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S0751 Sigma-Aldrich

Sodium phosphate monobasic

ReagentPlus®, ≥99.0%

Synonym: Monosodium dihydrogen orthophosphate, Monosodium phosphate, Sodium dihydrogen phosphate



Related Categories Biochemicals and Reagents, Biological Buffers, Buffers A to Z, HIS Select Supporting Products and Reagents, HIS-Select,
grade   ReagentPlus®
assay   ≥99.0%
form   powder
pH   4.0 - 4.5 (25 °C, 50 g/L in water)
pKa (25 °C)   (1) 2.15, (2) 6.82, (3) 12.38 (phosphoric acid)



1 kg in poly bottle

100, 500 g in poly bottle

3 kg in poly drum

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Protocols & Articles


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Enzymatic methods for food analysis are highly specific and offer considerable time and cost savings over other methods, especially from the sample preparation standpoint. Sigma-Aldrich offers a wide...
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Keywords: Absorption, Clinical, Degradations, Diabetes, Enzyme activity, Food Analysis, Nutrition, Obesity, Sample preparations


Enzymatic Assay of Choloylglycine Hydrolase

To standardize a procedure for the determination of the enzymatic assay of choloylglycine hydrolase.
Keywords: Enzyme activity

Enzymatic Assay of Hyaluronidase (

The turbidimetric determination (% Transmittance at 600 nm, Light path = 1 cm) is based on the following reaction:
Keywords: Extinction coefficient

Enzymatic Assay of Trypsin Inhibitor

This procedure applies to all products that have a specification for Trypsin Inhibition at Sigma-Aldrich, St. Louis.

Enzymatic Assay of Trypsinogen

This scope of this procedure applies to products that have a specification for the enzymatic activity of trypsinogen.
Keywords: Enzyme activity, Extinction coefficient

Enzymatic Assay of Urease from Jack Beans

The scope of this procedure is for all products that have a specification for the enzymatic determination of Urease, from Jack Beans. This assay is not to be used to determine the activity of Urease,...
Keywords: Indicators, Sonication, Titrations

Enzymatic Assay of α-AMYLASE (EC

3.2. Unit Definition - One unit will liberate 1.0 mg of maltose from starch in 3 minutes at pH 6.9 at 20°C.
Keywords: Enzyme activity, Enzymology

Procedure for Enzymatic Assay of Trypsin (EC

This procedure is for products with a specification for Trypsin activity using Nα-Benzoyl-L-arginine ethyl ester (BAEE) as a substrate. The procedure is a continuous spectrophotometric rate determina...

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