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!
Even for small envelopes and light packages, USPS Priority Mail 2-Day is a better service than First-Class Mail. The price point is slightly higher, but delivery is much quicker. First-Class shipments may arrive in a day, or three days, or seven days. In contrast, Priority Mail is delivered within three days in most cases. Additionally, Priority Mail becomes the cheapest option for sending envelopes or packages that are heavy. Flat rate shipping means no increase in price with a heavier weight.