Knowledge · HR & Labor

MSDS · Material Safety Data Sheet

Material Safety Data Sheet

📂HR & Labor⏱2-min read📊Practical🔗5 related

What is an MSDS?

In one line
A Material Safety Data Sheet contains a chemical's hazards, handling precautions, and first-aid measures. Its preparation, provision, posting, and training are all required by law.
⚡ Summary in 3 lines
  • Preparing and providing the sheet, posting it, labeling containers, and training workers are all required
  • If it isn’t on the floor, it doesn’t count as compliance
  • Missing labels on decanted containers are a common citation

When a safety data sheet is within reach, the basis for on-site decisions changes. When a thinner splashes into someone's eye, instead of a senior coworker's "just rinse it with water," the document states the rinse time for that specific substance and whether hospital transport is needed. A sheet's value comes not from being stored but from being reached. That is why the law doesn't stop at preparation and submission, but bundles in posting at the handling area, warning labels on containers, and worker training. Can a worker reach out and open it within a minute? That is the practical test of compliance.

The data sheet is standardized into 16 sections under the GHS framework, covering chemical product information, hazards, composition, first-aid measures, firefighting, exposure controls and personal protective equipment. Manufacturers and importers must prepare and submit the sheet and hand it over whenever they transfer or supply the product; for trade-secret ingredients, they can obtain approval to list a substitute name and a concentration range instead. The workplace obligations are different. Sheets must be posted and kept at hand for each work process that handles the substance; containers must carry a warning label showing the name, pictogram, signal word, hazard statements, precautionary statements and supplier information; and training must be repeated for each new hire, each job change, and each time hazard information changes. These duties are separate from those under the Chemicals Control Act, which governs permits for handling facilities, so complying with one does not exempt you from the other.

The most common misconception is "we have the sheets on file, so we're done." The second is decanted containers. If the 20-liter drum is labeled but the plastic bottle on the workbench has no marking, a substitute worker brought in for the night shift will take it for water or cleaning fluid. The third is keeping an outdated version the supplier sent years ago: the ingredients and wording have been revised, but the sheet on site is the old one. Inspectors check the floor, not the binder. Missing postings, labels, or training can result in administrative fines, but the far bigger loss is having no information to bring to the emergency room on the day of an accident.

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💡 In plain English
Think of a medicine’s instruction leaflet. If the bottle is in the cabinet but the leaflet is in the warehouse, it’s useless in an emergency.
Why it matters in practice
When an accident happens, the first thing you need to know is what the substance is. If the site can't answer that, the response is delayed by minutes.
Origin and sources

In line with international hazard communication systems (such as GHS), Korea's Occupational Safety and Health Act sets out requirements for the preparation, submission, and provision of safety data sheets, as well as workplace posting, warning labels, and training.

Source · Safety data sheet requirements under Korea's Occupational Safety and Health Act
An example

Consider Company A, an auto-parts plating firm with 140 employees (a hypothetical example). It handles more than 60 chemicals and has 22 foreign workers. After a worker splashed thinner in their eye, they didn't know how long to flush it, rinsed it under tap water for 3 minutes, and moved on. It took 11 minutes to find the sheet on the day of the accident.

  1. The plant manager, who is also the safety and health officer, pulled three years of purchase orders and compared the 63 substances actually in use against the 41 data sheets on file. "22 appear on purchase orders but have no sheet," the manager said, and passed the list to the purchasing team.
  2. A purchasing manager sent letters to 17 suppliers saying, "Our copy is three years old, so please send the revised version." Within four weeks all 63 sheets were in hand, and 9 of them were revised editions with changed ingredient listings.
  3. The Plating Team 1 foreman inspected every decanted container and found that 31 of 38 plastic bottles and small drums had no label. The foreman changed the work procedure so that label printers sit at three workbenches and a label is printed the moment a chemical is decanted.
  4. The safety manager printed just the first-aid section of each sheet on a single A4 page, made Vietnamese and Thai summaries, and ran a 30-minute hands-on training session for everyone, including the 22 foreign workers. Each person had to point out the eyewash station themselves.
  5. In a self-inspection eight weeks later, the posting rate was 100% for every process, missing labels on decanted containers were down to 0, and the share of workers who could answer "name the substance you use and its first-aid measures" rose from 41% to 94%.
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Last updated 13 Sep 2026 · Reviewed by John Kim

FAQ

It must be posted or kept at the handling area so workers can check it immediately. Keeping it only in the office is hard to count as compliance.
You need to check whether the container falls under the warning label requirement. In practice, missing labels on decanted containers are the most common citation.
A system and approval procedure exist that allow some information to be replaced with alternative wording. Omitting it arbitrarily is a violation, so check the procedure.
Distributing the sheets is not enough. You also need a way to confirm that workers understand the hazards, handling methods and first-aid steps. For foreign workers, the sheets must be provided in a language they understand for compliance to be real.