This Silica 200-500 500g is an ideal product for laboratory use. It is a fine, white powder with an average particle size of 200-500 microns, and is perfect for a wide range of applications. It is an amorphous form of silicon dioxide, highly purified and with a low iron content. The product is available in 500g packages and is a reliable and cost-effective choice for laboratories. It is safe and easy to handle, making it a great choice for any lab.