Aminopicoline (Ascensil) is a potent and non-selective inhibitor of NO synthase (NOS) isoenzymes (iNOS, nNOS, eNOS).

Physicochemical Properties

Molecular Formula	C6H8N2
Molecular Weight	108.14
Exact Mass	108.068
CAS #	695-34-1
PubChem CID	1533
Appearance	White to off-white solid powder
Density	1.1±0.1 g/cm3
Boiling Point	227.4±20.0 °C at 760 mmHg
Melting Point	96-99 °C(lit.)
Flash Point	114.0±9.0 °C
Vapour Pressure	0.1±0.4 mmHg at 25°C
Index of Refraction	1.574
LogP	1.08
Hydrogen Bond Donor Count	1
Hydrogen Bond Acceptor Count	2
Rotatable Bond Count	0
Heavy Atom Count	8
Complexity	72.9
Defined Atom Stereocenter Count	0
InChi Key	ORLGLBZRQYOWNA-UHFFFAOYSA-N
InChi Code	InChI=1S/C6H8N2/c1-5-2-3-8-6(7)4-5/h2-4H,1H3,(H2,7,8)
Chemical Name	4-methylpyridin-2-amine
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 Note: This product requires protection from light (avoid light exposure) during transportation and storage.
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]. The inhibitory potency and selectivity of arginine substrate site nitric-oxide synthase inhibitors is solely determined by their affinity toward the different isoenzymes. Mol Pharmacol. 2000;58(5):1026-1034.
Additional Infomation	2-Amino-4-methylpyridine has been reported in Vachellia rigidula with data available.

Solubility Data

Solubility (In Vitro)

DMSO: ≥ 100 mg/mL (924.73 mM) H2O: 50 mg/mL (462.36 mM)

Solubility (In Vivo)

Solubility in Formulation 1: ≥ 2.5 mg/mL (23.12 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 (23.12 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 (23.12 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	9.2473 mL	46.2364 mL	92.4727 mL
	5 mM	1.8495 mL	9.2473 mL	18.4945 mL
	10 mM	0.9247 mL	4.6236 mL	9.2473 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.