This means it is only slightly harmful when dissolved in water. However, reactions with alkali metals, aluminum, mercury, fluorine or terpentine may increase the risk. Environmental risks may differ between iodine substances. The LD 50 value for rats (oral uptake) is about 14,000 mg/kg.
If you need to get it there fast, your best option is to use USPS's Priority Mail Express service! This is the fastest service offered by the USPS, with a guaranteed shipping time of 1 to 2 days, depending on the destination-or your money back!
Priority Mail, used for packages, is delivered within one to three business days, depending upon starting point and destination. The Priority Mail Express service guarantees overnight delivery of letters and packages to most U.S. addresses. Standard Post, intended for non-urgent packages, typically takes two to eight business days. Educational materials sent through Media Mail are also delivered within this time frame.