Cker than most of drying oils whose refractive indices variety from 1.475 to 1.485 (Duel and Tr 1951). The saponification value with the oil in this study was 174.95 mg KOH/gm. This was decrease than the values for some typical oils like castor seed oil (185.83) (Akpan et al. 2007), palm oil (196-205 mgKOH/g), groundnut oil (188-196 mgKOH/g), corn oil (187-196 mgKOH/g) as reported by Akinhanmi et al. (2008), coconut oil (253 mg KOH/gm) and palm kernel oil (247 mg KOH/ gm) (Pearson, 1976). Nonetheless, this saponification worth is inside exactly the same range of some edible oils reported by Eromosele and Paschal (2002). Additionally, saponification worth (174.95) on the oil in this investigation is pretty much inside the selection of (175?87) ASTM (2002) specification for oils. As outlined by Pearson (1976), oils with reduce saponification values contain high quantity of lengthy chain fatty acids. Thus, the value obtained for brebra seed oil contained high quantity of greater fatty acids (because it is presented on Table six, fatty acids 18 carbonAndualem and Gessesse SpringerPlus 2014, three:298 http://springerplus/content/3/1/Page six ofTable 5 Brebra oil chemical and physical characteristicsOil physicochemical characteristics Colour Density at 20 Distinct gravity at 20 Kinematic Viscosity at 40 Acid value pH worth Saponification value Refractive index at 40 Iodine worth Peroxide value Ester valueAll values are mean worth of triplicates.Unit Kg/m3 kg/l mm2/s mg KOH/gValues Pale-yellow colour limpid liquid 0.942 0.926 40.59 0.39 six.mg KOH/g174.95 1.gI2/100 gm mEq/Kg104.48 6.88 174.chain accounts 92.8 ). The value of viscosity of brebra oil was 40.49 mm2/s (as described above) is located to become less than the viscosity of cashew nut oil (56 mm2/s) (Akinhanmi et al. 2008). For production of biodiesel, as a result, transesterification reaction could be the ideal system to lower the viscosity with the oil.1286754-61-7 site The oil beneath investigation has incredibly low acid worth of 0.39 mg KOH/g when compared with cashew nut oil (0.3-Methoxy-2,6-dimethyl-aniline Data Sheet 82 mg KOH/g) (Aremu et al. 2006), refined castor oil (0.869) and crude castor oil (1.148) (Akpan et al. 2007), plukenetia conophoora (11.five mg KOH/g) as reported by Akintayo and Bayer (2002), aenniseed (47.six ) by Ohsodi (1992). The acid value within this oil is under the maximum limit (2.0 mg KOH/g) of DIN EN ISO 660 and nearly within the range of ASTM specification (0.four – four.0) of castor oil (ASTM 2002).Table 6 Fatty acid composition of fatty acid of brebra oil (*FAs = fatty acids)No 1 2 3 4 5 Fatty acids Unsaturated FAs* Oleic Linoleic Linolenic Arachidonic Eurcic Total Saturated FAs* 6 7 8 9 Palmitic Stearic Arachidic Behenic Total C16:0 C18:0 C20:0 C22:0 7.PMID:23907521 2 1.9 three.3 6.9 19.three C18:1 C18:2 C18:three C20:four C22:1 0.6 48.2 27.7 0.8 3.4 80.7 Carbon quantity Quantity ( )The low saponification worth and acid worth imply that the oil is much more proper for biodiesel since the oil acid worth for biodiesel, which is less than 1 . The iodine worth of brebra oil was 104.48 gI2/100 gm (inside the range, 100-120 gI2/100 gm, of DIN) that is greater than the selection of 77?four gI2/100 gm olive oil, 8?0 gI2/ 100 gm coconut oil, 12?8 gI2/100 gm palm kernel, 44?58 gI2/100 gm palm oil, 85?5 palme oleine, 20?five gI2/ one hundred gm palme stearine, 50?0 gI2/100 gm tallow, 60?0 gI2/100 gm lard, (http://dec2.tec.agrar.tu-muenchen.de/ pflanzoel/rkstandarde.html) 44.four gI2/100 gm cashew nut oil (Aremu et al. 2006), 38.1 gI2/100 gm citrullus vulgaris (Achinewhu 1990), Hausa melon seed oil (38.50 gI2/100 gm) (Oladimeji et al. 2001) and 84.eight gI.