Section 3.1: Substances

Section 3.1 of the Safety Data Sheet (SDS) is crucial for identifying and understanding the chemical composition of substances. This section provides essential information for risk assessment, safe handling, and regulatory compliance.

1. Introduction to Section 3.1

Section 3.1 of the SDS specifically deals with substances, as opposed to mixtures (which are covered in Section 3.2). This section provides detailed information about:

  • Chemical identity of the substance
  • Concentration or concentration ranges
  • Classification information
  • Impurities and stabilizing additives

2. Chemical Identity

Identifier Type Description
Chemical name Standard chemical nomenclature
CAS number Chemical Abstracts Service registry number
EC number European Community number
IUPAC name International Union of Pure and Applied Chemistry name
Molecular formula Chemical formula showing atomic composition

Example Entry:

Field Value
Chemical Name Ethanol
CAS No. 64-17-5
EC No. 200-578-6
Molecular Formula C2H5OH

3. Concentration Information

Type Description Example
Exact percentage The precise concentration of the substance 99.9%
Range of percentages A range when exact percentage varies 98.5% - 99.9%
Generic ranges When exact details are trade secrets >90%

4. Classification Information

Element Requirement
GHS Classification Required for all substances
Hazard Class Must specify applicable classes
Category Specific category within class
Hazard Statements Standard H-statements required

Impurities and Stabilizers

Regulatory Compliance

Best Practices

Area Recommended Practice
Documentation Maintain complete records of all identifiers and classifications
Updates Review and update information at least annually
Validation Verify all information against reliable sources
Communication Ensure clear communication of changes to affected parties

Common Mistakes to Avoid

Issue Prevention
Incomplete identifiers Use checklist for all required fields
Outdated classifications Schedule regular reviews
Missing impurities Document all known impurities
Incorrect ranges Verify concentration data

Note: This guide is for informational purposes only. Always consult current regulatory requirements and professional guidance for specific situations.