Eed oil of 57.5 CTm in the same temperature (Catarelli et al. 1993). It has density and precise gravity of 0.942 and 0.926 at 20 , respectively. The specific gravity of this study is reduced than the certain gravity of cashew nut (0.964) (Aremu et al., 2006) and caster seed oil (0.958) (Akpan et al. 2007). The refractive index of this study (1.473) is in close agreement with 1.465 (Aremu et al. 2006), 1.462 (Nav1.1 Inhibitor list Akintayo and Bayer 2002) and 1.468 (Akpan et al. 2007) of castor, akee pulp and cashew nut seed oils, respectively. This implied that brebra oil is less thicker than most of drying oils whose refractive indices variety from 1.475 to 1.485 (Duel and Tr 1951). The saponification value from the oil in this study was 174.95 mg KOH/gm. This was lower than the values for some prevalent oils like RORĪ³ Inhibitor list 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). Having said that, this saponification worth is inside the same selection of some edible oils reported by Eromosele and Paschal (2002). In addition, saponification worth (174.95) from the oil within this investigation is practically inside the array of (17587) ASTM (2002) specification for oils. As outlined by Pearson (1976), oils with decrease saponification values contain higher quantity of long chain fatty acids. Thus, the worth obtained for brebra seed oil contained high quantity of larger fatty acids (since it is presented on Table 6, fatty acids 18 carbonAndualem and Gessesse SpringerPlus 2014, 3:298 http://springerplus/content/3/1/Page six ofTable five Brebra oil chemical and physical characteristicsOil physicochemical traits Colour Density at 20 Certain gravity at 20 Kinematic Viscosity at 40 Acid value pH value Saponification value Refractive index at 40 Iodine worth Peroxide value Ester valueAll values are imply value 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 6.mg KOH/g174.95 1.gI2/100 gm mEq/Kg104.48 six.88 174.chain accounts 92.eight ). The worth of viscosity of brebra oil was 40.49 mm2/s (as mentioned above) is located to be significantly less than the viscosity of cashew nut oil (56 mm2/s) (Akinhanmi et al. 2008). For production of biodiesel, consequently, transesterification reaction will be the very best approach to lower the viscosity of the oil. The oil under investigation has extremely low acid value of 0.39 mg KOH/g when compared with cashew nut oil (0. 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 in this oil is below the maximum limit (2.0 mg KOH/g) of DIN EN ISO 660 and almost inside the selection of ASTM specification (0.4 – four.0) of castor oil (ASTM 2002).Table six Fatty acid composition of fatty acid of brebra oil (FAs = fatty acids)No 1 two 3 four five 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.two 1.9 three.3 six.9 19.3 C18:1 C18:two C18:3 C20:four C22:1 0.6 48.2 27.7 0.8 three.4 80.7 Carbon number Quantity ( )The low saponification worth and acid value imply that the oil is a lot more appropriate for biodiesel since the oil acid worth for biodiesel, which can be less than 1 . The iodine value of brebra o.