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=**Methimazole**=
 * Properties:**
 * **Density:**
 * 1.284 g/cm3 Pred. []**
 * 1.36 g/cm3 []**
 * 1.35 g/cm3 [|**https://scifinder.cas.org/scifinder/view/scifinder/scifinderExplore.jsf**]**
 * 1.36 g/cm3 http://www.chemicalbook.com/ProductMSDSDetailCB9220870_EN.htm**
 * 1.28 g/cm3 http://www.lookchem.com/cas-60/60-56-0.html**


 * **Flash Point:**
 * 47.417 °C Pred.** **[]**
 * 47.4±22.6 °C Pred. []**
 * 47.4 °C** **[]**
 * 47°C []**
 * 47°C []**


 * **Melting Point:**
 * 145.5 °C []**
 * 146 °C []**
 * 144-147 °C []**
 * 146-148°C** [[file:methimazole Merck.bmp]]
 * 146 °C [[file:methimazole CRC Handbook of Chemistry and Physics.bmp]]**


 * **Boiling Point:**
 * 155 °C []**
 * 154.792 °C Pred. []**
 * 154.8±23.0 °C Pred. []**
 * 155°C http://www.chemicalbook.com/ProductMSDSDetailCB9220870_EN.htm**
 * 154.8 °C http://www.lookchem.com/cas-60/60-56-0.html**


 * ** Water solubility : **
 * 2.75 mg/mL (20 °C) []**
 * 200 g/L [[file:solubility of METHIMAZOLE.bmp]]**
 * 1 g/5 ml water[[file:Methimazole MSDS.bmp]]**
 * 275 g/L** **[]**
 * 20% [[file:solubility.bmp]]**

**List and describe three analytical techniques to characterize the organic compounds.**
**1. Mass Spectroscopy:** Mass spectrum shows as a vertical line graph, and each line represents an ion (or a fragment) which has a specific mass to charge ratio (m/z) and the height of each peak means the abundance of the ion. Generally the highest peak called base peak, and the peak has largest m/z ratio usually gives the total molecular weight of a compound. Difference between m/z ratios of two peaks refers to molecular weight of the fragment of this compound. **2. Infrared:** IR spectra indicate the presence of a band at a characteristic location (frequently is used to determine functional groups), usually for an IR adsorption or give a band there must be a changing in dipole moment. The intensity (weak, medium or strong), shape (broad or sharp) and position ((cm-1) are very important source for identify the functional groups in the spectra. **3. Nuclear magnetic resonance:**  NMR Spectroscopy generally has proton NMR spectrum and carbon-13 NMR spectrum. Proton NMR shows different types of signals, what type of proton, number of proton in each type and connectivity of each group due to coupling neighboring groups that a compound contains. For Carbon-13 NMR, we can see the number of peaks which indicates the number of types of carbon and chemical  shift of each signal represents types of carbon of a compound  but usually we can't see the carbon-carbon coupling in carbon 13 spectra. http://riodb01.ibase.aist.go.jp/sdbs/cgi-bin/direct_frame_top.cgi
 * Example: Acetic Acid (CH3COOH):**

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