苏丹Ⅳ 85-83-6 Sudan Ⅳ

能溶于油、脂肪、热苯，石蜡油或热的石蜡，几乎不溶于水。在醇或苯中呈微紫红色溶液，氢氧化钠对本品醇溶液显红紫色溶液，稀释则生成红色沉淀。 

Sudan苏丹红 IV 是一种疏水性偶氮染料。可使甘油三酯染色，并呈现强烈的红色。该染料不会污染脂质小滴或磷脂。

油和脂肪染色，苏丹Ⅳ可以用油红O(oil red O)代替；制造高温温度计用色

Sudan IV已被用于主动脉的“正面”染色，对富含脂质的斑块进行染色。它还被用于对小鼠的脂质动脉粥样硬化病变进行染色。

Sudan IV is a hydrophobic azo dye. It stains triglycerides and imparts an intense red color. The dye does not stain lipid droplets or phospholipids.

Sudan IV has been used to in en-face staining of aorta, stains the lipid rich plaques.[4] It has also been used to stain lipids atherosclerotic lesions of mice.