Definition
Standardized documents prepared by manufacturers that describe the physical and chemical properties, hazards, safe handling procedures, protective equipment requirements, first-aid measures, and emergency response information for a specific chemical product used in the workplace. In aviation maintenance, MSDS must be readily accessible for every hazardous material in the shop, including solvents, paints, lubricants, sealants, cleaners, and fuels.
Plain English
An information sheet from the maker of a chemical product that tells you what's in it, how it can hurt you, how to use it safely, what protective gear to wear, and what to do if something goes wrong.
Context Anchor
Seen in maintenance shops, hangars, and aircraft servicing areas where cleaners, paints, sealants, fuels, oils, or other chemicals are used.
Derivation
Material' refers to the chemical substance; 'Safety Data' means information needed to handle it safely. The term has since been replaced internationally by 'Safety Data Sheet' (SDS) under the Globally Harmonized System, but older shops and FAA handbooks still use MSDS.
Why Pilots Care
Mechanics rely on these sheets to avoid chemical burns, inhalation injuries, or fires that could compromise both personal safety and aircraft airworthiness.
Intuition Check
Do not treat an MSDS as just office paperwork. It is the safety information for a specific chemical, not a maintenance instruction or approval to use that chemical on an aircraft.
Example Sentence 1
Before opening the new drum of paint stripper, the technician pulled the MSDS to confirm which gloves and respirator were required.
Example Sentence 2
In case of a spill, the crew immediately located the MSDS to determine the correct cleanup steps.