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4264-83-9

4264-83-9 structure
4264-83-9 structure
  • Name: PNPP
  • Chemical Name: Disodium 4-nitrophenylphosphate
  • CAS Number: 4264-83-9
  • Molecular Formula: C6H4NNa2O6P
  • Molecular Weight: 219.089
  • Catalog: Organic raw materials Organometallic compound Organic sodium
  • Create Date: 2018-08-13 17:33:24
  • Modify Date: 2025-08-20 15:08:06
  • PNPP is a non-proteinaceous chromogenic substrate for alkaline and acid phosphatases used in ELISA and conventional spectrophotometric assays.
Name Disodium 4-nitrophenylphosphate
Synonyms 4-Nitrophenyl dihydrogen phosphate
disodium,(4-nitrophenyl) phosphate
4-Nitrophenylphosphoric Acid Disodium Salt
4-Nitrophenyl phosphate disodium salt
Phosphoric acid mono(4-nitrophenyl) ester
4-Nitrophenyl phosphate disodium salt hexahydrate
p-Nitrophenyl Phosphate Liquid Substrate System
p-nitro-Phenol dihydrogen phosphate
4-Nitrophenyl phosphate,disodium salt,hexahydrate
para-Nitrophenylphosphate
EINECS 224-246-5
MFCD00007319
Phosphoric acid mono(p-nitrophenyl) ester
Phosphoric acid, mono(4-nitrophenyl) ester
Sodium 4-nitrophenyl phosphate
PNPP
Description PNPP is a non-proteinaceous chromogenic substrate for alkaline and acid phosphatases used in ELISA and conventional spectrophotometric assays.
Related Catalog
In Vitro Phosphatases catalyze the hydrolysis of PNPP liberating inorganic phosphate and the conjugate base of para-nitrophenol (pNP). The resulting phenolate is yellow, with a maximal absorption at 405 nm[1].
Density 1.7±0.1 g/cm3
Boiling Point 457.8±47.0 °C at 760 mmHg
Melting Point >300 °C(lit.)
Molecular Formula C6H4NNa2O6P
Molecular Weight 219.089
Flash Point 230.7±29.3 °C
Exact Mass 218.993271
PSA 128.05000
LogP 0.37
Vapour Pressure 0.0±1.2 mmHg at 25°C
Index of Refraction 1.617
Storage condition 2-8°C
Stability Stable, but may be light sensitive. Incompatible with strong acids, strong bases, strong oxidizing agents.
Water Solubility H2O: 1 tablet/3 mL 25 mM, clear, light yellow
Symbol GHS05 GHS08
GHS05, GHS08
Signal Word Danger
Hazard Statements H290-H315-H318-H373
Precautionary Statements P260-P280-P305 + P351 + P338 + P310
Hazard Codes Xi: Irritant;
Risk Phrases R36/37/38
Safety Phrases S26-S36-S24/25-S23
RIDADR NONH for all modes of transport
WGK Germany 3
HS Code 2919900090
Precursor  1

DownStream  1

HS Code 2919900090
Summary 2919900090 other phosphoric esters and their salts, including lactophosphates; their halogenated, sulphonated, nitrated or nitrosated derivatives。supervision conditions:AB(certificate of inspection for goods inward,certificate of inspection for goods outward)。VAT:17.0%。tax rebate rate:9.0%。MFN tariff:6.5%。general tariff:30.0%
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