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Type of SOP: ☐ Process ☒ Hazardous Chemical ☐ Hazardous Class
Purpose
Magnesium phosphide is highly toxic. Magnesium phosphide is potentially flammable, it can react readily with water to produce phosphine gas which may ignite spontaneously in air. May be ignited by heat, sparks or flames.
Dangers of serious damage to health by prolonged exposure through inhalation. Extreme caution is advised.
Is harmful if swallowed, inhaled, or in contact with skin or eyes.
Is used as an insecticide and also known as Magtoxin or Trimagnesium diphosphide.
Physical & Chemical Properties/Definition of Chemical Group
CAS#: 12057-74-8
Class: Potential flammable, Acute toxin
Molecular Formula: Mg
3
P
2
Form (physical state): solid
Color: green to yellow
Magnesium Phosphide
1
Modified from SOP templates developed by UCLA EH&S ( http://www.sop.ehs.ucla.edu/ )
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Boiling point: N/A
Potential Hazards/Toxicity
Magnesium phosphide is highly toxic and may form flammable vapor during use. May ignite on contact with water or moist air. May be ignited by heat, sparks or flames. Decomposes with moisture to give phosphine, a highly toxic flammable gas.
Dangers of serious damage to health by prolonged exposure through inhalation of phosphine gas. Extreme caution is advised. Keep away from heat and sources of ignition. Material poses extreme risk of explosion by shock, fire, friction or other sources of ignition. Is harmful if swallowed, inhaled, or in contact with skin or eyes.
The following permissible exposure limit data is available: 0.3 mg/ m 3 as Phosphine
No acute toxicity data is available.
Engineering Controls
Handle using a chemical fume hood with good ventilation and electrically grounded lines and equipment.
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
Gloves must be worn. Use proper glove removal technique to avoid any skin contact. Nitrile gloves are recommended.
NOTE: Consult with your preferred glove manufacturer to ensure that the gloves you plan on using are compatible with Magnesium phosphide .
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 properly fitting safety glasses or chemical splash goggles. Face shield is also recommended.
Skin and Body Protection
Flame resistant/cotton lab coats must be worn and be appropriately sized for the individual and buttoned to their full length. Laboratory coat sleeves must be of sufficient length to prevent skin exposure while wearing gloves. Full length pants and close-toed shoes must be worn at all times by all individuals that are occupying the laboratory area. The area of skin between the shoe and ankle should not be exposed.
Magnesium Phosphide
2
Modified from SOP templates developed by UCLA EH&S ( http://www.sop.ehs.ucla.edu/ )
Date: Click here to enter a date.

Hygiene Measures
Wash thoroughly and immediately after handling. Remove any contaminated clothing and wash before reuse.
First Aid Procedures
If inhaled
Move into the fresh air immediately and give oxygen. If not breathing give artificial respiration. Seek medical attention immediately.
In case of skin contact
Immediately flush skin with plenty of water for at least 15 minutes while removing contaminated clothing and shoes. Wash any contaminated clothing before reuse. Thoroughly clean shoes before reuse. Seek medical attention immediately.
In case of eye contact
Check for and remove any contact lenses. Rinse thoroughly with plenty of water for at least 15 minutes and consult a physician. Seek immediate medical attention and continue eye rinse during transport to hospital.
If swallowed
Do NOT induce vomiting unless directed by medical personnel. Never give anything by mouth to an unconscious person. Seek medical attention immediately.
Special Handling and Storage Requirements
Precautions for safe handling: Potentially flammable, handle away from heat and sources of ignition. Avoid shock or friction. Avoid contact with skin and eyes and inhalation. Avoid inhalation of vapor or mist. Avoid formation of dust.
Conditions for safe storage: Potentially flammable, store away from heat and sources of ignition. Avoid shock or friction. Flammable materials should be stored in a flammable storage cabinet. Keep in a dry place. Keep container tightly closed in a cool, dry, and well ventilated. Keep away from incompatible materials and conditions. Keep cool and protect from sunlight.
Spill and Accident Procedure
Chemical Spill Dial 9-911 from campus phone or 415-476-1414 from cell phone or 415-206-
8522 (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 415-206-
8522 (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
Magnesium Phosphide
3
Modified from SOP templates developed by UCLA EH&S ( http://www.sop.ehs.ucla.edu/ )
Date: Click here to enter a date.

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.
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.
Non-Life Threatening Emergency– Go to Occupational Health Programs (OHP) Clinic, 415-885-
7580, 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:
Enter the experimental purpose
Procedure:
Magnesium Phosphide
4
Modified from SOP templates developed by UCLA EH&S ( http://www.sop.ehs.ucla.edu/ )
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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.
Magnesium Phosphide
5
Modified from SOP templates developed by UCLA EH&S ( http://www.sop.ehs.ucla.edu/ )
Date: Click here to enter a date.