Purities : Chemicals listed in the environmental standards catalog are of 98% - 99% purity. Chemicals listed in the pharmaceutical pre-cursors catalog are of 95% purity. Pricing : All prices are in US dollars, sizes and prices are subject to change without prior notice. Net payment is required within 30 days from invoice date. Written price quotations when requested are valid for 30 days. All prices are F.O.B. (they do not include costs of delivery) Methods of shipment : Orders shipped via UPS, Federal Express, or US Mail where applicable, other methods of transportation will be used accordance DOT regulations. We will do our utmost to comply with your delivery requirements. Returns : Should be necessary to return one of our products, please write or call for instructions. Returns will not be accepted without prior authorization. Limitation of Use : The chemicals offered in this catalog are intended for laboratory research use only. This means that they may NOT be used as drugs, cosmetics, food additives, household chemicals, or agricultural products. They may not be on the Toxic Substance Control Ac t (TSCA) inventory. All of our chemicals should be handled by qualified individuals familiar with their hazards and trained in laboratory procedures. The absence of hazard warning must not be interpreted as an indication of safety. NeoSyn's liability will be limited to replacement products or refund of purchase price. Failure to give notice of claim within thirty days from date of delivery will constiture a waiver by buyer of any and all claims.