FSS Black Walnut Husk
Preserved with Leucidal
Walnut is one of the most valuable natural forest trees in the U.S. The Black
Walnut tree is highly prized for its wood although other components of the tree
such as its fruit and bark also have significant use. Native Americans
extracted black dye from the roots and used the nuts as a food source though
now they’re used mainly for flavoring baked goods, pastries and
confectioneries. The wood, a rich dark brown color, is easy to work, has good
texture, strength, coarse-grained and very durable. For these reasons, it has
been and still is used in cabinet making, gunstocks, furniture and
Walnut or Juglans nigra is a large, deciduous tree reaching heights of
70-100 feet or more that can live more than 300 years. This is a vigorous, spreading
tree that can develop a trunk 2-4 feet in diameter and a crown spread of 70
feet, making it the perfect tree for shade and ornamentals. Black Walnut has
large, aromatic, compound leaves 1-2 feet long. It bears rather large, oval,
corrugated nuts that are encased in a thick, fleshy, yellow-green hull. It
grows best on deep, moist, fertile soil with full sun. The most notable
attribute is its characteristic smell. Various cultures have employed black
walnut medicinally. Topically, walnut juice was traditionally used as an
astringent. The bark was chewed to relieve toothaches and as a poultice was
used to reduce headaches. The bark has purgative properties while the sap was
used for skin inflammation.
green husk of the Black Walnut produces a brown stain resulting from the high
organic iodine content. The active ingredient responsible for the dyeing effect
of walnut husk is thought to be Juglone (5-hydroxynapthoquinone). Walnut husk
are also known to contain various flavonoids, carotenoids and tannins. Research
conducted at the University of Minnesota shows that the addition of Juglone to
preparations containing DHA provides photo protection and alleviates streaking.
This ingredient would be ideal as an addition to self-tanning products in order
to help consumers recognize the areas where product has been applied.
Black Walnut Husk Extract is an aqueous extract
produced from the husks of Juglans nigra, entirely free of iodine.
Studies have indicated that Juglone is capable of increasing SPF. This finding
is particularly of interest as Juglone shows poor UV absorbance relative to its
efficacy, indicating its potential to function as an anti-irritant. These
finding may be consistent with other studies that associate Juglone with
anti-cancer activity. Because of these properties, FSS Black Walnut Husk Extract
is an ideal additive for self-tanning formulations to be used as a marker.
Water & Juglans Nigra (Black
Walnut) Shell Extract
Dark brown to black liquid
pH: (direct @
Self-tanning marker, Anti-irritant
Soluble in any portion of water
Storage: Protected from direct light and humidity at a temperature of 50°-77°F
Shelf life: 12 months, properly stored, in sealed container.
product should be added to a formulation at the recommended usage rate.
Nowak, G.A., “A Classification of Plant Extract According to Their Effects and
Properties”, Cosmetic Preparations, Vol. 1, 1985.
Öllinger, K. & Brunmark, A. (1991) Effect of hydroxy substituent position
on 1,4napthoquinone toxicity to rat hepatocytes. J. Biol. Chem. ,266 (32),
Sugie, S., Okamoto, K., Rahman, K.M.W., Tanaka, T., Kawai, K., Yamahara, J.
& Mori, H.