Dear,We are looking for Zinc Sulfide doped with silver and aluminium. (ZnS:Ag,Al) CAS # 68611-69-8We will require a Free of change sample of 100g as soon as possible.You can ship a sample of the product to us using our UPS account by air.If the product meets our requirements we will want to order 100-200Kg immediately.We require the price to be under 50 USD per Kilo.We require the product to have a 50% particle size distribution of ~ 7 microns and at 95% particle size distribution of less than 19 microns.Please can you let me know if you have a product meets these requirements and how quickly you could dispatch 100-200Kg of product.Kind regards,Ben. Dr Benjamin DaddsPrincipal Research Chemist.---------------------------------------------------------------------------------------------------------------------------------------------LUMINESCENCE, The Fairway, Bush Fair, Harlow, Essex, CM18 6NG, UK E-mail: ben.dadds@luminescence.co.uk Tel: + 44 1279 453711 - Fax: + 44 1279 421142