Precautions of neodymium magnet
Release time:2017-03-08 11:55 Author:Nature
Keywords: neodymium magnet
The following should not be construed as a complete and exhaustive list of hazards presented by magnetic materials.
This document is provided for information only. Readers are responsible for checking the accuracy, completeness,
currency and/or suitability of all information themselves. National Imports LLC does not represent, guarantee or warranty
the accuracy, completeness, currency, or suitability of the information in this document. National Imports LLC specifically
disclaims any and all liability for any claims or damages that may result from providing this document or the information it contains.
RARE-EARTH MAGNETS SHOULD BE KEPT OUT OF REACH OF CHILDREN. DO NOT INGEST OR INHALE MAGNETS.
INGESTION OR INHALATION OF MAGNETS MAY RESULT IN INJURY OR DEATH. RARE-EARTH MAGNETS ARE NOT TOYS.
SECURE MAGNETS WHEN UNATTENDED. Children should not be allowed to handle or play with rare-earth magnets. Children and
adults should not ingest magnets or place magnets in any body orifice such the ear, nose or mouth. If magnets are ingested or
aspirated to the lungs, immediate medical attention is required.
Rare-earth magnets should not be used as toys, games, puzzles, jewelry, manipulative or construction desk toys, and sculptures.
Rare-earth magnets should not be used for mental stimulation or stress relief or any other novelty application that would trivialize
their inherent hazard.
Rare-Earth magnets are fragile and can break easily. Broken magnets are sharp and can cause cuts. These magnets will become
demagnetized when exposed to high heat. These magnets are powerful and can accelerate at high speeds toward each other and
toward ferrous material. When these magnets come together quickly, they can shatter and break sending particles at speed. These
magnets can also pinch strongly if allowed to come together against the skin. You should always wear gloves and eye protection
when handling large magnets. Very large magnets can pose a crushing hazard and should not be handled.
Pull force descriptions on this site are estimates based on ideal conditions and should not be used in application design.
Variations in iron content, thickness, temperature and surface finish and condition will all reduce these ratings. Magnets should
never be used to lift objects over people.
Rare-earth magnets have strong magnetic fields that can damage electronic equipment and magnetic data storage media. You
should keep these magnets away from electronic equipment, computer discs, credit cards, video tapes, and other magnetic media.
Rare-earth magnets should not be burned. These magnets can ignite and burn at high intensity. These magnets should not be
drilled or machined. Drilling and machining may produce metal powder which is flamable and may cause high heat to develop
resulting in ignition. The magnets may shatter and break when drilled or machined.
Rare-earth magnets are primarily composed of neodymium, dysprosium, samarium, iron, and boron. The chemical, physical and
toxicological properties of neodymium, samarium and dysprosium have not been thoroughly investigated and recorded. Rare-earth
magnets should not be used in contact with food or ingestible liquids. Rare-earth magnets should not be used in long term contact
with the skin. The current Material Safety Data Sheets (MSDS) should be consulted to obtain current procedures for handling or
working with these substances in a safe manner.
Neodymium-Iron-Boron rare-earth magnets are susceptible to oxidation. These magnets are plated to reduce their oxidation
susceptibility but will oxidize in many environments. Most rare earth elements (neodymium, dysprosium, samarium, etc.) absorb
hydrogen into their material structure resulting in expansion and cracking of the material which is referred to as decrepitation.
Therefore, rare-earth magnets are not recommended where exposure to hydrogen is likely. Magnets that have oxidized should be
disposed of. The Material Safety Data Sheets (MSDS) for the component materials should be consulted prior to the use, handling
or transportation of oxidized neodymium rare-earth magnets.
Transportation of magnetic materials by air in the United States is regulated by the U.S. Department of Transportation and is
covered under the Code of Federal Regulations (CFR) 49 parts 100-185. A magnetized material is considered a hazardous
material and is regulated as a hazard class 9 material when it is offered for transportation by air and when it has a magnetic field
strength capable of causing the deviation of aircraft instruments. Any magnetic material with a measurable field strength greater
than 0.00525 gauss at 15 feet is prohibited from air transportation. An article is not restricted as a magnetized material if the
field strength observed at a distance of 7 feet is less than 0.002 gauss or there is no significant compass deflection (less than 0.5 degree).