本品（炎痛息康）为白色至类白色结晶固体，难溶于水、稀酸及大多数有机溶剂中。
It occurs as a white to off-white, crystalline solid, poorly soluble in water, dilute acid and most organic solvents.
金属离子和无机酸的阴离子生成一种难溶的盐。
The metal ion and the anion of the mineral acid form an insoluble salt.
锌焙砂含有少量难溶的铁酸锌，通过还原焙烧可以降低铁酸锌含量。
Zinc calcine contains a small amount of refractory zinc ferrite that can be reduced by reduction roasting.
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