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Linear Formula:


MDL Number:


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(2N) 99% Magnesium Selenide
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(3N) 99.9% Magnesium Selenide
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(4N) 99.99% Magnesium Selenide
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(5N) 99.999% Magnesium Selenide
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Magnesium Selenide Properties (Theoretical)

Compound Formula MgSe
Molecular Weight 103.265
Appearance Powder or solid in various forms (ingot, sputtering target)
Melting Point N/A
Boiling Point N/A
Density 4.23 g/cm3
Solubility in H2O N/A
Exact Mass 103.901564
Monoisotopic Mass 103.901566 Da

Magnesium Selenide Health & Safety Information

Signal Word Danger
Hazard Statements H301-H331-H373-H400-H410
Hazard Codes T, N
Precautionary Statements P260-P261-P264-P270-P271-P273-P301+P310-P304+P340+P311+P330+P391-P403-P404-P405-P501
Risk Codes N/A
Safety Statements N/A
Transport Information UN 3283 6.1/PG III
GHS Pictograms

View and Print SDS


Date Accessed: 01/28/2022
Date Revised: 05/15/2015


Product Name: Magnesium Selenide

Product Number: All applicable American Elements product codes, e.g. MG-SE-02-P , MG-SE-03-P , MG-SE-05-P , MG-SE-04-P

CAS #: 1313-04-8

Relevant identified uses of the substance: Scientific research and development

Supplier details:
American Elements
10884 Weyburn Ave.
Los Angeles, CA 90024
Tel: +1 310-208-0551
Fax: +1 310-208-0351

Emergency telephone number:
Domestic, North America: +1 800-424-9300
International: +1 703-527-3887


Physical hazards Not classified.
Health hazards Acute toxicity, oral Category 3
Acute toxicity, inhalation Category 3
Specific target organ toxicity, repeated exposure Category 2
Hazardous to the aquatic environment, acute hazard Category 1
Environmental hazards
Hazardous to the aquatic environment, long-term hazard Category 1
OSHA defined hazards Not classified.
Label elements

Skull and Crossbones - GHS06 Health Hazard - GHS08 Environment - GHS09

Signal word: Danger
Hazard statement
H301 Toxic if swallowed.
H331 Toxic if inhaled.
H373 May cause damage to organs through prolonged or repeated exposure.
H400 Very toxic to aquatic life.
H410 Very toxic to aquatic life with long lasting effects.
Precautionary statement:
P260 Do not breathe dust/fume/gas/mist/vapors/spray.
P261 Avoid breathing dust.
P264 Wash thoroughly after handling.
P270 Do not eat, drink or smoke when using this product.
P271 Use only outdoors or in a well-ventilated area.
P273 Avoid release to the environment.
P301+P310 If swallowed: Immediately call a poison center/doctor.
P304+P340+P311+P330+P391 If inhaled: Remove person to fresh air and keep comfortable for breathing. Call a poison center/doctor. Rinse mouth. Collect spillage.
P403 Store in a well-ventilated place.
P404 Keep container tightly closed.
P405 Store locked up.
P501 Dispose of contents/container in accordance with local/regional/national/international regulations.


Magnesium Selenide (MgSe)
Cas number: 1313-04-8


Remove victim to fresh air and keep at rest in a position comfortable for breathing. Oxygen or
artificial respiration if needed. Do not use mouth-to-mouth method if victim inhaled the substance.
Induce artificial respiration with the aid of a pocket mask equipped with a one-way valve or other
proper respiratory medical device. Call a POISON CENTER or doctor/physician.
Skin contact
Wash off with soap and water. Get medical attention if irritation develops and persists.
Eye contact
Do not rub eyes. Rinse with water. Get medical attention if irritation develops and persists.
Call a physician or poison control center immediately. Rinse mouth. Do not induce vomiting without advice from poison control center. If vomiting occurs, keep head low so that stomach content doesn't get into the lungs. Do not use mouth-to-mouth method if victim ingested the substance. Induce artificial respiration with the aid of a pocket mask equipped with a one-way valve or other proper respiratory medical device.
Most important symptoms/effects, acute and delayed
Prolonged exposure may cause chronic effects.
Indication of immediate medical attention and special treatment needed
Provide general supportive measures and treat symptomatically. Keep victim warm. Keep victim
under observation. Symptoms may be delayed.
General information
If you feel unwell, seek medical advice (show the label where possible). Ensure that medical
personnel are aware of the material(s) involved, and take precautions to protect themselves. Show
this safety data sheet to the doctor in attendance.


