Tazarotene (Standard) is the standard substance of Tazarotene, and it is applicable for quantitative analysis, quality control, and related research in biochemical experiments. Tazarotene (Zorac) is a synthetic, topical retinoid. Tazarotene induces the expression of tazarotene-induced gene 3 (TIG3), a tumor suppressor gene. In psoriasis, tazarotene normalizes abnormal keratinocyte differentiation and reduces their hyperproliferation.