Syrah African wines. In the United States, wine produced from the grape is normally called by its French name, "Syrah". However, in cases where winemakers choose to follow a New World style, similar to Penfolds Grange, they may choose to label their wines as "Shiraz". Under American wine laws, either name may appear on the label. Syrah first appeared as a wine grape in California in the 1970s, where it was planted by a group of viticulturists who called themselves "Rhône rangers". Although most plantings of the grape are in California, there are increasing amounts of it being grown in Washington
Phenolic content in wine grapes varies depending on the variety with Cabernet Sauvignon, Nebbiolo, Syrah and Tannat being 4 of the most tannic grape varieties. The reaction of tannins and anthocyanins with the phenolic compound catechins creates another class of tannins known as pigmented tannins which influence the color of red wine. Commercial preparations of tannins, known as "enological tannins", made from oak wood, grape seed and skin, plant gall, chestnut, quebracho, gambier and myrobalan fruits, can be added at different stages of the wine production to improve color durability. The tannins derived from oak influence are known as "hydrolysable tannins" being created from