Nicotine is a nitrogen-containing chemical-an alkaloid, which is made by several types of plants, including the tobacco plant. Nicotine is also produced synthetically.Nicotiana tabacum, the type of nicotine found in tobacco plants, comes from the nightshade family.icotine is a nitrogen-containing chemical-an alkaloid, which is made by several types of plants, including the tobacco plant. Nicotine is also produced synthetically. Nicotiana tabacum, the type of nicotine found in tobacco plants, comes from the nightshade family.
8.25% The Mckinney, Texas sales tax is  8.25% , consisting of 6.25% Texas state sales tax and 2.00% Mckinney local sales taxes.The local sales tax consists of a 2.00% city sales tax.
When an out-of-state retailer does not collect sales tax, the responsibility of paying the tax falls on the purchaser. The use tax is calculated at the same rate as the sales tax, which for 2006, was 7% in all counties except Mecklenburg and Dare. In Mecklenburg County, the rate was 7.5%. The rate was 8% in Dare County from 1/1/06 through 6/30/06 and 7% from 7/1/06 through 12/31/06.