This category covers everyday reagents for molecular and cell biology work. It includes buffers and buffer components such as Tris base, MOPS, CAPS, Bicine, glycine, 0.5 M EDTA solution at pH 8.0 and PBS tablets; detergents including Triton X-100, Tween 20, Tween 80, CHAPS and sodium deoxycholate; bovine serum albumin as Fraction V powder and 20 mg/ml solution; polymers like PEG 1000, PEG 8000 and Ficoll 400; and DNase- and RNase-free molecular biology grade water, along with enzymes, cofactors and amino acids. Pack sizes run from milligrams to kilograms and from milliliters to multi-liter containers.

Check the grade first: molecular biology grade material is tested for nucleases, while ultra pure and reagent grades are defined by each manufacturer's specification. Then compare purity, form (powder, solution or tablet), pack size against how fast you use the material, and storage conditions. Review the SDS before use and request a Certificate of Analysis when you need lot-level records.

Molecular Biology Reagents: common questions

What are life science or biological reagents?

Biological or life science reagents are the chemicals and biological materials used to prepare, grow, separate or analyze cells, proteins and nucleic acids. Examples include buffers, detergents, salts, proteins such as BSA, enzymes, nucleotides and cofactors, and specially purified water. They are graded by purity and testing, which determines whether they suit routine work or sensitive applications.

What does molecular biology grade mean?

Molecular biology grade generally means the material has been tested for, and found free of detectable, DNase, RNase and often protease activity, so it will not degrade DNA, RNA or proteins in your samples. The exact tests vary by manufacturer, so check the specification sheet or Certificate of Analysis for what was tested and the limits used.

What is a lyophilized reagent?

A lyophilized reagent has been freeze-dried: frozen, then dried under vacuum so the water sublimes. The dry product is usually more stable in storage and shipping than a liquid. Before use it is reconstituted with the volume and type of liquid the manufacturer specifies. After reconstitution, follow the stated storage conditions and shelf life.

Can I get pricing for bulk quantities of reagents?

Yes. Volume and quote pricing is available through the Contact Us page, and approved business accounts can pay by purchase order. Chemicals ship only to business addresses, with a company name required at checkout. Many items ship directly from the manufacturer, so lead times vary by item.

