硫化硼是一种无机化合物，化学式为B₂S₃。它曾在“高科技”玻璃与制备有机硫化合物方面受到重视。和硫化硅、硫化磷一样，硫化硼可以和水（或者潮湿的空气）反应，放出硫化氢。因此，硫化硼必须储存在无水环境中。

和氧化硼一样，硫化硼和其他硫化物（如P₄S₁₀）混合时，形成玻璃。与传统的硼硅玻璃相比，这类玻璃可以吸收低频的红外线的能量。

硫化硼可以将酮转化为相应的硫酮。例如，二苯甲酮转化为二苯甲硫酮的过程如下:

根据实践，B₂S₃有很高的实用价值。

Boron sulfide is the chemical compound with the formula B₂S₃. This polymeric material that has been of interest as a component of “high-tech” glasses and as a reagent for preparing organosulfur compounds. Like the sulfides of silicon and phosphorus, B₂S₃ reacts with water, including atmospheric moisture to release H₂S. Thus, samples must be handled under anhydrous conditions.