Labdanum Resinoid

#### Labdanum Resinoid. This perfume material is prepared by extraction of the crude or cleaned labdanum (see this) with a hydrocarbon solvent. The method of extraction, particularly in respect to this product, has been greatly and successfully improved during the past decades. Selective solvent extraction has produced the most beautiful perfumery materials from this important natural. The labdanum ("gum") which is used for extraction is most often the Spanish labdanum. When benzene is used as a solvent, the yield of resinoid is quite good, but the product is very dark brown, rather hard, and not pourable at room temperature. It almost invariably carries a noticeable odor of the solvent. Petroleum ether has been used more frequently during the past years since it yields a beautiful light-amber-colored, pourable resinoid which contains the most wanted odor principles in high concentration. The yield is lower than in the case of benzene extraction, but the improved odor of the petroleum ether extract more than compensates for the loss in yield. Methanol, dichioromethylene, trichloroethylene and other solvents have also been tried out in the experimental extraction of labdanum. Some of these solvents have yielded interesting, attractive, light-colored extracts of various odor types. Due to the abuse of the terms "resinoid" or "resin" in commercial labelling of certain extracted perfume raw materials, it is not possible to give a general odor- or appearance-description of **Labdanum Resinoid**. In general, they are dark brown, semisolid resinous masses of a somewhat subdued labdanum odor (see labdanum absolute from resinoid). **Labdanum **Resinoid is a very useful fixative, sweetener and blender in soap perfumes of the "ambre" type, in fougères, chypres, lavender perfumes, colognes, tabac bases or aldehydic bases, etc. Its dark color is its main drawback, but the trade offers lighter colored extracts for special use, e.g. in white soaps or where a high concentration of labdanum is wanted. For other applications, see also **Labdanum Resin Absolute **and **Labdanum Resin**, **Labdanum**** ****Concrète**. **Labdanum Resinoid **is frequently marketed as a viscous pourable liquid. In such cases, the product contains a "plasticizing" solvent, e.g. 10 to *50%** *of Diethylphthalate. It would be ethical and correct if the suppliers label the diluted materials accordingly.