Grade guide
Molecular Biology Grade chemicals
Reagents tested for absence of DNase, RNase and protease activity and low contaminants, for PCR, cloning, sequencing and nucleic-acid work.
199 Molecular Biology Grade products
Hydrochloric acid, 2.0 M in diethyl ether, for molecular biology 36.5%
- CAS
- 7647-01-0
- Formula
- ClH
- MW
- 36.46 g/mol
VQ-045562
Hygromycin B, from Streptomyces hygroscopicus, for molecular biology ≥60.00%
- CAS
- 31282-04-9
- Formula
- C20H37N3O13
- MW
- 527.5 g/mol
VQ-046892
Ion Exchange Resin 20-50 Mesh, for spectroscopy, for molecular biology
- CAS
- 9002-24-8
- Formula
- C190H178N22OS3
- MW
- 2882 g/mol
VQ-046933
L-Histidine monohydrochloride, for molecular biology, 99%
- CAS
- 5934-29-2
- Formula
- C6H12ClN3O3
- MW
- 209.63 g/mol
VQ-002888
FAQs
Is molecular biology grade sterile?
Not necessarily. It is tested for nuclease and protease activity. Sterility and endotoxin levels are separate specifications and are stated only where tested.
Can I use AR grade Tris for PCR?
It may work, but it has not been tested for nuclease activity or PCR inhibitors. Molecular biology grade reduces that risk, particularly for RNA work.
How is RNase activity tested?
Typically by incubating a solution of the reagent with an RNA substrate and checking for degradation by electrophoresis or fluorescence.
Other grades
HPLC GradeGC GradeAR Grade (Analytical Reagent)ACS GradeLR Grade (Laboratory Reagent)Extra Pure GradeSpectroscopy GradeLC-MS GradeIP Grade (Indian Pharmacopoeia)BP Grade (British Pharmacopoeia)USP Grade (United States Pharmacopeia)Ph. Eur. Grade (European Pharmacopoeia)Food Grade (FCC)Technical GradeElectronic GradeDeuterated & Stable-Isotope-Labelled CompoundsPharmaceutical Secondary Reference Standards
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