Spectrum Chemical manufactures and distributes fine chemicals with quality you can count on including those with CAS number 5351-23-5, Whether you call it p-Hydroxybenzoic Acid Hydrazide, 4-Hydroxybenzhydrazide or 4-Hydroxybenzoylhydrazine you can be assured the p-Hydroxybenzoic Acid Hydrazide products offered by Spectrum, meet or exceed the grade requirements or specifications for each individual product.