The IUPAC name of this chemical is 1-methylindazole-3-carboxylic acid. With the CAS registry number 50890-83-0, it is also named as 1H-Indazole-3-carboxylic acid, 1-methyl-. The product's categories are Acids and Derivatives; Heterocycles; Indoles and Derivatives; Pharmacetical; Carboxylic Acids; Benzene Derivates; Organic Acids; Carboxylic Acids; Fused Ring Systems; Building Blocks; Heterocyclic Building Blocks; Indazoles. It is white to light yellow needle crystal which should be sealed in the container and stored in the cool and dry place.

The other characteristics of this product can be summarized as: (1)ACD/LogP: 1.61; (2)# of Rule of 5 Violations: 0; (3)ACD/BCF (pH 5.5): 1; (4)ACD/BCF (pH 7.4): 1; (5)ACD/KOC (pH 5.5): 2.49; (6)ACD/KOC (pH 7.4): 1; (7)#H bond acceptors: 4; (8)#H bond donors: 1; (9)#Freely Rotating Bonds: 1; (10)Index of Refraction: 1.653; (11)Molar Refractivity: 47.44 cm³; (12)Molar Volume: 129.5 cm³; (13)Polarizability: 18.81×10^-24 cm³; (14)Surface Tension: 53.1 dyne/cm; (15)Enthalpy of Vaporization: 66.69 kJ/mol; (16)Vapour Pressure: 1.42E-06 mmHg at 25°C; (17)Rotatable Bond Count: 1; (18)Exact Mass: 176.058578; (19)MonoIsotopic Mass: 176.058578; (20)Topological Polar Surface Area: 55.1; (21)Heavy Atom Count: 13; (22)Complexity: 220.

Preparation of 1-Methylindazole-3-carboxylic acid: It can be obtained by 1-methyl-1H-indazole-3-carboxylic acid methyl ester. This reaction needs reagent 1N NaOH and solvent tetrahydrofuran at ambient temperature. The yield is 100%.

Uses of 1-Methylindazole-3-carboxylic acid: It can be used as the intermediate of drug Granisetron. It also can react with 1-benzyl-4-methyl-[1,4]diazepan-6-ylamine to get 1-methyl-1H-indazole-3-carboxylic acid (1-benzyl-4-methyl-[1,4]diazepan-6-yl)-amide. This reaction needs reagent 1-ethyl-3-<3-(dimethylamino)propyl>carbodiimide hydrochloride and solvent CH₂Cl₂ at ambient temperature. The reaction time is 5 hours. The yield is 46%.

When you are using this chemical, please be cautious about it as the following:
It is not only harmful if swallowed, but also irritating to eyes, respiratory system and skin. So people should not breathe vapour. In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. If you want to contact this product, you must wear suitable protective clothing, gloves and eye/face protection.

People can use the following data to convert to the molecule structure.
1. SMILES:O=C(O)c2nn(c1ccccc12)C
2. InChI:InChI=1/C9H8N2O2/c1-11-7-5-3-2-4-6(7)8(10-11)9(12)13/h2-5H,1H3,(H,12,13)
3. InChIKey:OVVDFORZEGKEJM-UHFFFAOYAK