The 2-Amino-4-methylthiazole with CAS registry number of 1603-91-4 is also known as Aminomethiazole bitartrate. The IUPAC name is 4-Methyl-1,3-thiazol-2-amine. It belongs to product categories of Fine Chemical & Intermediates; Amines; Blocks; Thiazoles; Thiazoles, Isothiazoles &Benzothiazoles; Building Blocks; Heterocyclic Building Blocks. Its EINECS registry number is 216-505-6. In addition, the formula is C₄H₆N₂S and the molecular weight is 114.17. This chemical is a white to light yellow crystal powder and should be stored in sealed containers in cold place.

Physical properties about 2-Amino-4-methylthiazole are: (1)ACD/LogP: 1.77; (2)ACD/LogD (pH 5.5): 1.532; (3)ACD/LogD (pH 7.4): 1.765; (4)ACD/BCF (pH 5.5): 7.534; (5)ACD/BCF (pH 7.4): 12.901; (6)ACD/KOC (pH 5.5): 126.445; (7)ACD/KOC (pH 7.4): 216.51; (8)#H bond acceptors: 2; (9)#H bond donors: 2; (10)Index of Refraction: 1.618; (11)Molar Refractivity: 31.79 cm³; (12)Molar Volume: 90.692 cm³; (13)Surface Tension: 55.969 dyne/cm; (14)Density: 1.259 g/cm³; (15)Flash Point: 94.416 °C; (16)Enthalpy of Vaporization: 46.919 kJ/mol; (17)Boiling Point: 232.505 °C at 760 mmHg; (18)Vapour Pressure: 0.059 mmHg at 25 °C.

Preparation of 2-Amino-4-methylthiazole: it is prepared by reaction of chloroacetone with thiourea. Firstly, the reactants are mixed with water under stirring and refluxed for 2 hours. Then granular sodium hydroxide is added to the mixture by stirring when the solution is cooled. Secondly, water layer is extracted with ether, combined with the dark red oily substance, dryed with sodium hydroxide and filtered. At last, filtrate is distillated to steam ether and product is obtained by collecting fraction at 117-120 °C (1.07 KPa) or 130-133 °C (2.40 KPa) by vacuum distillation. The yield is 70-75%.

Uses of 2-Amino-4-methylthiazole: it is used as pharmaceutical intermediate and used for organic synthesis. It is used to produce N,N-diethyl-N'-(4-methyl-thiazol-2-yl)-malonamide by reaction with diethylaminomalonat. The reaction occurs with solvent ethanol and other condition of heating. The yield is about 51%.

When you are using this chemical, please be cautious about it. As a chemical, it is irritating to eyes, respiratory system and skin. Besides, it is harmful by inhalation, in contact with skin and if swallowed. During using it, wear suitable protective clothing and eye/face protection. If contact with eyes accidently, rinse immediately with plenty of water and seek medical advice.

You can still convert the following datas into molecular structure:
1. Canonical SMILES: CC1=CSC(=N1)N
2. InChI: InChI=1S/C4H6N2S/c1-3-2-7-4(5)6-3/h2H,1H3,(H2,5,6)
3. InChIKey: OUQMXTJYCAJLGO-UHFFFAOYSA-N