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Magnesium sulphate, 1 kg

≥99 %, p.a., anhydrous
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Empirical formula MgSO4
Molar mass (M) 120,37 g/mol
Density (D) 2,66 g/cm³
WGK 1
CAS No. [7487-88-9]
EG-Nr. 231-298-2


Type analysis

€77.30/Pack Qty. 

excl. VAT. | 1 kg per Pack Qty.

Art. No. 0682.3

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0682.2 500 g glass €44.65
0682.3 1 kg glass €77.30
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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.

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

Desiccants

Desiccants can absorb water and bind it chemically (reversibly or irreversibly) or physically. The main desiccants can be subdivided into four categories:

• non-renewable chemical desiccants
• renewable chemical desiccants
• silica gels
• molecular sieves

Drying methods for solvents

Solvent Molecular

sieve
Potassium

carbonate
Calcium

chloride
Phosphous

pentoxide
Acetic acid - - - +
Acetic acid anhydride - - + -
Acetic acid ethyl ester 4 Å + - +
Acetic acid methyl ester 4 Å + - +
Acetone 3 Å + + -
Acetonitrile 3 Å + + +
Benzene 4 Å - + -
1-Butanol - + - -
2-Butanol - + - -
1-Butanone - + + -
Chloroform 4 Å - + +
Cyclohexane 4 Å - - -
Dichloremethane 4 Å - - -
Diethylether 4 Å - + -
Diisopropyl ether 4 Å - + -
Dimethyl formamide 4 Å - - -
Dioxan 4 Å - + -
Ethanol 3 Å - - -
Ethyle formate - - + -
n-Hexane 4 Å - - -
Methanol 3 Å - + -
2-Propanol 3 Å - - -
Pyridine 4 Å - - -
Tetrahydrofurane 4 Å - + -
Toluene 4 Å - + -
Trichloroethylene - + - -
Xylene (Isomer compound) 4 Å - + -

In order to achieve low residual water content over the silica gel, the capacity can only be utilised partially. The less silica gel is loaded with water the more intensively it dries. For example, to achieve a residual water content of 1 mg/l the loading must not be higher than 5,2 g water / 100 g silica gel.

QuEChERS Products

For pesticide residue analysis in food

Within a few years after its development the QuEChERS method has gained a leading position for determination of pesticide residues in food samples by GC-MS or LC-MS, allowing rapid and cheap clean-up of strongly matrix-contaminated samples. For optimizing the extraction of pH-dependent compounds, for minimizing decomposition of sensitive substances, and for broadening the matrix spectrum,different modifications of the QuEChERS method have been elaborated.
In addition to the required adsorbent Silica gel 60 diamino a number of individually weighed and premixed buffer and extraction mixtures is offered, specially composed for different sample matrices.
For extraction, the European standard EN 15662 recommends a citrate extraction mix (Mix I), while AOAC standard 2007.1 uses an acetate extraction mix (Mix II). For clean-up, the Diamino phase (PSA) removes, e.g., sugars and organic acids. Magnesium sulfate removes water, C18 ec removes non-polar interferences such as fats and the carbon phase removes pigments, sterols, and non-polar interferences. For selection of the proper clean-up mix see table below.

Analysis certificates

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:

Type analysis

Appearancewhite to off-white powder  
Assay≥99,0 %  
Chloride (Cl)≤0,05 %  
Arsenic (As)≤0,001 %  
Iron (Fe)≤0,002 %  
Heavy metals (as Pb)≤0,001 %  

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