Overview

On June 26, 2025, South Korea's Ministry of Employment and Labor (MOEL) issued the 2025 Q2 Hazard and Risk Notification for new chemical substances. This announcement includes the GHS classification for 51 newly manufactured and imported chemicals, with 25 identified as hazardous due to properties such as acute toxicity, skin corrosion, and serious eye damage. Notable examples include Methyldichlorosilane and N,N-Dimethylphosphoramidic dichloride.

Key Hazardous Substances and Their Risks

Methyldichlorosilane (CAS No. 75-54-7)

• Hazard Classification:

• Flammable liquid - Category 2

• Substances and mixtures which,in contact with water, emit flammable gases - Category 1

• Acute toxicity (oral) - Category 3

• Acute toxicity (inhalation) - Category 3

• Skin corrosion - Category 1

• Serious eye damage - Category 1

• Safety Measures:

• Use appropriate personal protective equipment (PPE), including respirators, gloves, and goggles.

• Ensure proper ventilation, such as local exhaust systems, to minimize vapor exposure.

N,N-Dimethylphosphoramidic Dichloride (CAS No. 677-43-0)

• Hazard Classification:

• Skin corrosion - Category 1

• Serious eye damage - Category 1

• Safety Measures:

• Wear PPE, including respirators, gloves, and goggles, to prevent direct contact with mist and vapor.

Detailed Hazard and Safety Information

Reporting Obligations for Manufacturers and Importers

South Korean regulations require manufacturers and importers of new chemical substances to submit a hazard investigation report via the Labor Portal Website. The deadlines are as follows:

• For volumes >1 ton: At least 30 days before production or import.

• For volumes ≤1 ton: At least 14 days before production or import.

If the substance is already registered with the Ministry of Environment, duplicate reporting may not be necessary.

GHS Classification and Labeling Requirements

Hazardous substances must include clear warning labels on their packaging. These labels should specify the GHS classification (e.g., acute toxicity Category 3, skin corrosion Category 1) and outline preventive measures. Employers are also required to:

• Provide workers with PPE, such as respirators, gloves, and goggles.

• Install local exhaust systems in high-risk areas to minimize exposure.

Safety Data Sheets (SDS) and Workplace Compliance

Manufacturers and importers must prepare Material Safety Data Sheets (MSDS) that detail:

• Chemical composition

• Hazard classifications

• Emergency response procedures

These MSDS must be readily accessible to workers to ensure workplace safety.

Reminder from REACH24H Consulting Group

South Korean authorities emphasize the importance of GHS hazard information training for effective implementation of safety measures. REACH24H Consulting Group advises companies to update their MSDS promptly to ensure compliance with South Korean regulations.

If you have any questions in this regard, please feel free to contact us at customer@reach24h.com.