Spectrum Chemical manufactures and distributes fine chemicals with quality you can count on including those with CAS number 80029-43-2, Whether you call it 1-Hydroxybenzotriazole Monohydrate, HOBt Monohydrate or 1 -2 -3-Benzotriazole-1-ol Monohydrate you can be assured the 1-Hydroxybenzotriazole Monohydrate products offered by Spectrum, meet or exceed the grade requirements or specifications for each individual product.