Molecular Biology Reagents

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  1. CHES, 2-, N-Cyclohexylamino, ethanesulfonic acid, 1 Kilogram CAS# 103-47-9
    Manufacturer: Research Products International
    Purity: >99% pKa (25°C): 9.3-9.7 pH Range: 8.6-10.0 Soluble in: Water Store at: Room Temperature Product usually ships within 24 hours. This product is sold for laboratory research use only. Mol. Wt:207.3 Common Name: 2-(N-Cyclohexylamino)ethanesulfonic a (1 per EA)
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    $587.65
  2. STET Buffer 1X Solution, Sodium Chloride-TRIS-EDTA-Triton, 500 Milliliters
    Manufacturer: Research Products International
    Mol. Wt: Common Name: Sodium Chloride-TRIS-EDTA-Triton Formula: Dimensions: 3.50 x 8.50 x 3.50 Weight: 2.4 - Research or further manufacturing use only, not for food or drug use. (1 per EA)
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    $46.00
  3. Tris(hydroxymethyl)aminomethan, 500.00 g wide mouth
    Manufacturer: Reagents Inc
    Tris(hydroxymethyl)aminomethan, 500.00 g wide mouth (1 per EA )
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    was $88.00 Special Price $64.05
  4. L-TYROSINE, 1 KILOGRAM CAS# 60-18-4
    Manufacturer: Research Products International
    Mol. Wt:181.2 Common Name: Formula: C9H11NO3 Dimensions: 8.13 x 7.25 x 8.13, Weight: 2.9, Cas#: 60-18-4 Research or further manufacturing use only, not for food or drug use. (1 per EA)
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    $268.45
  5. Cytosine, 500 Grams CAS# 71-30-7
    Manufacturer: Research Products International
    Purity: >99% Soluble in: 0.5M HCl Store at: Room Temperature Product usually ships within 24 hours. This product is sold for laboratory research use only. Mol. Wt:111.1 Common Name: Formula: C4H5N3O Dimensions: 3.50 x 7.00 x 3.50, Weight: 1.23, Cas#: 71- (1 per EA)
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    $2,493.35
  6. Imidazole, Glyoxaline, 1,3-Diaza-2-,4-cyclopentadiene, 100 Grams CAS# 288-32-4
    Manufacturer: Research Products International
    Mol. Wt:68.1 Common Name: [Glyoxaline] [1,3-Diaza-2,4-cyclopentadiene] Formula: C3H4N2 Dimensions: 3.50 x 3.75 x 3.50, Weight: 0.34, Cas#: 288-32-4 Research or further manufacturing use only, not for food or drug use. (1 per EA)
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    $132.80
  7. Imidazole, Glyoxaline, 1,3-Diaza-2-,4-cyclopentadiene, 500 Grams CAS# 288-32-4
    Manufacturer: Research Products International
    Mol. Wt:68.1 Common Name: [Glyoxaline] [1,3-Diaza-2,4-cyclopentadiene] Formula: C3H4N2 Dimensions: 3.50 x 3.75 x 3.50, Weight: 1.2, Cas#: 288-32-4 Research or further manufacturing use only, not for food or drug use. (1 per EA)
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    $363.80
  8. DTT, DL-Dithiothreitol, , Cleland's Reagent, , 50 Grams CAS# 3483-12-3
    Manufacturer: Research Products International
    Mol. Wt:154.25 Common Name: [DL-Dithiothreitol] (Cleland's Reagent)] Formula: C4H10O2S2 Dimensions: 2.00 x 3.88 x 2.00, Weight: 0.39, Cas#: 3483-12-3 Research or further manufacturing use only, not for food or drug use. (1 per EA)
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    $435.00
  9. Tween 20, Polyoxyethylenesorbitan Monolaurate, 1 Liter CAS# 9005-64-5
    Manufacturer: Research Products International
    Mol. Wt: Common Name: Polyoxyethylenesorbitan Monolaurate Formula: Dimensions: 3.50 x 8.50 x 3.50, Weight: 2.4, Cas#: 9005-64-5 Research or further manufacturing use only, not for food or drug use. (1 per EA)
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    $64.15
  10. Guanidine Hydrochloride, 500 Grams CAS# 50-01-1
    Manufacturer: Research Products International
    Purity:>99% Toxicity: LD50 > 500mg/kg. Soluble in water Store at room temperature Cas No.?50-01-1 Usually ships within 24 hours. This product is sold for laboratory research use only. Mol. Wt:95.5 Common Name: Formula: CH5N3-HCl Dimensions: 3.50 x 7 (1 per EA)
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    $189.85
  11. HEPES, Sodium Salt, N-, 2-Hydroxyethyl, piperazine-N'-, 2-ethanesulfonic acid, , 500 Grams CAS# 75277-39-3
    Manufacturer: Research Products International
    Mol. Wt:260.3 Common Name: N-(2-Hydroxyethyl)piperazine-N'-(2-ethanesulfonic acid) Formula: C8H17N2O4SNa Dimensions: 3.50 x 7.00 x 3.50, Weight: 1.24, Cas#: 75277-39-3 Research or further manufacturing use only, not for food or drug use. (1 per EA)
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    $324.05
  12. CHES, 2-, N-Cyclohexylamino, ethanesulfonic acid, 500 Grams CAS# 103-47-9
    Manufacturer: Research Products International
    Purity: >99% pKa (25°C): 9.3-9.7 pH Range: 8.6-10.0 Soluble in: Water Store at: Room Temperature Product usually ships within 24 hours. This product is sold for laboratory research use only. Mol. Wt:207.3 Common Name: 2-(N-Cyclohexylamino)ethanesulfonic a (1 per EA)
