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.
许多化学反应不是发生在纯固体、纯液体或纯气体之间，而是发生在溶解于水中或别的溶剂中的离子和分子之间。
Most chemical reactions take place, not between pure solids, liquids, or gases, but among ions and molecules dissolved in water or other solvents.
测试样本- - -当样品是可溶性固体，取适当质量，准确称量，溶解至无水甲醇或其他合适的溶剂中。
Test Preparation - Where the specimen is a soluble solid, dissolve an appropriate quantity, accurately weighed, in anhydrous methanol or other suitable solvents.
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