Methyl 2-acetoxybenzoate (Methyl acetylsalicylate) is a safe, simple anti-inflammatory aspirin prodrug. Methyl 2-acetoxybenzoate (Methyl acetylsalicylate) can be chemically or enzymatically hydrolyzed to methyl 2-hydroxybenzoate. It could be utilized as an analgesic in liniments and in the study of inflammatory diseases.

Physicochemical Properties

Molecular Formula	C10H10O4
Molecular Weight	194.18
Exact Mass	194.058
CAS #	580-02-9
PubChem CID	68484
Appearance	White to light yellow solid powder
Density	1.177g/cm3
Boiling Point	254.9ºC at 760mmHg
Melting Point	50°C
Flash Point	121.4ºC
Index of Refraction	1.51
LogP	1.398
Hydrogen Bond Donor Count	0
Hydrogen Bond Acceptor Count	4
Rotatable Bond Count	4
Heavy Atom Count	14
Complexity	224
Defined Atom Stereocenter Count	0
InChi Key	ONWPLBKWMAUFGZ-UHFFFAOYSA-N
InChi Code	InChI=1S/C10H10O4/c1-7(11)14-9-6-4-3-5-8(9)10(12)13-2/h3-6H,1-2H3
Chemical Name	methyl 2-acetyloxybenzoate
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]. Ultrasound-assisted lipase catalyzed hydrolysis of aspirin methyl ester. Ultrason Sonochem. 2018 Jan;40(Pt A):587-593.

Solubility Data

Solubility (In Vitro)

DMSO: 100 mg/mL (514.99 mM)

Solubility (In Vivo)

Solubility in Formulation 1: ≥ 2.5 mg/mL (12.87 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 (12.87 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 (12.87 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	5.1499 mL	25.7493 mL	51.4986 mL
	5 mM	1.0300 mL	5.1499 mL	10.2997 mL
	10 mM	0.5150 mL	2.5749 mL	5.1499 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.