Suitable extinguishing media
Water fog. Foam. Dry chemical powder. Carbon dioxide (CO2).
Unsuitable extinguishing media
Do not use water jet as an extinguisher, as this will spread the fire.
Specific hazards arising from the chemical
During fire, gases hazardous to health may be formed.
Special protective equipment and precautions for firefighters
Self-contained breathing apparatus and full protective clothing must be worn in case of fire.
Fire fighting equipment/instructions
Move containers from fire area if you can do so without risk.
Specific methods
Use standard firefighting procedures and consider the hazards of other involved materials.
General fire hazards
No unusual fire or explosion hazards noted.


Personal precautions, protective equipment and emergency procedures
Keep unnecessary personnel away. Keep people away from and upwind of spill/leak. Wear
appropriate protective equipment and clothing during clean-up. Avoid inhalation of dust. Ensure
adequate ventilation. Local authorities should be advised if significant spillages cannot be
contained. For personal protection, see section 8 of the SDS.
Methods and materials for containment and cleaning up
Avoid dispersal of dust in the air (i.e., clearing dust surfaces with compressed air). Prevent product
from entering drains. Stop the flow of material, if this is without risk.
Large Spills: Wet down with water and dike for later disposal. Shovel the material into waste
container. Cover with plastic sheet to prevent spreading. Absorb in vermiculite, dry sand or earth
and place into containers. Following product recovery, flush area with water.
Small Spills: Sweep up or vacuum up spillage and collect in suitable container for disposal. Wipe
up with absorbent material (e.g. cloth, fleece). Clean surface thoroughly to remove residual
Environmental precautions
Avoid release to the environment. Inform appropriate managerial or supervisory personnel of all
environmental releases. Prevent further leakage or spillage if safe to do so. Avoid discharge into
drains, water courses or onto the ground.


Precautions for safe handling
Minimize dust generation and accumulation. Avoid breathing dust. Avoid prolonged exposure. Do
not taste or swallow. When using, do not eat, drink or smoke. Use only outdoors or in a
well-ventilated area. Wear appropriate personal protective equipment. Wash hands thoroughly
after handling. Avoid release to the environment. Observe good industrial hygiene practices.
Conditions for safe storage, including any incompatibilities
Store locked up. Store in original tightly closed container. Store in a well-ventilated place. Store
away from incompatible materials


Appropriate engineering controls
Good general ventilation (typically 10 air changes per hour) should be used. Ventilation rates
should be matched to conditions. If applicable, use process enclosures, local exhaust ventilation,
or other engineering controls to maintain airborne levels below recommended exposure limits. If
exposure limits have not been established, maintain airborne levels to an acceptable level.
Control parameters
Follow standard monitoring procedures.
Individual protection measures, such as personal protective equipment
Eye/face protection If contact is likely, safety glasses with side shields are recommended.
Skin protection/Hand protection
Wear appropriate chemical resistant gloves. Suitable gloves can be recommended by the glove
Wear suitable protective clothing. Use of an impervious apron is recommended.
Respiratory protection
In case of insufficient ventilation, wear suitable respiratory equipment.
Thermal hazards
Wear appropriate thermal protective clothing, when necessary.
General hygiene considerations
Keep away from food and drink. Always observe good personal hygiene measures, such as
washing after handling the material and before eating, drinking, and/or smoking.


Information on basic physical and chemical properties
General Information
Form: Solid
Color: Not determined.
Odor: Not determined.
Odor threshold: Not determined.
pH-value: Not applicable.
Change in condition
Melting point/Melting range: Not determined.
Boiling point/Boiling range: Not determined.
Sublimation temperature / start: Not determined
Flammability (solid, gaseous): Not determined.
Ignition temperature: Not determined
Decomposition temperature: Not determined
Auto igniting: Not determined.
Explosion limits:
Lower: Not determined
Upper: Not determined
Vapor pressure: < 0.0000001 kPa at 25 °C
Relative density: Not determined.
Vapor density: Not applicable.
Evaporation rate: Not applicable.
Solubility in / Miscibility with Water: Not determined
Partition coefficient (n-octanol/water): Not determined.
dynamic: Not applicable.
kinematic: Not applicable.
Other information
No further relevant information available.


