Page 222 - IGC BOOK

LTEL (8-Hour TWA STEL (15-Minute Reference
Substance Formula CAS Number
Reference Period) Period)

3
3
ppm mg/m ppm mg/m

Hydrogen
Sulphide H2S 7783-06-04 5 7 10 14

Safety Data Sheet (SDS)

Hazard communication legislation requires suppliers of hazardous substances to provide
safety data sheets. The basic design and section headings for this document generally follow
a globally used standard (based on an ANSI/ISO standard). The detailed content can vary
significantly over the world; this is not surprising since the classification systems also vary
throughout the world. Safety Data Sheets are intended to provide users with sufficient
information about the hazards of the chemicals for them to take appropriate steps to ensure
health and safety in the workplace in relation to all aspects of their use, including their
transport and disposal.

Safety data sheets must contain the following information in 16 sections:

1. Identification of the substance or preparation and supplier – its commercial name,
identical to that on the label. The supplier – name, address and emergency contact
phone numbers.
2. Composition and information on ingredients – chemical names.

3. Hazard identification – a summary of the most important features, including likely
adverse human health effects and symptoms.
4. First aid measures – separated for the various risks, and specific, practical and easily
understood.
5. Fire-fighting measures – emphasizing any special requirements.
6. Accidental release measures – covering safety, environmental protection and clean- up.
7. Handling and storage – recommendations for best practice, including any special
storage conditions or incompatible materials.
8. Exposure controls and personal protection – any specific recommendations, such as
particular ventilation systems and PPE.

ENSIGN| Unit IG2 – Element 7 – Chemical and Biological 17
Agents