The Hazardous Substances Data Bank is a big book of information about really yucky and dangerous stuff that people might find in their homes or workplaces. It's like a super cool detective helper - it gives important clues to people who need to figure out how to be safe around these bad chemicals.
Some of the things that might be in the book are things like chemicals that are used to clean your house or your car, or even things like gasoline or batteries. These things might seem harmless, but if we're not careful around them, they can make us really sick.
The book has all sorts of information about these chemicals, like what they look like, how they smell, and what happens if we eat them, touch them, or breathe them in. It also has information about how to protect ourselves from them, like wearing gloves or a mask when we use them.
Scientists and doctors use the Hazardous Substances Data Bank to help them understand these chemicals better and figure out how to help people who might have been exposed to them. It's a really important book that helps keep everyone safe!