Chemical

Description

CAS number: 1898-66-4
Linear Formula: C₁₈H₁₂N₅O₆
Purity: ≥90% by elemental analysis

DPPH, Merck is a cell-permeable, stable free radical that acts as a hydrogen radical scavenger. Useful in inducing free-radical injury to tissues and as a screening tool for detecting free radical scavenging activity of antioxidants. Absorption max: ~517 nm. Protect the DPPH from light.

Description

CAS number: 110-54-3
Linear Formula: CH₃(CH₂)₄CH₃
Molecular Weight 86.18 g/mol

EMPLURA® is our low-cost alternative to high-purity qualities. With EMPLURA® we offer a range of solvents for a plurality of basic applications in non-regulated industries and for less demanding applications, preparative laboratory work and cleaning purposes. EMPLURA® solvents provide adequate specifications with the most important parameters.

Application

For basic applications in non-regulated industries and for less demanding applications, preparative laboratory work and cleaning purposes.

Description

CAS number: 9005-64-5
Synonyms: Polysorbate 20, Polyoxyethylene (20) sorbitan monolaurate, PEG(20)sorbitan monolaurate
Form: Pale yellow liquid

Non-ionic detergent used for immunoprecipitation and for the solubilization of membrane-bound proteins.

Product Specification and MSDS for TWEEN® 20 Detergent (Merck).

Description

CAS number: 57-09-0
Chemical Formula: C₁₉H₄₂BrN
Synonyms: Cetrimide, CTAB
Purity: ≥98% by TLC
Contaminants: DNases, proteases, RNases: none detected

Cationic detergent is suitable for the isolation of high molecular weight DNA in plants and other organisms.

Product Specification and MSDS for Cetyltrimethylammonium Bromide for Molecular (Merck).

Description

1X TE Solution, pH 8.0 (10mM TRIS-HCl, 1mM EDTA). Molecular Biology grade.

Specifications:
Conductivity at 25°C: 775-975 µmho
DNase: None detected
pH of solution at 25°C: 7.90-8.10
Protease: None detected
RNase: None detected

MSDS for TE Buffer pH8.0 (Merck).

Description

CAS number: 67-56-1
Chemical Formula: CH₃OH
Molar Mass: 32.04 g/mol
Synonyms: MeOH, Hydroxymethane, Methyl alcohol, Carbinol

We offer EMPARTA® grade solvents for routine tasks in analytical laboratories. EMPARTA® grade solvents offer fewer test parameters than EMSURE®, yet are still of high quality. EMPARTA® solvents meet ACS requirements, making them ideal for a wide range of analytical applications.

Product Specification and MSDS for Methanol Emparta® (Merck).

**This product has been discontinued, please contact us for more information.

Description

The Giemsa’s Azure Eosin Methylene Blue solution can be used for the staining of blood and bone marrow smears, paraffin sections and clinical-cytological specimens. Giemsa staining is one of the standard procedures in histology, demonstrating various cells with their morphological features better than with H&E stain. The Giemsa stain can also be used to detect Helicobacter pylori in gastric tissue biopsies. The specimen material will show cell nuclei stained in various shades of blue, while other structures will appear in various red types. It is an IVD product and CE registered.

Application

For microscopy. For the staining of blood and bone-marrow smears, paraffin sections and clinical-cytological specimens

Product Specification and MSDS for Giemsa’s Stain (Merck).

Description

CAS Number: 67-56-1
Chemical Formula: CH₃OH
Molecular Weight: 32.04 g/mol
Synonyms: MeOH, Hydroxymethane, Methyl alcohol, Carbinol
Quality Level: MQ100

With their high degree of UV transmittance, low particle count, low acidity and alkalinity and low evaporation residue level, LiChrosolv® solvents are ideal for reproducible separations. Since separations are normally carried out under gradient conditions in analytical HPLC, we offer solvents in “gradient grade” as well as “isocratic grade”. This enables to minimize the gradient effect of the solvent involved.

Product Specification and MSDS for Methanol, LiChrosolv® (Merck).

Description

CAS Number: 78-93-3
Chemical Formula: C₂H₅COCH₃
Molecular Weight: 72.11 g/mol
Synonyms: 2-Butanone, Methyl ethyl ketone, MEK
Quality Level: MQ300

Product Specification and MSDS for ethyl methyl ketone (Merck).

Description

CAS number: 141-78-6
Linear Formula: CH₃COOC₂H₅
Molecular Weight: 88.11 g/mol
Synonym: Ethyl ethanoate, Acetic ester, Ethyl ester

Description

EMSURE® grade solvents are suitable for a broad spectrum of classical lab applications and are frequently used in regulated and highly demanding lab applications. EMSURE® provides worldwide best and most extensive product specifications. We declare our EMSURE® range to be in compliance with the ACS, with the reagent part of the European Pharmacopoeia (Reag. Ph Eur) and also with the ISO standards.