The product is stable and non-reactive under normal conditions of use, storage and transport.
Chemical stability
Material is stable under normal conditions.
Possibility of hazardous reactions
Hazardous polymerization does not occur.
Conditions to avoid
Contact with incompatible materials.
Incompatible materials
Strong oxidizing agents.
Hazardous decomposition products
No hazardous decomposition products are known.


Information on toxicological effects
Acute toxicity
No data available
Dermal: No data available
No data available
Skin corrosion/irritation
No data available
Serious eye damage/eye irritation
No data available
Respiratory or skin sensitisation
No data available
Germ cell mutagenicity
No data available
3-Group 3: Not classifiable as to its carcinogenicity to humans
No component of this product present at levels greater than or equal to 0.1% is identified as a
known or anticipated carcinogen by NTP.
No component of this product present at levels greater than or equal to 0.1% is identified as a
carcinogen or potential carcinogen by OSHA.
Reproductive toxicity
No data available
No data available
Specific target organ toxicity -single exposure
No data available
Specific target organ toxicity -repeated exposure
May cause damage to organs through prolonged or repeated exposure.
Aspiration hazard
No data available
Additional Information
RTECS: Not available
Acute selenium poisoning produces central nervous system effects, which include nervousness, convulsions, and drowsiness. Other signs of intoxication can include skin eruptions, lassitude, gastrointestinal distress, teeth that are discolored or decayed, odorous ("garlic") breath, and partial loss of hair and nails. Chronic exposure by inhalation can produce symptoms that include pallor, coating of the tongue, anemia, irritation of the mucosa, lumbar pain, liver and spleen damage, as well as any of the other previously mentioned symptoms. Chronic contact with selenium
compounds may cause garlic odor of breath and sweat, dermatitis, and moderate emotional instability., To the best of our knowledge, the chemical, physical, and toxicological properties have not been thoroughly investigated.
Stomach-Irregularities-Based on Human Evidence
Stomach-Irregularities-Based on Human Evidence


No data available
Persistence and degradability
No data available
Bioaccumulative potential
No data available
Mobility in soil
No data available
Results of PBT and vPvB assessment
PBT/vPvB assessment not available as chemical safety assessment not required/not conducted
Other adverse effects
An environmental hazard cannot be excluded in the event of unprofessional handling or disposal.
Very toxic to aquatic life with long lasting effects.


Waste treatment methods
Offer surplus and non-recyclable solutions to a licensed disposal company.
Contact a licensed professional waste disposal service to dispose of this material.
Dissolve or mix the material with a combustible solvent and burn in a chemical incinerator equipped with an afterburner and scrubber.
Contaminated packaging
Dispose of as unused product.


UN number: 3283
Class: 6.1
Packing group: III
Proper shipping name: Selenium compound, solid, n.o.s.(Magnesium selenide)
Marine pollutant: yes
Poison Inhalation Hazard: No
UN number: 3283
Class: 6.1
Packing group: III
EMS-No: F-A, S-A
Proper shipping name: SELENIUM COMPOUND, SOLID, N.O.S.(Magnesium selenide)
Marine pollutant: yes
UN number: 3283
Class: 6.1
Packing group: III
Proper shipping name: Selenium compound, solid, n.o.s.(Magnesium selenide)


SARA 302 Components
No chemicals in this material are subject to the reporting requirements of SARA Title III, Section 302.
SARA 313 Components
The following components are subject to reporting levels established by SARA Title III, Section 313:
Magnesium selenide
SARA 311/312 Hazards
Acute Health Hazard, Chronic Health Hazard
Massachusetts Right To Know Components
No components are subject to the Massachusetts Right to Know Act.
Pennsylvania Right To Know Components
Magnesium selenide
New Jersey Right To Know Components
Magnesium selenide
California Prop. 65 Components
This product does not contain any chemicals known to State of California to cause cancer, birth defects, or any other reproductive harm.


