Sati International, a company in group with ChemScience, will be producing select analyzed quantitative unknowns. Please see below for a list of materials. Each material will be sold as 2.5 kg: 5 lots of 500 g each. Supplies will be made to order and stock will NOT be maintained. All orders must be confirmed by October 13th, 2023; this service may not be available again until Fall 2025. These materials are shelf stable and so I encourage you to take this opportunity to stock up for the next 2 years or more. Orders will be fulfilled mid-December. Prices will be relative to the demand, given more interest we will be able to reduce the cost for an individual’s purchase.