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    $329.15
  13. Magnesium Sulfate Heptahydrate, 5 Kilograms CAS# 10034-99-8
    Manufacturer: Research Products International
    Mol. Wt:246.5 Common Name: Formula: MgSO4 - 7H2O Dimensions: 10.00 x 11.25 x 10.00, Weight: 12.7, Cas#: 10034-99-8 Research or further manufacturing use only, not for food or drug use. (1 per EA)
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    $328.60
  14. HEPPS, N-, 2-Hydroxyethyl, piperazine-N'-, 3-propane sulfonic acid, , EPPS, 1 Kilogram CAS# 5169070
    Manufacturer: Research Products International
    Mol. Wt:252.3 Common Name: HEPPS [N-(2-Hydroxyethyl)piperazine-N'-(3-propane sulfonic acid)] [EPPS] Formula: C9H20N2O4S Dimensions: 8.13 x 7.25 x 8.13, Weight: 2.69, Cas#: 5169070 Research or further manufacturing use only, not for food or drug use. (1 per EA)
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    $994.00
  15. Guanidine Thiocyanate, 500 Grams CAS# 593-84-0
    Manufacturer: Research Products International
    Mol. Wt:118.2 Common Name: Formula: CH5N3 - HSCN Dimensions: 3.50 x 7.00 x 3.50, Weight: 1.24, Cas#: 593-84-0 Research or further manufacturing use only, not for food or drug use. (1 per EA)
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    $246.90
  16. n-PROPYL 4-HYDROXYBENZOATE, 1 KILOGRAM CAS# 94-13-3
    Manufacturer: Research Products International
    Usually ships within 24 hours. This product is sold for laboratory use only. Mol. Wt:180.2 Common Name: 4-Hydroxybenzoic acid propyl ester Formula: C10H12O3 Dimensions: 4.88 x 7.25 x 4.88, Weight: 2.4, Cas#: 94-13-3 Research or further manufacturing use (1 per EA)
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    $387.35
  17. L-Asparagine, Anhydrous, 5 Kilograms CAS# 70-47-3
    Manufacturer: Research Products International
    Mol. Wt:132.1 Common Name: Formula: C4H8N2O3 Dimensions: 10.00 x 7.50 x 10.00, Weight: 12.25, Cas#: 70-47-3 Research or further manufacturing use only, not for food or drug use. (1 per EA)
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    $1,097.00
  18. Picloram , 4-Amino-3,5,6-Trichloropicolinic Acid, , 5 Grams CAS# 1918-02-1
    Manufacturer: Research Products International
    Mol. Wt:241.5 Common Name: 4-Amino-3,5,6-Trichloropicolinic Acid Formula: C6H3Cl3N2O2 Dimensions: 3.38 x 4.63 x 3.38, Weight: 0.13, Cas#: 1918-02-01 Research or further manufacturing use only, not for food or drug use. (1 per EA)
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    $83.45
  19. MES Sodium Salt [2-(N-Morpholino)ethanesulfonic acid] sodium salt, 3 Kilograms CAS# 71119-23-8
    Manufacturer: Research Products International
    Mol. Wt:217.22 Common Name: [2-(N-Morpholino)ethanesulfonic acid] sodium salt] Formula: C6H12NNaO4S Dimensions: 8.13 x 7.25 x 8.13, Weight: 7.2, Cas#: 71119-23-8 Research or further manufacturing use only, not for food or drug use. (1 per EA)
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    $2,050.10
  20. Thidiazuron, 250 MG CAS# 51707-55-2
    Manufacturer: Research Products International
    Mol. Wt:220.25 Common Name: 1-Phenyl-3-(1,2,3,-thiadiazol-5-yl)urea Formula: C9H8N4OS Dimensions: 3.38 x 4.63 x 3.38, Weight: 0.11, Cas#: 51707-55-2 Research or further manufacturing use only, not for food or drug use. (1 per EA)
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    $535.20
  21. D-Melibiose Monohydrate, 1 Gram CAS# 585-99-9
    Manufacturer: Research Products International
    Product usually ships within 24 hours. This product is sold for laboratory research use only. Mol. Wt:360.31 Common Name: Formula: C12H22O11-H2O Dimensions: 1.25 x 1.75 x 1.25, Weight: 0.03, Cas#: 585-99-9 Research or further manufacturing use only, not (1 per EA)
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    $30.65
  22. Potassium Phosphate, Dibasic, 12 Kilogram CAS# 7758-11-4
    Manufacturer: Research Products International
    Mol. Wt:174.2 Common Name: Formula: K2HPO4 Dimensions: 10.00 x 11.25 x 10.00, Weight: 28.12, Cas#: 7758-11-4 Research or further manufacturing use only, not for food or drug use. (1 per EA)
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    $959.65
  23. Thymine, 100 Grams CAS# 65-71-4
    Manufacturer: Research Products International
    Mol. Wt:126.11 Common Name: Formula: C5H6N2O2 Dimensions: 3.50 x 3.75 x 3.50, Weight: 0.38, Cas#: 65-71-4 Research or further manufacturing use only, not for food or drug use. (1 per EA)
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    $292.85
  24. Chlorsulfuron, 100 MG CAS# 64902-72-3
    Manufacturer: Research Products International
    Purity: >95% Soluble in: Water Store at: Room Temperature Product usually ships within 24 hours. This product is sold for laboratory research use only. Mol. Wt:357.8 Common Name: Formula: C12H12CIN5O4S Dimensions: 1.25 x 1.75 x 1.25, Weight: 0.03, Cas#: (1 per EA)
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    $524.40
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