UCSF Lab Standard Operating Procedure
Chemical Process, Name or Hazard Class:
Arsenous Trichloride
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Type of SOP:
☐ Process
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☒Hazardous Chemical
☐ Hazardous Class
Purpose
Arsenous Trichloride is a very toxic chemical that can be fatal if ingested or inhaled. If exposed, immediately
contact a poison center or physician. It may cause skin and eye irritation. It can cause skin burns and eye
damage. Prolonged exposure may cause cancer. Arsenous Trichloride is extremely volatile under
inappropriate conditions.
Physical & Chemical Properties/Definition of Chemical Group
CAS#: 7784-34-1
Class: Very toxic, carcinogen
Molecular Formula: AsCl3
Form (physical state): Liquid
Color: Colorless
Boiling point: 130.2 °C
Potential Hazards/Toxicity
Arsenous Trichloride
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Date: Click here to enter a date.
Modified from SOP templates developed by UCLA EH&S (http://www.sop.ehs.ucla.edu/)
Fatal if ingested. Immediately contact a poison center or physician. Toxic if inhaled. May cause skin and eye
irritation. Causes severe skin burns and eye damage. May be fatal if absorbed through skin. May cause cancer.
Inorganic arsenic-containing compounds have a permissible exposure limit (PEL) of 10 µg/m3.
Engineering Controls
Chemical fume hood. Adequate exhaust ventilation.
Personal Protective Equipment (PPE)
Respirator Protection
If lab personnel would like to use respirator on a voluntary basis, they must be trained and fit-tested by
EH&S. This is a regulatory requirement. (http://or.ucsf.edu/ehs/8193-DSY/version/default/part/4/data/)
Hand Protection
Handle with appropriate gloves. Nitrile gloves are recommended. Wash hands after use.
NOTE: Consult with your preferred glove manufacturer to ensure that the gloves you plan on using are
compatible with arsenic trichloride.
Refer to glove selection chart from the links below:
http://www.ansellpro.com/download/Ansell_8thEditionChemicalResistanceGuide.pdf
OR
http://www.allsafetyproducts.biz/page/74172
OR
http://www.showabestglove.com/site/default.aspx
OR
http://www.mapaglove.com/
Eye Protection
ANSI approved, tight-fitting safety glasses/goggles. Face shield also recommended.
Skin and Body Protection
Flame resistant lab coat, long pants, and closed-toe shoes.
Hygiene Measures
Avoid contact with skin, eyes and clothing. Wash hands before breaks and immediately after handling the
product.
First Aid Procedures
If inhaled
Remove immediately to fresh air. If not breathing, give artificial respiration. If breathing is difficult, provide
oxygen. Seek medical aid.
In case of skin contact
Flush skin with plenty of water for at least 15 minutes while removing contaminated clothing. Seek medical
aid.
In case of eye contact
Flush eyes with plenty of water for at least 15 minutes. Seek medical aid.
If swallowed
Arsenous Trichloride
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Date: Click here to enter a date.
Modified from SOP templates developed by UCLA EH&S (http://www.sop.ehs.ucla.edu/)
Do not induce vomiting. Never give anything by mouth to an unconscious person. Rinse mouth with water.
Seek medical aid.
Special Handling and Storage Requirements
Precautions for safe handling: Avoid contact with skin and eyes. Avoid inhalation of vapor or mist. Handle
under dry protective gas.
Conditions for safe storage: Keep container tightly closed in a dry and well-ventilated place. Opened
containers must be carefully resealed and kept upright to prevent leakage. Store under dry inert gas. Light
sensitive. Moisture sensitive.
Spill and Accident Procedure
Chemical Spill Dial 9-911 from campus phone or 415-476-1414 from cell phone or 415-2068522 (SFGH only)
Spill – Assess the extent of danger. Assist contaminated or injured persons. Evacuate the spill area.
Avoid breathing vapors. If possible, confine the spill to a small area using a spill kit or absorbent
material. Keep others from entering contaminated area (e.g., use caution tape, barriers, etc.).
Small (<1 L) – If you have training, you may assist in the clean-up effort. Use appropriate personal
protective equipment and clean-up material for chemical spilled. Double bag spill waste in clear
plastic bags, label and take to the next chemical waste pick-up.
Large (>1 L) – Dial 9-911 from campus phone or 415-476-1414 from cell phone or 415-2068522 (SFGH only) for assistance.
Chemical Spill on Body or Clothes – Remove clothing and rinse body thoroughly in emergency
shower for at least 15 minutes. If discomfort persists, proceed to the Emergency Department. If no
further discomfort is experienced, have the SDS ready and contact Poison Control Hotline at 1-800222-1222 for further exposure information. Notify your direct supervisor and EH&S at 415-4761300 during work hours, or 9-911 during non-working hours and weekends.
Chemical Splash Into Eyes – Immediately rinse eyeball and inner surface of eyelid with water for
15 minutes by forcibly holding the eye open. If discomfort persists, proceed to the Emergency
Department. If no further discomfort is experienced, have the SDS ready and contact Poison
Control Hotline at 1-800-222-1222 for further exposure information. Notify your direct
supervisor and EH&S at 415-476-1300 during work hours, or 9-911 during non-working
hours and weekends.
Medical Emergency Dial 9-911 (campus phone) or 476-6911 (cell phone)
Note: All serious injuries must be reported to EH&S at 415-476-1300 within 8 hours.
Arsenous Trichloride
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Date: Click here to enter a date.
Modified from SOP templates developed by UCLA EH&S (http://www.sop.ehs.ucla.edu/)
Non-Life Threatening Emergency– Go to Occupational Health Programs (OHP) Clinic, 415-8857580, 2330 Post Street, Suite 460 Hours of Operation for Appointments: Monday - Friday
7:30 a.m. - 4:00 p.m. (except Holidays).
Note: All serious injuries must be reported to EH&S at 415-476-1300 within 8 hours.
Needle stick/puncture exposure (as applicable to chemical handling procedure) – Wash the
affected area with antiseptic soap and warm water for 15 minutes. For mucous membrane
exposure, flush the affected area for 15 minutes using an eyewash station. Page the needle stick
nurse by dialing 415-353-7842 (STIC).
Decontamination/Waste Disposal Procedure
Clean contaminated surfaces with soap and water and paper towels. Dispose of the paper towels as
hazardous waste.
Safety Data Sheet (SDS) Location
Online SDS can be accessed at http://or.ucsf.edu/ehs/7241-DSY/msds.html
Protocol/Procedure
Quantities covered by this SOP:
______ (g , ml) to _______ (g, ml)
Temperature range covered by this SOP:
__ °C – __ °C
General Overview and Purpose:
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Procedure:
Enter experimental procedure. You can copy procedure from your lab notebook or from literature.
NOTE
Any deviation from this SOP requires approval from the Principal Investigator.
Arsenous Trichloride
4
Date: Click here to enter a date.
Modified from SOP templates developed by UCLA EH&S (http://www.sop.ehs.ucla.edu/)