5-Bromo-4-chloro-3-indolyl phosphate disodium salt (BCIP-Na) ≥99%, off-white powder

Supplier: MP Biomedicals

Synonyms: 5-Bromo-4-chloro-1H-indol-3-yl phosphate sodium, X-phosphate disodium salt, Sodium 5-bromo-4-chloro-1H-indol-3-yl phosphate

0215004283 0215004291 0215004250 0215004280
ICNA0215004283EA 343 SGD
ICNA0215004283 ICNA0215004291 ICNA0215004250 ICNA0215004280
5-Bromo-4-chloro-3-indolyl phosphate disodium salt (BCIP-Na) ≥99%, off-white powder
5-Bromo-4-chloro-3-indolyl phosphate disodium salt (BCIP-Na)

A chromogenic substrate for alkaline phosphatase.


For the colorimetric detection of alkaline phosphatase-labeled molecules, 5-Bromo-4-chloro-3-indolyl phosphate (BCIP) and Nitro Blue Tetrazolium (NBT) are available. The BCIP/NBT substrate system is versatile and functions in a variety of applications, including Northern Southern, and Western blotting, in situ hybridization, and immunohistochemistry. BCIP disodium salt is soluble in water. It may be used to prepare a stock solution, which in combination with NBT and a reaction buffer, form a substrate solution for alkaline phosphatase. This substrate system, when incubated with alkaline phosphatase, produces an insoluble NBT diformazan product that is easily observable with its purple color.


Disodium salt is soluble in water (50 mg/ml); insoluble in dimethylformamide.

Formula: C₈H₄BrClNNa₂O₄P
MW: 370,43 g/mol
Melting Pt: >300 °C (lit.)
Storage Temperature: Freezer
MDL Number: MFCD00036757
CAS Number: 102185-33-1

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Specification Test Results

Identity Test Passes
Purity ≥99%
FTIR Conforms to Reference
Loss on Drying ≤10%
UV/VIS: I max (water) 291 ± 3nm

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