3-Methylindolin-2-one is an endogenously produced metabolite.

Physicochemical Properties

Molecular Formula	C9H9NO
Molecular Weight	147.18
Exact Mass	147.068
CAS #	1504-06-9
PubChem CID	150923
Appearance	White to yellow solid powder
Density	1.1±0.1 g/cm3
Boiling Point	279.3±29.0 °C at 760 mmHg
Melting Point	117-121ºC(lit.)
Flash Point	157.9±9.2 °C
Vapour Pressure	0.0±0.6 mmHg at 25°C
Index of Refraction	1.554
LogP	1.64
Hydrogen Bond Donor Count	1
Hydrogen Bond Acceptor Count	1
Rotatable Bond Count	0
Heavy Atom Count	11
Complexity	178
Defined Atom Stereocenter Count	0
InChi Key	BBZCPUCZKLTAJQ-UHFFFAOYSA-N
InChi Code	InChI=1S/C9H9NO/c1-6-7-4-2-3-5-8(7)10-9(6)11/h2-6H,1H3,(H,10,11)
Chemical Name	3-methyl-1,3-dihydroindol-2-one
HS Tariff Code	2934.99.9001
Storage	Powder-20°C 3 years 4°C 2 years In solvent -80°C 6 months -20°C 1 month
Shipping Condition	Room temperature (This product is stable at ambient temperature for a few days during ordinary shipping and time spent in Customs)

Biological Activity

Additional Infomation

3-methyloxindole is a member of the class of oxindoles that is oxindole (1,3-dihydro-2H-indol-2-one) in which one of the hydrogens at position 3 has been replaced by a methyl group. It is a member of oxindoles and a methylindole.

Solubility Data

Solubility (In Vitro)

DMSO: 50 mg/mL (339.72 mM)

Solubility (In Vivo)

Solubility in Formulation 1: ≥ 2.5 mg/mL (16.99 mM) (saturation unknown) in 10% DMSO + 40% PEG300 + 5% Tween80 + 45% Saline (add these co-solvents sequentially from left to right, and one by one), clear solution. For example, if 1 mL of working solution is to be prepared, you can add 100 μL of 25.0 mg/mL clear DMSO stock solution to 400 μL PEG300 and mix evenly; then add 50 μL Tween-80 to the above solution and mix evenly; then add 450 μL normal saline to adjust the volume to 1 mL. Preparation of saline: Dissolve 0.9 g of sodium chloride in 100 mL ddH₂ O to obtain a clear solution. Solubility in Formulation 2: 2.5 mg/mL (16.99 mM) in 10% DMSO + 90% (20% SBE-β-CD in Saline) (add these co-solvents sequentially from left to right, and one by one), suspension solution; with ultrasonication. For example, if 1 mL of working solution is to be prepared, you can add 100 μL of 25.0 mg/mL clear DMSO stock solution to 900 μL of 20% SBE-β-CD physiological saline solution and mix evenly. Preparation of 20% SBE-β-CD in Saline (4°C，1 week): Dissolve 2 g SBE-β-CD in 10 mL saline to obtain a clear solution. Solubility in Formulation 3: ≥ 2.5 mg/mL (16.99 mM) (saturation unknown) in 10% DMSO + 90% Corn Oil (add these co-solvents sequentially from left to right, and one by one), clear solution. For example, if 1 mL of working solution is to be prepared, you can add 100 μL of 25.0 mg/mL clear DMSO stock solution to 900 μL of corn oil and mix evenly.  (Please use freshly prepared in vivo formulations for optimal results.)

Preparing Stock Solutions		1 mg	5 mg	10 mg
	1 mM	6.7944 mL	33.9720 mL	67.9440 mL
	5 mM	1.3589 mL	6.7944 mL	13.5888 mL
	10 mM	0.6794 mL	3.3972 mL	6.7944 mL

*Note: Please select an appropriate solvent for the preparation of stock solution based on your experiment needs. For most products, DMSO can be used for preparing stock solutions (e.g. 5 mM, 10 mM, or 20 mM concentration); some products with high aqueous solubility may be dissolved in water directly. Solubility information is available at the above Solubility Data section. Once the stock solution is prepared, aliquot it to routine usage volumes and store at -20°C or -80°C. Avoid repeated freeze and thaw cycles.