What is the best source of information about the chemicals in a product?

The Safety Data Sheets (SDS) are the best source of information about the chemicals in a product because they provide detailed information specifically related to chemical substances. An SDS includes comprehensive details such as the hazards of the chemicals, handling and storage recommendations, personal protective equipment (PPE) requirements, first-aid measures in case of exposure, and spill or leak procedures. This is crucial for ensuring the safety of both the cosmetologist and the client when using products that contain potentially hazardous chemicals.

While product labels do provide important information, they often contain limited details and may not cover all hazards or necessary safety precautions in-depth. Instruction manuals focus more on the application or use of a product rather than safety data about the chemicals themselves. Online reviews may offer insights into user experiences but do not provide reliable or detailed chemical information. Thus, for health and safety in cosmetology, the Safety Data Sheets are the most authoritative and comprehensive resource.