Cell Signaling Tris Base, Molecular Biology Grade Product Tris Base, Molecular Biology Grade For Research Use Only. Not for Use in Diagnostic Procedures. Description: Tris Base, Molecular Biology Grade, is commonly used for many molecular biology applications. Formula: C4H11NO3. Formula Weight: 121.14. Form: Crystalized free base. Properties: • pH at 25°C of 1M: 10.0–11.5. • Purity: ≥99.9%. • A260 at 1M: ≤0.05. • A280 at 1M: ≤0.05. • Melting Point: 167–172°C. • Moisture: ≤0.2%. • Lead: ≤2ppm. • Magnesium: ≤1ppm. • Calcium: ≤1ppm. • Iron: ≤1ppm. Features: • Quality Tested: Each lot of Tris Base is tested and certified to be free of DNase, RNase and protease activity. Storage Conditions: Store at 22–25°C. Tris-HCl, Molecular Biology Grade (TrisHydrochloride) Product Tris-HCl, Molecular Biology Grade For Research Use Only. Not for Use in Diagnostic Procedures. Description: Tris-HCl, Molecular Biology Grade, is sometimes used in combination with Tris base for preparation of Tris-HCl buffers. Formula Weight: 157.56. Properties: • pH at 25°C (0.1M): 4.2–5.0. • Purity: ≥99.0%. • A240 at 1M: ≤0.06. • A260, A280, A300, A600 at 1M: ≤0.05. • Melting Point: 150–152°C. • Moisture: ≤0.5%. • Calcium: ≤5ppm. • Iron: ≤5ppm. • Lead: ≤1ppm. • Magnesium: ≤1ppm. • Manganese: ≤1ppm. • Copper: ≤1ppm. • Zinc: ≤1ppm. Features: • Quality Tested: Each lot of Tris-HCl is tested and certified to be free of DNase, RNase and protease activity. Storage Conditions: Store at 22–25°C. Size Cat.# Price (Fr) 100 g H5121 55.00 500 g H5123 207.00 2,500 g H5125 725.00 Size Cat.# Price (Fr) 100 g H5133 34.00 500 g H5131 85.00 2,500 g H5135 319.00 Triton® X-100, Molecular Biology Grade Product Triton® X-100, Molecular Biology Grade For Research Use Only. Not for Use in Diagnostic Procedures. Description: Triton® X-100, Molecular Biology Grade, is a widely used nonionic surfactant. Properties: • Moisture: ≤1.0%. • Lead: ≤5ppm. • Iron: ≤5ppm. • Density at 25°C: 1.0645–1.0655g/ml. Features: • Quality Tested: Each lot of Triton® X-100 is tested and certified to be free of DNase, RNase and protease activity. Storage Conditions: Store at 22–25°C. Tween® 20, Molecular Biology Grade Product Tween® 20, Molecular Biology Grade For Research Use Only. Not for Use in Diagnostic Procedures. Description: Tween® 20, Molecular Biology Grade, is a nonionic detergent used for many different molecular biology applications. Properties: • Appearance: Clear, yellow, viscous liquid. • Hydroxyl Number: 96–108. • Lead: ≤10ppm. Features: • Quality Tested: Each lot of Tween® 20 is tested and certified to be free of DNase, RNase and protease activity. Storage Conditions: Store at 22–25°C. Urea Product Urea For Research Use Only. Not for Use in Diagnostic Procedures. Description: Urea is a protein denaturant. Urea is qualified for use as the denaturing component in polyacrylamide gels. Formula: (NH2)2CO. Formula Weight: 60.06. Form: Fine, white, free-flowing pastilles. Properties: • Purity: ≥99.0%. • Melting Point: 132–135°C. • A280 at 8M in water: ≤0.10. • Chloride: ≤0.0005%. • Heavy Metals: ≤0.001%. • Iron: ≤0.001%. • Cyanate: none detected. Storage Conditions: Store at 22–25°C. Protect from moisture. Size Cat.# Price (Fr) 1 kg V3171 98.00 5 kg V3175 356.00 Size Cat.# Price (Fr) 100 ml H5152 48.00 500 ml H5151 120.00 Size Cat.# Price (Fr) 100 ml H5142 41.00 500 ml H5141 154.00 1 For complete and up-to-date product information visit: www.promega.com/catalog 11 Biochemicals and Labware Pagina 14
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