The 2,3-Dichloro-1,4-naphthoquinone, with the CAS registry number 117-80-6 and EINECS registry number 204-210-5, has the systematic of 2,3-dichloronaphthalene-1,4-dione. And the molecular formula of this chemical is C₁₀H₄Cl₂O₂. It is a kind of yellow fine crystalline powder, and belongs to the product category of Intermediates of Dyes and Pigments. What's more, it is used as agricultural fungicide.

The physical properties of 2,3-Dichloro-1,4-naphthoquinone are as following: (1)ACD/LogP: 2.35; (2)# of Rule of 5 Violations: 0; (3)ACD/LogD (pH 5.5): 2.35; (4)ACD/LogD (pH 7.4): 2.35; (5)ACD/BCF (pH 5.5): 36.07; (6)ACD/BCF (pH 7.4): 36.07; (7)ACD/KOC (pH 5.5): 453.11; (8)ACD/KOC (pH 7.4): 453.11; (9)#H bond acceptors: 2; (10)#H bond donors: 0; (11)#Freely Rotating Bonds: 0; (12)Polar Surface Area: 34.14 Å²; (13)Index of Refraction: 1.634; (14)Molar Refractivity: 52.57 cm³; (15)Molar Volume: 146.9 cm³; (16)Polarizability: 20.84×10^-24cm³; (17)Surface Tension: 55.3 dyne/cm; (18)Density: 1.54 g/cm³; (19)Flash Point: 127.5 °C; (20)Enthalpy of Vaporization: 54.44 kJ/mol; (21)Boiling Point: 304 °C at 760 mmHg; (22)Vapour Pressure: 0.000897 mmHg at 25°C.

Preparation of 2,3-Dichloro-1,4-naphthoquinone: It can be prepared by the chlorination of 1,4 - naphthoquinone. The reaction will need will occur in the alcohols, phenols and hydrocarbons solvent. And the catalyst ferrous powder or iron chloride.

Uses of 2,3-Dichloro-1,4-naphthoquinone: It can react with 5-methyl-benzene-1,3-diol to produce 3-hydroxy-1-methyl-benzo[b]naphtho[2,3-d]furan-6,11-quinone. This reaction will need reagent NaOEt, and the solvent ethanol. And the yield is about 60%.

You should be cautious while dealing with this chemical. It irritates eyes, respiratory system and skin, and it is also harmful if swallowed. What's more, it is very toxic to aquatic organisms, and may cause long-term adverse effects in the aquatic environment. Therefore, you had better take the following instructions: This material and/or its container must be disposed of as hazardous waste; Avoid release to the environment. Refer to special instructions safety data sheet; In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.

You can still convert the following datas into molecular structure:
(1)SMILES: O=C2c1c(cccc1)C(=O)C(/Cl)=C2/Cl
(2)InChI: InChI=1/C10H4Cl2O2/c11-7-8(12)10(14)6-4-2-1-3-5(6)9(7)13/h1-4H
(3)InChIKey: SVPKNMBRVBMTLB-UHFFFAOYAD

The toxicity data is as follows: