ARABINOGALACTAN Chemical Properties

Melting point:

>200 °C (dec.)(lit.)

FEMA 

3254 | ARABINOGALACTAN

refractive index 

10 ° (C=1, H2O)

storage temp. 

2-8°C

solubility 

H₂O: 50 mg/mL, clear to slightly hazy, faintly yellow

form 

lyophilized powder

color 

White to Pale Beige

Odor

at 100.00 %. very mild balsam pine resin

Odor Type

balsamic

CAS DataBase Reference

9036-66-2

EPA Substance Registry System

D-Galacto-L-arabinan (9036-66-2)

Safety Information

Safety Statements 

22-24/25

WGK Germany 

3

F 

3-10

HS Code 

2940.00.6000

MSDS

• Language:English Provider:SigmaAldrich

ARABINOGALACTAN Usage And Synthesis

Chemical Properties

Polyarabinogalactan possesses a soft, balsamic terpenic odor, reminiscent of fresh conifer resins and cones. It is a turpentine type of a natural oleoresin. It occurs as a physiological secretion in the larch tree, Larix decidua, a conifer.

Chemical Properties

Dry, light-tan powder. Readily soluble in hot and cold water; both powder and solutions fairly stable. Combustible.

Occurrence

Reported found in the secretion of the larch tree, Larix deciduas

Uses

immune stimulant, antineoplastic agent

Uses

galactoarabinan (GA) is a multi-functional ingredient with humectant and exfoliating properties. In aqueous solutions, gA can deposit a clear film, creating or helping to create an occlusive environment, preventing transepidermal water loss and enhancing the functionality of a formulation’s active ingredients. In humid conditions gA acts as a moisture binder, and in dry conditions, it is able to retain moisture, further inhibiting moisture loss from the skin. Additionally, gA can improve particle dispersion and the uniformity of emulsion droplets resulting in a more stable emulsion and potentially more efficacious formulation, particularly in the case of sunscreens. In vitro and in vivo studies indicate possible benefit to the immune system given an ability to enhance Langerhans cell proliferation and cytokine production. gA has been shown to boost AHA exfoliation activity without increasing skin irritation, and it also exhibits its own exfoliant properties independent of AHA presence in a formulation, thereby helping reduce the appearance of fine lines and wrinkles. gA is a polysaccharide found in all plants and is the dominant sugar of the western larch tree.

Uses

Arabinogalactan is a gum, being the plant extract obtained from larch trees. it is soluble in hot and cold water, the water solutions up to 60% being fluid and above 60% forming a thick paste. it is stable over a wide ph range and is relatively unaffected by electrolytes. its limited uses include dressings and pudding mixes. it is also termed larch gum.

Preparation

Natural turpentine is obtained from tapping or scraping the wounds on a variety of coniferous trees. Separating the essential oil and solid content of crude turpentine makes pure gum spirits. The crude gum is heated, refined and separated by distillation into gum spirits and rosin.

Definition

A water-soluble polysaccharide extracted from timber of the western larch trees. It is a complex, highly branched polymer of arabinose and galactose.

Biochem/physiol Actions

Dietary fiber that enhances immune system function by stimulating natural killer (NK) cell activity.

Safety Profile

When heated to decomposition it emits acrid smoke and irritating fumes.

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