This application is the database of chemical toxicity in Thai language by Nopparat Rajathanee Hospital. It is very useful for those who want the information about certain chemicals quickly. When you load the application in your iPhone, you needn’t to wait for internet connection to see the chemical information. The information is arranged in the useful style that is very easy to use. If you use it and are not sastisfy, you can also give the suggestion to us for correction or put in more chemical information. It is very easy for you to give suggestion about the new chemical information that you want us to add. NRHChem is the application made by Nopparat Rajathanee Hospital. The Hospital take responsibility for the National Poison Center according to The National Chemical Safety act. It is the duty for Nopparat Rajathanee Hospital to help the National Poison Center work fluently. So the Hospital team decided to develop the chemical toxic database in Thai language that it is easy to use.