Product specification and MSDS for Ethyl Acetate (Merck).

Description

HS Code: 3002 12 00
Quality level: MQ100
Coagulase:
– Staphylococcus aureus ATCC 25923 (WDCM 00034): Positive (+)
– Staphylococcus epidermidis ATCC 12228 (WDCM 00036): Negative (-)
– Negative control: Negative (-)

Description

CAS number: 3184-13-2
Linear Formula: C₅H₁₂N₂O₂ * ClH
Molecular Weight: 168.62
Synonym: L(+)-2,5-Diamino valeric acid hydrochloride

Application

L-Ornithine monohydrochloride for biochemistry.

Description

CAS number: 64-17-5
Linear Formula: C₂H₅OH
Molecular Weight 46.07
Synonym: Ethyl alcohol, EtOH

Application

Ethanol for molecular biology.

Description

CAS number: 9005-64-5
Suitability: Suitable for blocking, cell culture, hybridization, protein purification, transformation
Synonym: Polyethylene glycol sorbitan monolaurate, Polyoxyethylenesorbitan monolaurate

General description

Tween^®20 is a polyoxyethylene sorbitol ester that belongs to the polysorbate family. It is a nonionic detergent having a molecular weight of 1,225 daltons, assuming 20 ethylene oxide units, 1 sorbitol, and 1 lauric acid as the primary fatty acid. The ethylene oxide subunits are responsible for the hydrophilic nature of the surfactant, while the hydrocarbon chains provide the hydrophobic environment. Sorbitol forms the backbone ring to which the ethylene oxide polymers are attached.

Application

TWEEN 20 is a non-ionic detergent that has been used in a variety of applications, including:

• Post-hybridization wash buffer after in situ hybridization.
• Used along with PBS (phosphate-buffered saline) as the washing buffer for ELISA and immunostaining.
• Acted as an emulsifying agent for the preparation of stable oil-in-water emulsions
• Used in pre-extraction of membranes to remove peripheral proteins (used at 2% for extraction of membrane-bound proteins).
• Acted as a blocking agent for membrane-based immunoassays at a typical concentration of 0.05%.
• Used for lysing mammalian cells at a concentration of 0.005 to 0.5%.

Description

CAS number: 9005-64-5
Suitability: Suitable for molecular biology
Synonym: Polyethylene glycol sorbitan monolaurate, Polyoxyethylenesorbitan monolaurate

General description

Tween^®20 is a polyoxyethylene sorbitol ester that belongs to the polysorbate family. It is a nonionic detergent having a molecular weight of 1,225 daltons, assuming 20 ethylene oxide units, 1 sorbitol, and 1 lauric acid as the primary fatty acid. The ethylene oxide subunits are responsible for the hydrophilic nature of the surfactant, while the hydrocarbon chains provide the hydrophobic environment. Sorbitol forms the backbone ring to which the ethylene oxide polymers are attached.

Application

TWEEN 20 is a non-ionic detergent that widely used in biochemical applications. It has been used:
• As an emulsifying agent for the preparation of stable oil-in-water emulsions
• In pre-extraction of membranes to remove peripheral proteins (used at 2% for extraction of membrane-bound proteins)
• As a blocking agent for membrane-based immunoassays at a typical concentration of 0.05%
• For lysing mammalian cells at a concentration of 0.005 to 0.5%
• Along with PBS in the dilution of antibodies in immunohistochemistry technique
• For washing cells in FISH (Fluorescence in situ hybridization) technique

Description

CAS number: 9003-39-8
Chemical Formula: (C6H9NO)n
Synonym: PVP, Polyvidone, Povidone

Application

Polyvinylpyrrolidone (PVP), also known as K90 is a water-soluble polymer with good bio-stability. It is chemically stable, has low toxicity and is biocompatible. Hence, it is useful in a variety of applications such as cosmetics, tissue engineering, and biomedical engineering.

Other Notes

Polyvinylpyrrolidone is a component of Denhardt′s Solution and is included at a concentration of 1% (w/v) in the standard 50X stock solution.

Description

CAS number: 77-79-2
Chemical Formula: C4H6O2S
Molar Mass: 118.15 g/mol
Synonyms: 2,5-Dihydrothiophene-1,1-dioxide, 3-Sulfolene

Description

CAS number: 75-09-2
Chemical Formula: CH2Cl2
Molar Mass: 84.93 g/mol
Synonyms: Methylene chloride, methylene chloride

Application

Suitable for HPLC, GC, spectrophotometry, environmental testing and residue analysis.

**This item has been discontinued. Please contact us for more information.

Application

Bond aid for polar to nonpolar substances. Compatibilizer for polymer blends.

Features and Benefits

Contributes abrasion resistance, lubricity, anti-blocking, and surface glass, allows chemical bonding via anhydride group.

General Description

CAS number: 127-19-5
Chemical Formula: CH3CON(CH3)2
Molar Mass: 87.12 g/mol