Evening Primrose Oil,

Home/Products/Vegetable oils/Natural oils

Evening Primrose Oil

INCI name:	Oenothera biennis
Part used：	Seeds
Extraction method:	Cold pressing
CAS No.：	90028-66-3
Origin：	China

Physical Data and Chemical Properties

Appearance ：	Light yellow to yellow oily liquid
Odour：	Gentle and with a slight fragrance
Relative Density(20℃)：	0.912～0.928
Refractive index(20℃)：	1.472～1.483
Acid value (mgKOH/g):	≤2.0
Moisture and volatile matter (%)：	≤0.1
Soap change value：	N/A

The main fatty acid composition (%)：	Gamma linolenic acid (C18:3)： 8.0 ~ 12.0
	The oil acid (C18:2)：60.0 ~ 82.0
	Oil acid (C18:1)：4.7 ~ 15.0

Description

Oenothera biennis is a species of Oenothera native to eastern and central North America, from Newfoundland west to Alberta, southeast to Florida, and southwest to Texas, and widely naturalizedelsewhere in temperate and subtropical regions.Evening primrose oil is produced from the plant.

Oenothera biennis has a life span of two years (biennial) growing to 30–150cm (12–59 in) tall. The leaves are lanceolate, 5–20cm (2.0–7.9 in) long and 1–2.5cm (0.39–0.98 in) broad, produced in a tight rosette the first year, and spirally on a stem the second year.

Blooming lasts from late spring to late summer. The flowers are hermaphrodite, produced on a tall spike and only last until the following noon. They open visibly fast every evening producing an interesting spectacle, hence the name "evening primrose."

The blooms are yellow, 2.5–5cm (0.98–1.97 in) diameter, with four bilobedpetals. The flower structure has an invisible to the naked eye bright nectar guide pattern. This pattern is apparent under ultraviolet light and visible to its pollinators, moths, butterflies, and bees.

The fruit is a capsule 2–4cm (0.79–1.57 in) long and 4–6mm (0.16–0.24 in) broad, containing numerous 1–2mm (0.039–0.079 in) long seeds, released when the capsule splits into four sections at maturity.

中文站>>

Ecoarts Enterprise (Shanghai) Co., Ltd.