KAT8-IN-1 is a lysine acetyltransferase 8 (KAT8) inhibitor (antagonist) with IC50s of 141 μM (KAT8), 221 μM (KAT2B), and 106 μM (KAT3B). KAT8 inhibits histone acetyltransferases (HATs), which may contribute to diseases like cancer or inflammation.

Physicochemical Properties

Molecular Formula	C10H7NO3
Molecular Weight	189.1675
Exact Mass	189.042
CAS #	605-62-9
PubChem CID	343829
Appearance	Yellow to brown solid powder
Density	1.4±0.1 g/cm3
Boiling Point	398.8±25.0 °C at 760 mmHg
Melting Point	165-168°C
Flash Point	179.8±11.6 °C
Vapour Pressure	0.0±1.0 mmHg at 25°C
Index of Refraction	1.714
LogP	2.8
Hydrogen Bond Donor Count	1
Hydrogen Bond Acceptor Count	3
Rotatable Bond Count	0
Heavy Atom Count	14
Complexity	226
Defined Atom Stereocenter Count	0
SMILES	O([H])C1=C([H])C([H])=C(C2=C([H])C([H])=C([H])C([H])=C21)[N+](=O)[O-]
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: Please store this product in a sealed and protected environment (e.g. under nitrogen), avoid exposure to moisture.
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

ln Vitro	KAT8-IN-1 (compound 19) no longer exhibits antioxidant action (EC50>1 mM)[1].
References	[1]. Wapenaar H, et al. The relevance of Ki calculation for bi-substrate enzymes illustrated by kinetic evaluation of a novel lysine (K) acetyltransferase 8 inhibitor. Eur J Med Chem. 2017 Aug 18;136:480-486.

Solubility Data

Solubility (In Vitro)

DMSO : ~100 mg/mL (~528.63 mM)

Solubility (In Vivo)

Solubility in Formulation 1: ≥ 1 mg/mL (5.29 mM) (saturation unknown) in 10% DMSO + 40% PEG300 +5% Tween-80 + 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 10.0 mg/mL clear DMSO stock solution to 400 μL of PEG300 and mix evenly; then add 50 μL of Tween-80 + to the above solution and mix evenly; then add 450 μL of 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.  (Please use freshly prepared in vivo formulations for optimal results.)

Preparing Stock Solutions		1 mg	5 mg	10 mg
	1 mM	5.2863 mL	26.4313 mL	52.8625 mL
	5 mM	1.0573 mL	5.2863 mL	10.5725 mL
	10 mM	0.5286 mL	2.6431 mL	5.2863 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.