Builders' sand, often referred to as construction sand, is typically made from naturally occurring materials such as quartz or silica and is primarily used in construction and masonry. Generally, it does not contain significant additives or chemicals; however, it may have trace amounts of other minerals or impurities depending on its source.
In specific contexts, certain types of sand, such as manufactured sand, might undergo processing that could involve chemicals for washing or other treatments. It's essential to check the specific product data sheet or consult with suppliers for any particular sand product if you’re concerned about chemical content, especially for specialized applications like sandblasting or filtration.
For most general construction uses, though, builders' sand is relatively free from harmful chemicals.