Date published: 2025-9-5

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HRP and AP Substrates

Santa Cruz Biotechnology now offers a broad range of HRP and AP substrates for use in various applications. HRP (horseradish peroxidase) and AP (alkaline phosphatase) substrates are essential reagents in immunoassays and molecular biology techniques, where they are used to detect the presence of specific proteins, nucleic acids, or other biomolecules. These substrates react with their respective enzymes, HRP or AP, to produce a detectable signal, typically colorimetric, chemiluminescent, or fluorescent, which indicates the presence and quantity of the target molecule. Researchers use HRP and AP substrates extensively in applications such as Western blotting, ELISA, immunohistochemistry, and in situ hybridization. These substrates are crucial for achieving high sensitivity and specificity in these assays, enabling the detection of low-abundance targets and providing quantitative and qualitative data on biomolecular interactions. By offering a comprehensive selection of high-quality HRP and AP substrates, Santa Cruz Biotechnology supports advanced research in biochemistry, cell biology, and diagnostic development. These products empower scientists to conduct precise and reproducible experiments, driving discoveries and innovations in understanding biological processes and developing new analytical methods. View detailed information on our available HRP and AP substrates by clicking on the product name.

Items 1 to 10 of 32 total

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Product NameCAS #Catalog #QUANTITYPriceCitationsRATING

TMB Substrate Buffer, 1X

sc-286967
sc-286967A
100 ml
1 L
$122.00
$377.00
4
(3)

TMB Substrate Buffer, 1X, is a chromogenic substrate that exhibits a distinct affinity for horseradish peroxidase (HRP) and alkaline phosphatase (AP). Its unique electron-donating properties facilitate the formation of a colored product upon enzymatic reaction, allowing for sensitive detection. The buffer's pH stability and optimal ionic strength enhance enzyme activity, while its ability to undergo rapid oxidation contributes to efficient signal amplification in assays.

DAB, 50X

7411-49-6sc-24982
sc-24982B
sc-24982A
10 ml
15 ml
100 ml
$105.00
$156.00
$520.00
88
(3)

DAB, 50X, serves as a potent chromogenic substrate for horseradish peroxidase (HRP) and alkaline phosphatase (AP), characterized by its ability to form a stable, colored precipitate upon enzymatic action. Its unique structural features promote specific interactions with enzyme active sites, enhancing reaction kinetics. The compound's hydrophobic nature aids in solubility and diffusion, ensuring effective substrate availability, while its robust stability under varying conditions supports consistent assay performance.

PNPP, Disodium Salt

4264-83-9sc-3720
sc-3720A
25 g
250 g
$87.00
$387.00
21
(2)

PNPP, Disodium Salt, is a versatile chromogenic substrate that exhibits remarkable specificity for horseradish peroxidase (HRP) and alkaline phosphatase (AP). Its unique molecular structure facilitates efficient enzyme-substrate interactions, leading to rapid reaction kinetics. The compound's ionic nature enhances solubility in aqueous environments, promoting effective diffusion. Additionally, its stability across a range of pH levels ensures reliable performance in various biochemical assays.

BCIP/NBT Stock Solution, 50X

sc-24981
8 ml
$195.00
39
(1)

BCIP/NBT Stock Solution, 50X, is a potent chromogenic substrate that demonstrates exceptional reactivity with horseradish peroxidase (HRP) and alkaline phosphatase (AP). Its unique electron-rich structure allows for specific redox reactions, resulting in a vivid colorimetric change. The compound's ability to form stable complexes with metal ions enhances its sensitivity, while its low background noise ensures clear signal detection in various biochemical applications.

AEC Substrate Buffer, 10X

sc-36873
50 ml
$175.00
4
(1)

AEC Substrate Buffer, 10X, is a versatile reagent that facilitates enzymatic reactions involving horseradish peroxidase (HRP) and alkaline phosphatase (AP). Its unique formulation promotes optimal pH stability, enhancing enzyme activity and reaction kinetics. The buffer's specific ionic interactions contribute to improved substrate solubility and reactivity, allowing for precise control over enzymatic pathways. This results in reliable and reproducible colorimetric outputs in various assays.

3,3′-Diaminobenzidine tetrahydrochloride

868272-85-9sc-209686
sc-209686A
sc-209686B
sc-209686C
1 g
5 g
25 g
100 g
$56.00
$116.00
$490.00
$1438.00
35
(2)

3,3'-Diaminobenzidine tetrahydrochloride is a potent chromogenic substrate that exhibits remarkable specificity in enzymatic reactions with horseradish peroxidase (HRP) and alkaline phosphatase (AP). Its unique electron-donating properties facilitate rapid oxidation, leading to the formation of a stable, colored precipitate. The compound's ability to form strong hydrogen bonds enhances its interaction with enzyme active sites, optimizing reaction rates and improving sensitivity in detection assays.

3,3′-Diaminobenzidine

91-95-2sc-216567
sc-216567A
sc-216567B
sc-216567C
sc-216567D
1 g
5 g
25 g
100 g
250 g
$31.00
$63.00
$179.00
$578.00
$1331.00
120
(2)

3,3'-Diaminobenzidine is a versatile chromogenic substrate known for its exceptional reactivity with horseradish peroxidase (HRP) and alkaline phosphatase (AP). Its structure allows for efficient electron transfer, promoting swift enzymatic oxidation. The compound's planar configuration enhances π-π stacking interactions, which can stabilize enzyme-substrate complexes. This results in increased reaction kinetics and improved signal amplification in various biochemical assays.

BCIP/NBT-Blue Liquid Substrate System for Membranes

sc-291929
100 ml
$165.00
17
(1)

BCIP/NBT-Blue Liquid Substrate System is a highly sensitive chromogenic substrate that exhibits unique interactions with horseradish peroxidase (HRP) and alkaline phosphatase (AP). Its distinct chemical structure facilitates the formation of a blue precipitate through a series of redox reactions, enhancing visual contrast in assays. The substrate's solubility and stability in aqueous environments contribute to consistent performance, while its ability to generate a stable colorimetric signal allows for precise quantification in various analytical applications.

BCIP/INT, 1X

sc-24980
100 ml
$80.00
7
(1)

BCIP/INT, 1X is a versatile chromogenic substrate that engages in specific electron transfer mechanisms with horseradish peroxidase (HRP) and alkaline phosphatase (AP). Its unique molecular architecture promotes rapid reaction kinetics, leading to the formation of an intense purple product. This substrate's exceptional solubility and compatibility with diverse assay conditions ensure reliable performance, making it ideal for generating distinct colorimetric signals in various biochemical analyses.

PPHP

87864-20-8sc-204856
sc-204856A
500 µg
1 mg
$156.00
$296.00
(0)

PPHP serves as a versatile substrate for horseradish peroxidase (HRP) and alkaline phosphatase (AP), characterized by its unique ability to engage in specific molecular interactions that enhance enzymatic activity. Its distinct chemical structure promotes rapid electron transfer, leading to accelerated reaction kinetics. Additionally, PPHP's stability under diverse conditions allows for consistent product formation, making it an essential tool in various biochemical assays for reliable analytical results.