Chemical / Hazardous Material

Overview

The SDS is the single source of truth — read it before use, always.

Step-by-step procedure

Obtain and read the SDS before it comes to site.
Assess exposure and select correct PPE.
Provide adequate ventilation.
Store compatibly; separate incompatible classes.
Use bunding and keep a spill kit on hand.
Label all containers clearly (GHS).
Dispose of waste through licensed handlers.

Spill response (basic)

Protect yourself first; evacuate if needed.
Stop the source if safe; contain the spill.
Notify the supervisor; clean up per the SDS.

Roles & responsibilities

Role	Responsibility
Supervisor	Maintains the SDS register; approves chemicals.
Worker	Reads SDS; handles and stores correctly.
Safety officer	Checks storage, labelling and spill readiness.

Common mistakes to avoid

Decanting into unlabelled bottles.
Storing incompatible chemicals together.
Wrong glove/filter for the substance.

Legal requirements (Thailand)

Occupational Safety, Health and Environment Act B.E. 2554 (2011) — the governing workplace-safety law in Thailand.
Ministerial Regulation on OSH for hazardous chemicals B.E. 2556 (2013).
Hazardous Substance Act B.E. 2535 (1992).

Frequently asked questions

What is Chemical / Hazardous Material?

Hazardous substances can harm by inhalation, skin contact, ingestion or injection, and many are also flammable or harmful to the environment. The Safety Data Sheet (SDS) is the single source of truth for each product — it states the hazards, the right PPE, first aid, fire-fighting media, and spill and disposal methods. Reading it before use is non-negotiable.

Who is responsible?

Supervisor: Maintains the SDS register and approves chemicals on site.; Worker: Reads the SDS, wears PPE, handles and stores correctly.; Safety officer: Checks storage compatibility, labelling and spill readiness.

What are the most common mistakes to avoid?

Decanting chemicals into unlabelled bottles. Storing incompatible chemicals together (e.g., acids with oxidizers). Using the wrong glove material or respirator filter for the substance.

References — SDS; GHS; Thai Hazardous Substance Act and OSH Act B.E. 2554.