Walnut Oil,

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Walnut Oil

INCI name:	Juglans regia
Part used：	Nults
Extraction:	Cold pressing
CAS No.：	8024-09-7
Origin：	France,USA

Physical Data and Chemical Properties

Appearance ：
Odour：
Relative Density(20℃)：
Refractive index(20℃)：
Acid value (mgKOH/g):
Peroxide value(mmol/kg)：
Soap change value：	N/A

Description

Juglans regia, Persian walnut, English walnut, or especially in Great Britain, common walnut, is an Old World walnut tree species native to the region stretching from the Balkans eastward to the Himalayas and southwest China. The largest forests are inKyrgyzstan, where trees occur in extensive, nearly pure walnut forests at 1,000–2,000 m altitude—notably at Arslanbob in Jalal-Abad Province. It is widely cultivated across Europe.

Juglans regia is a large, deciduous tree attaining heights of 25–35m, and a trunk up to 2m diameter, commonly with a short trunk and broad crown, though taller and narrower in dense forest competition. It is a light-demanding species, requiring full sun to grow well.

The bark is smooth, olive-brown when young and silvery-grey on older branches, and features scattered broad fissures with a rougher texture. Like all walnuts, the pith of the twigs contains air spaces; this chambered pith is brownish in color. The leaves are alternately arranged, 25–40cm long, odd-pinnate with 5–9 leaflets, paired alternately with one terminal leaflet. The largest leaflets are the three at the apex, 10–18cm long and 6–8cm broad; the basal pair of leaflets are much smaller, 5–8cm long, with the margins of the leaflets entire. The male flowers are in drooping catkins 5–10cm long, and the female flowers are terminal, in clusters of two to five, ripening in the autumn into a fruit with a green, semifleshy husk and a brown, corrugated nut. The whole fruit, including the husk, falls in autumn; the seed is large, with a relatively thin shell, and edible, with a rich flavour.

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