This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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n. The state or condition of being stainable.

n. In histology, the ability to take up a stain: said of cells or tissues.

n. (cytology) the capacity of cells or cell parts to stain specifically with certain dyes

"Their products address the need for protection from electrical fires claiming annually, in the United States alone, about $1.4 billion in property damages/losses and about 400 deaths. www.wateroptimizer.com, Tampa, their green technology helps address the pressing challenge of providing for the stainability and efficient management of limited water resources."

unstainability   

tendency    inclination   

basophilia