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Potassium dihydrogen phosphate, 5 kg

≥99 %, p.a., ACS
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Potassium phosphate monobasic, Potassium biphosphate, Monopotassium phosphate
Empirical formula KH2PO4
Molar mass (M) 136,09 g/mol
Density (D) 2,34 g/cm³
Melting point (mp) 255 °C
CAS No. 7778-77-0
EG-Nr. 231-913-4

Reagent for phosphate, buffer, molecular biology.

€360.15/Pack Qty. 

excl. VAT. | 5 kg per Pack Qty.

Art. No. 3904.3

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Potassium dihydrogen phosphate
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Art. No. Pack Qty. Pack. Price Quantity
3904.1 1 kg plastic


3904.2 250 g plastic


3904.3 5 kg plastic


3904.5 25 kg plastic


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Downloads / MSDS

General information

Salts for Analysis

Our salts for analysis are manufactured under strict production guidelines. Analytical purity and best quality reliably characterize each batch. Salts in p.a. quality made by Carl ROTH meet the high requirements for reproducible results. Most of our salts are additionally specified according to international standards like ACS and ISO.

p.a.: pro analysi (for analysis)ACS: American Chemical SocietyISO: International Standard Organisation


Certificates of Analysis

You can search for and download your certificate of analysis for the selected product here. Please provide your batch number.
The following analysis certificates have been found:

Guarantee analysis

Assay (acidim.)≥99,0 %
pH value (5 % in H2O)4,2-4,5
In H2O insoluble matter≤0,01 %
Loss on drying (105 °C)≤0,2 %
Total nitrogen (as N)≤0,001 %
Chloride (Cl)≤0,0005 %
Sulphate (SO4)≤0,003 %
Heavy metals≤0,001 %
Iron (Fe)≤0,001 %
Arsenic (As)≤0,0002 %
Lead (Pb)≤0,0005 %
Copper (Cu)≤0,0005 %
Calcium (Ca)≤0,005 %
Cadmium (Cd)≤0,0005 %
Cobalt (Co)≤0,0005 %
Magnesium (Mg)≤0,0005 %
Manganese (Mn)≤0,0005 %
Sodium (Na)≤0,005 %
Nickel (Ni)≤0,0005 %
Zinc (Zn)≤0,0005 %