The Plumbagin, with the CAS registry number 481-42-5, is also known as 2-Methyl-5-hydroxy-1,4-naphthalenedione. It belongs to the product category of Anthraquinones, Hydroquinones and Quinones. Its EINECS registry number is 207-569-6. This chemical's molecular formula is C₁₁H₈O₃ and molecular weight is 188.18. What's more, both its IUPAC name and systematic name are the same which is called 5-Hydroxy-2-methylnaphthalene-1,4-dione. Plumbagin is a yellow dye, formally derived from naphthoquinone. It is regarded as a toxin. And this chemical is used as dye intermediates.

Physical properties about Plumbagin are: (1)ACD/LogP: 2.45; (2)# of Rule of 5 Violations: 0; (3)ACD/LogD (pH 5.5): 2.42; (4)ACD/LogD (pH 7.4): 1.67; (5)ACD/BCF (pH 5.5): 40.04; (6)ACD/BCF (pH 7.4): 7.06; (7)ACD/KOC (pH 5.5): 479.8; (8)ACD/KOC (pH 7.4): 84.56; (9)#H bond acceptors: 3; (10)#H bond donors: 1; (11)#Freely Rotating Bonds: 1; (12)Polar Surface Area: 43.37 Å²; (13)Index of Refraction: 1.63; (14)Molar Refractivity: 49.48 cm³; (15)Molar Volume: 138.9 cm³; (16)Surface Tension: 57.1 dyne/cm; (17)Density: 1.354 g/cm³; (18)Flash Point: 200.2 °C; (19)Enthalpy of Vaporization: 65.73 kJ/mol; (20)Boiling Point: 383.9 °C at 760 mmHg; (21)Vapour Pressure: 1.92E-06 mmHg at 25 °C.

When you are dealing with this chemical, you should be very careful. It is toxic if swallowed and it may cause burns. Therefore, you should wear suitable protective clothing, gloves and eye/face protection. In case of contacting with eyes, you should rinse immediately with plenty of water and seek medical advice. And in case of accident or if you feel unwell seek medical advice immediately.

You can still convert the following datas into molecular structure:
(1) SMILES: O=C\2c1c(O)cccc1C(=O)/C(=C/2)C
(2) InChI: InChI=1S/C11H8O3/c1-6-5-9(13)10-7(11(6)14)3-2-4-8(10)12/h2-5,12H,1H3
(3) InChIKey: VCMMXZQDRFWYSE-UHFFFAOYSA-N

The toxicity data is as follows: