Today, the physical properties as well as the chemical composition of product components should be tested by a materials testing lab such as NSL Analytical Services.  NSL Analytical Services continues to earn the trust of researchers, government agencies and businesses around the world.  Visit https://bit.ly/2W1lyjA  for a list of accreditations and certifications, or call (877) 560-3943 for information on testing services available for your needs.