4-Nitrophenyl phosphate disodium salt hexahydrate, 25 g
Molar mass (M) 371,12 g/mol
Melting point (mp) >300 °C
Storage temp. -20 °C
Transport temp. ambient temp.
CAS No. [4264-83-9]
Application: Working solution: 1 mg/ml in diethanolamine substrate buffer (10 mM diethanolamine, 0.5 mM MgCl2, pH 9.5). For endpoint analysis the reaction may be stopped via addition of 2-3 M NaOH.
excl. VAT. | 25 g per Pack Qty.
Art. No. 4165.9
Now recurring orders conveniently delivered as a subscription!
With the new Carl Roth Replenishment Service you can let products be ordered automatically which you need regularly in your lab!How it works:
Put all products for your subscription in the desired quantity in the basket.
In the shopping cart, select the option "Order shopping cart as subscription" Order as subscription.
Set Starty point and interval for your subscription and submit order!
By the way: Through your account you can customize or delete your subscriptions anytime.
4-Nitrophenyl phosphate disodium salt hexahydrate ≥99 %, p.a.
Substrate of the alkaline phosphatase for use in ELISAs. During reaction of the substrate, a soluble, yellow product is formed that is detected photometrically at 405 nm wave length.
|Signal product||soluble (ELISA, activity assay)|
- Subtotal: 0.00
|Order No.||Pack Qty.||Pack.||Price||Quantity|
Available at short notice
Delivery date currently unknown
Stock solutions (All solutions are stable for at least 1 year at 4 °C):
0.5 g NBT in 10 ml 70 % dimethylformamide;
0.5 g BCIP (p-toluidine salt) in 10 ml 100 % dimethylformamide.
Incubation buffer for alkaline phosphatase:
100 mM NaCl, 5 mM MgCl2,100 mM Tris (pH 9.5).
Fresh substrate solution: 66 μl NBT stock solution + 10 ml incubation buffer, mix well, add 33 μl BCIP stock solution. Use within 1 hour.
Blot development: Approx. 10 ml substrate solution per 15 x 15 cm2 membrane surface. Develop at room temperature until bands become visible (approx. 30 mins).
Reaction stop: Rinse with PBS/20 mM EDTA.
Dissolve 1 mg TMB in 0.1 ml dimethylsulfoxide (Art. No. 4720); add 9.9 ml of a 0.1 M sodium acetate solution (pH 6.0) (Powder: Art. No. 6779), filter and add H2O2 (Art. No. 8070) (final concentration 0.01 %).
Always prepare freshly!
Incubation 10-30 mins at room temperature (approx. 50 μl per microtitre well; finally add 50 μl 1 M H2SO4, Art. No. X873, per well).
Photometric quantitation at 450 nm.
Reference: Bos, E.S. et al., (1981) J. Immunoassay 2, (3/4), 187.
|Assay (HPLC)||≥99,0 %|
|Solution (5 % in H2O)||clear, colourless to yellow|
|Free 4-nitrophenol||≤0,01 %|