polyneuritis, optic neuritis, anesthesias, burning pains in the hands and feet, bronzing of the skin, abdominal cramps, anemia, aplastic anemia and chronic nephritis. Exposure can cause inflammation of the mucous membranes; and irritation, redness and pain of the eyes and skin. Chronic exposure can cause hepatitis and damage to the cardiovascular system, central nervous system, liver and kidneys. Repeated or prolonged contact can result in lesions of the skin and perforation of the nasal septum. It can cause laryngitis, bronchitis, irritation of the nose and throat and unconsciousness. It can also cause nervousness and stomach irritation. Eye contact may result in conjunctivitis.

ACUTE/CHRONIC HAZARDS: This compound may be fatal if swallowed, inhaled or absorbed through the skin. It may cause irritation to the skin, eyes, nose and throat. When heated to decomposition it emits toxic fumes of arsenic oxides. (NTP, 1992)
Reactivity Profile
SODIUM ARSENATE HEPTAHYDRATE is incompatible with strong oxidizing agents and strong acids. Also incompatible with iron, aluminum and zinc in the presence of water. (NTP, 1992).

Sodium arsenate heptahydrate is a weak oxidizing agent, and may react with strong or weak reducing agents.
Belongs to the Following Reactive Group(s)
Potentially Incompatible Absorbents

No information available.

Response Recommendations

The Response Recommendation fields include isolation and evacuation distances, as well as recommendations for firefighting, non-fire response, protective clothing, and first aid. The information in CAMEO Chemicals comes from a variety of data sources.
Isolation and Evacuation
Excerpt from ERG Guide 151 [Substances - Toxic (Non-combustible)]:

As an immediate precautionary measure, isolate spill or leak area in all directions for at least 50 meters (150 feet) for liquids and at least 25 meters (75 feet) for solids.

SPILL: Increase, in the downwind direction, as necessary, the isolation distance shown above.

FIRE: If tank, rail car or tank truck is involved in a fire, ISOLATE for 800 meters (1/2 mile) in all directions; also, consider initial evacuation for 800 meters (1/2 mile) in all directions. (ERG, 2016)
Fires involving this material can be controlled with a dry chemical, carbon dioxide or Halon extinguisher. (NTP, 1992)
Non-Fire Response
SMALL SPILLS AND LEAKAGE: 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.

STORAGE PRECAUTIONS: You should store this chemical at ambient temperatures, and keep it away from oxidizing materials and acids. (NTP, 1992)
Protective Clothing
MINIMUM PROTECTIVE CLOTHING: If Tyvek-type disposable protective clothing is not worn during handling of this chemical, wear disposable Tyvek-type sleeves taped to your gloves.

RECOMMENDED RESPIRATOR: Where the neat test chemical is weighed and diluted, 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. (NTP, 1992)
DuPont Tychem® Suit Fabrics
No information available.
First Aid
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.

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.

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; if not available, use a level of protection greater than or equal to that advised under Protective Clothing.

INGESTION: Some heavy metals are VERY TOXIC POISONS, especially if their salts are very soluble in water (e.g., lead, chromium, mercury, bismuth, osmium, and arsenic). IMMEDIATELY call a hospital or poison control center and locate activated charcoal, egg whites, or milk in case the medical advisor recommends administering one of them. Also locate Ipecac syrup or a glass of salt water in case the medical advisor recommends inducing vomiting. Usually, this is NOT RECOMMENDED outside of a physician's care. If advice from a physician is not readily available and the victim is conscious and not convulsing, give the victim a glass of activated charcoal slurry in water or, if this is not available, a glass of milk, or beaten egg whites and IMMEDIATELY transport victim to a hospital. If the victim is convulsing or unconscious, do not give anything by mouth, assure that the victim's airway is open and lay the victim on his/her side with the head lower than the body. DO NOT INDUCE VOMITING. IMMEDIATELY transport the victim to a hospital.

OTHER: Since this chemical is a known or suspected carcinogen you should contact a physician for advice regarding the possible long term health effects and potential recommendation for medical monitoring. Recommendations from the physician will depend upon the specific compound, its chemical, physical and toxicity properties, the exposure level, length of exposure, and the route of exposure. (NTP, 1992)

Physical Properties

The Physical Property fields include properties such as vapor pressure and boiling point, as well as explosive limits and toxic exposure thresholds The information in CAMEO Chemicals comes from a variety of data sources.
Chemical Formula:
  • Na2(AsHO4).7H2O
Flash Point: data unavailable
Lower Explosive Limit (LEL): data unavailable
Upper Explosive Limit (UEL): data unavailable
Autoignition Temperature: data unavailable
Melting Point: 135 ° F (NTP, 1992)
Vapor Pressure: data unavailable
Vapor Density (Relative to Air): data unavailable
Specific Gravity: 1.88 (NTP, 1992)
Boiling Point: 356 ° F at 760 mm Hg (decomposes) (NTP, 1992)
Molecular Weight: 312.02 (NTP, 1992)
Water Solubility: greater than or equal to 100 mg/mL at 77° F (NTP, 1992)
Ionization Potential: data unavailable
IDLH: 5 mg/m3 for Arsenic (inorganic compounds, as As); A potential occupational carcinogen. (NIOSH, 2016)

AEGLs (Acute Exposure Guideline Levels)

No AEGL information available.

ERPGs (Emergency Response Planning Guidelines)

No ERPG information available.

PACs (Protective Action Criteria)

No PAC information available.

Regulatory Information

The Regulatory Information fields include information from the U.S. Environmental Protection Agency's Title III Consolidated List of Lists, the U.S. Department of Homeland Security's Chemical Facility Anti-Terrorism Standards, and the U.S. Occupational Safety and Health Administration's Process Safety Management of Highly Hazardous Chemicals Standard List (see more about these data sources).

EPA Consolidated List of Lists

Regulatory Name CAS Number/
313 Category Code
CAA 112(r)
Arsenic Compounds N020 & 313

(EPA List of Lists, 2015)

DHS Chemical Facility Anti-Terrorism Standards (CFATS)

No regulatory information available.

OSHA Process Safety Management (PSM) Standard List

No regulatory information available.

Alternate Chemical Names

This section provides a listing of alternate names for this chemical, including trade names and synonyms.