Description
4-Nitrophenyl phosphate, disodium salt hexahydrate is a chromogenic substrate yielding a soluble yellow chromophor for the  colorimetric assay of phosphatases and is used for determining alkaline  phosphatase activity in human serum. 
 Product Specifications
4-Nitrophenyl phosphate, disodium salt hexahydrate
PNPP,  
p-nitrophenyl phosphate, 
para nitrophenyl phosphate, 
PNP-phos · 2 Na 
 MOLECULAR BIOLOGY GRADE 
 Formula: C6H4NO6PNa2 · 6H2O 
 MW: 371.15 g/mol 
 Storage/Handling: Store at -20°C. Protect from light.
 Literature: 
  - Lowry, O. H. (1957). [17] Micromethods for the assay of enzymes. 366-381.
  - Sugasawara, R. J., Prato, C. M., &  Sippel, J. E. (1984). Enzyme-linked immunosorbent assay with a  monoclonal antibody for detecting group A meningococcal antigens in  cerebrospinal fluid. Journal of clinical microbiology, 19(2), 230-234.