Safety Data Sheet according to Regulation (EC) No. 1907/2006 (REACH). The above information is believed to be correct but does not purport to be all inclusive and shall be used only as a guide. The information in this document is based on the present state of our knowledge and is applicable to the product with regard to appropriate safety precautions. It does not represent any guarantee of the properties of the product. American Elements shall not be held liable for any damage resulting from handling or from contact with the above product. See reverse side of invoice or packing slip for additional terms and conditions of sale. COPYRIGHT 1997-2021 AMERICAN ELEMENTS. LICENSED GRANTED TO MAKE UNLIMITED PAPER COPIES FOR INTERNAL USE ONLY.

About Magnesium Selenide

Magnesium Selenide (MgSe) is generally immediately available in most volumes. High purity, submicron and nanopowder forms may be considered. American Elements produces to many standard grades when applicable, including Mil Spec (military grade); ACS, Reagent and Technical Grade; Food, Agricultural and Pharmaceutical Grade; Optical Grade, USP and EP/BP (European Pharmacopoeia/British Pharmacopoeia) and follows applicable ASTM testing standards. Typical and custom packaging is available. Additional technical, research and safety (MSDS) information is available as is a Reference Calculator for converting relevant units of measurement.

Magnesium Selenide Synonyms

Magnesium monoselenide, selenoxomagnesium

Chemical Identifiers

Linear Formula MgSe
MDL Number N/A
EC No. 215-201-0
Beilstein/Reaxys No. N/A
Pubchem CID 73969
IUPAC Name magnesium selenium(2-)
SMILES [Mg+2].[Se-2]
InchI Identifier InChI=1S/Mg.Se/q+2;-2

Packaging Specifications

Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and steel drums to 1 ton super sacks in full container (FCL) or truck load (T/L) quantities. Research and sample quantities and hygroscopic, oxidizing or other air sensitive materials may be packaged under argon or vacuum. Shipping documentation includes a Certificate of Analysis and Safety Data Sheet (SDS). Solutions are packaged in polypropylene, plastic or glass jars up to palletized 440 gallon liquid totes, and 36,000 lb. tanker trucks.

Related Elements


Magnesium Bohr ModelSee more Magnesium products. Magnesium (atomic symbol: Mg, atomic number: 12) is a Block S, Group 2, Period 3 element with an atomic mass of 24.3050. The number of electrons in each of Magnesium's shells is [2, 8, 2] and its electron configuration is [Ne] 3s2. The magnesium atom has a radius of 160 pm and a Van der Waals radius of 173 pm. Magnesium was discovered by Joseph Black in 1775 and first isolated by Sir Humphrey Davy in 1808. Magnesium is the eighth most abundant element in the earth's crust and the fourth most common element in the earth as a whole. Elemental MagnesiumIn its elemental form, magnesium has a shiny grey metallic appearance and is an extremely reactive. It is can be found in minerals such as brucite, carnallite, dolomite, magnesite, olivine and talc. Commercially, magnesium is primarily used in the creation of strong and lightweight aluminum-magnesium alloys, which have numerous advantages in industrial applications. The name "Magnesium" originates from a Greek district in Thessaly called Magnesia.


Selenium Bohr ModelSee more Selenium products. Selenium (atomic symbol: Se, atomic number: 34) is a Block P, Group 16, Period 4 element with an atomic radius of 78.96. The number of electrons in each of Selenium's shells is 2, 8, 18, 6 and its electron configuration is [Ar] 3d10 4s2 4p4. The selenium atom has a radius of 120 pm and a Van der Waals radius of 190 pm. Selenium is a non-metal with several allotropes: a black, vitreous form with an irregular crystal structure three red-colored forms with monoclinic crystal structures and a gray form with a hexagonal crystal structure, the most stable and dense form of the element. Elemental SeleniumOne of the most common uses for selenium is in glass production the red tint that it lends to glass neutralizes green or yellow tints from impurities in the glass materials. Selenium was discovered and first isolated by Jöns Jakob Berzelius and Johann Gottlieb Gahn in 1817. The origin of the name Selenium comes from the Greek word "Selênê," meaning moon.