Chemical Data Collections 20 (2019) 100208 Contents lists available at ScienceDirect Chemical Data Collections journal homepage: www.elsevier.com/locate/cdc Data Article Chemical composition of steam and solvent crude oil extracts from Azadirachta indica leaves D.E. Babatunde a,∗ , G.O. Otusemade a , V.E. Efeovbokhan a , M.E. Ojewumi a , O.P. Bolade b , T.F. Owoeye b a Department of Chemical Engineering, Covenant University, PMB 1023, Ota, Ogun State, Nigeria b Department of Chemistry, Covenant University, PMB 1023, Ota, Ogun State, Nigeria a r t i c l e i n f o Article history: Received 24 September 2018 Revised 19 February 2019 Accepted 27 February 2019 Available online 28 February 2019 Keywords: Essential oil Bioactive Herbal Extraction Chemical structure a b s t r a c t This work identifies the chemical components of Azadirachta indica (neem plant) leave extracts. A. indica is a vascular plant which belongs to the Meliaceae family and its use as herb in folk medicine is widely acclaimed. Essential oils were extracted from leaves of A. indica. Steam and solvent extraction methods were used with two sol- vents: Ethanol and Hexane. The crude oil extracted using both extraction methods were analyzed using GC–MS. The result of the analyses show that the major con- stituents were Eicosane (9.7662%), Diacenaphtho[1,2-j:1 ′ ,2 ′ -l]fluoranthene (11.301%), Phenol, 4-[[(4-methoxyphenyl)methylene]amino]- (11.84%) and (3Ar,6S,9ar)-1,2,3,4,5,6,7,9a- octahydro-8-methyl-3a,6-methano-3ah-cyclopentacycloocten-10-one (36.883%) in steam extracted oil; Eicosane (10.259%), Diacenaphtho[1,2-j:1 ′ ,2 ′ -l]fluoranthene (13.51%) and Butanamide, N-(2-methoxyphenyl)-3-oxo- (16.615%) in the ethanol extracted oil, and (3Ar,6S,9ar)-1,2,3,4,5,6,7,9a-octahydro-8-methyl-3a,6-methano-3ah-cyclopentacycloocten- 10-one (10.72%), n-Hexadecanoic acid (14.688%) and 9,12,15-Octadecatrienoic acid, (Z,Z,Z)- (34.719%) in the hexane extracted A. indica essential oil. © 2019 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license. (http://creativecommons.org/licenses/by/4.0/) Specifications Table Subject area Chemical Engineering, Biochemistry Compounds Active Ingredient Data category data of bioactive compounds in crude essential oil from neem and lemon plants Data acquisition format Mass spectra Data type Raw, analyzed Procedure Oil samples were analyzed using a gas chromatography-mass spectrometry analyzer, Agilent technologies 7890B GC system, operating at ionization energy of 70 eV with a HP-5MS capillary column (30 m × 0.25 mm; film thickness 0.50 μm). 1 μl of essential oil was injected in split/split less mode at a split ratio of 20:1 and an inlet temperature of 250 °C. The carrier gas used to aid the analysis of the essential oils was helium at a constant pressure mode of 9.4 psi. The oven was programmed to have a 3 °C/min incremental raise until it reached 240 °C from 60 °C. The mass spectrometry analyser was operated at a scan mode in 40–400 m/z range with an ion source and transfer line temperature at 230 and 300 °C respectively. ChemStation software was used in the analysis of the data acquired from the GC–MS. The constituents of the essential oils was determined based on their Kovats indices (KI), retention time (RT) and mass spectra with NIST. ∗ Coresponding author. E-mail address: damilola.babatunde@covenantuniversity.edu.ng (D.E. Babatunde). https://doi.org/10.1016/j.cdc.2019.100208 2405-8300/© 2019 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license. (http://creativecommons.org/licenses/by/4.0/)