8-Hydroxycoumarin is an intermediate product of microbial transformation of quinolone active molecules.

Physicochemical Properties

Molecular Formula	C9H6O3
Molecular Weight	162.14
Exact Mass	162.032
CAS #	2442-31-1
PubChem CID	122783
Appearance	Off-white to pink solid powder
Density	1.403g/cm3
Boiling Point	361.6ºC at 760mmHg
Flash Point	170.3ºC
Vapour Pressure	9.86E-06mmHg at 25°C
Index of Refraction	1.64
LogP	1.498
Hydrogen Bond Donor Count	1
Hydrogen Bond Acceptor Count	3
Rotatable Bond Count	0
Heavy Atom Count	12
Complexity	222
Defined Atom Stereocenter Count	0
InChi Key	DPTUTXWBBUARQB-UHFFFAOYSA-N
InChi Code	InChI=1S/C9H6O3/c10-7-3-1-2-6-4-5-8(11)12-9(6)7/h1-5,10H
Chemical Name	8-hydroxychromen-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

References	[1]. Enhanced degradation of quinoline by coupling microbial electrolysis cell with anaerobic digestion simultaneous [published online ahead of print, 2020 Feb 28]. Bioresour Technol. 2020;306:123077.
Additional Infomation	8-Hydroxycoumarin has been reported in Murraya paniculata and Murraya exotica with data available.

Solubility Data

Solubility (In Vitro)

DMSO: 50 mg/mL (308.38 mM)

Solubility (In Vivo)

Solubility in Formulation 1: ≥ 2.5 mg/mL (15.42 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 (15.42 mM) (saturation unknown) in 10% DMSO + 90% (20% SBE-β-CD in 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 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 (15.42 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	6.1675 mL	30.8375 mL	61.6751 mL
	5 mM	1.2335 mL	6.1675 mL	12.3350 mL
	10 mM	0.6168 mL	3.0838 mL	6.1675 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.