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				Molecular Biology Reagents/Chemicals
MIDSCI™ gives you ultra-pure, cost-competitive molecular biology reagents and lab chemicals for life science research; often with significant cost savings over Sigma Aldrich and other lab reagent providers.
PR1MA™ Chemicals can help with a wide variety of research-based requirements.
 
Use our glycerol for polyacrylamide gel electrophoresis. Eliminate Agrobacterium after inoculation with the carbenicillin we carry. Or detect β-Galactosidase activity with X-GAL which, when combined with the IPTG we stock, can be used to detect lac gene expression in cloning applications.
 
We also carry Luria Broth (Lennox), for the propagation and maintenance of E. coli; DTT, in order to maintain –SH groups in a reduced state; and high gel strength agar for tissue culture and microbiological work.
PR1MA™ Nourseothricin Sulfate [NTC] [clonNAT] [Streptothricin Sulfate]
    Common Name: [NTC] [clonNAT] [Streptothricin Sulfate]
CAS Number: 96736-11-7
Solubility: Water
Storage Temp: 2-8°C
Dihydrogen sulfate form of the weekly basic antibiotic Nourseothricin consisting of components F, E and D. Effective against gram negative and gram positive bacteria. Also effective against mycobacteria, mycoplasms, protozoa, yeasts, viruses and plants. Commonly used as a selection agent for recombinant yeast strains.
    Research or further manufacturing use only, not for food or drug use.
- Appearance: White Powder
 - Carbon (C): Report %
 - Hydrogen (H): Report %
 - Nitrogen (N): Report %
 - Purity (HPLC): ≥ 85 %
 - Sulfur (S): Report %
 
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PR1MA™  Bacitracin
    CAS Number: 1405-87-4
Molecular Weight: 1422.69
Chemical Formula: C66H103N17O16
    S
Solubility: Water, Ethanol, and Methanol
Storage Temp: 2-8°C
    Interferes with bacterial cell wall synthesis. Active against gram positive
    bacteria. Toxic to plant cells.
    Research or further manufacturing use only, not for food or drug use.
- Appearance: White to pale buff powder
 - Identification: Pass test
 - pH: 5.5 - 7.5
 - Loss on Drying: ≤ 5.0 %
 - Residue on Ignition: ≤ 0.5 %
 - Bacitracin A: ≥ 40.0 %
 - SUM of bacitracin A, B1, B2 and B3: ≥ 70.0 %
 - Limit of early eluting peptides: ≤ 20.0 %
 - Limit of Bacitracin F: ≤ 6.0 %
 - Microbial Assay (Dried Basis): ≥ 65.0 IU / mg
 - Heavy Metals : ≤ 30 ppm
 - Total Viable Aerobic Count: ≤ 100 CFU/g
 - Particle Size (< 20 µm by volume): ≥ 99.0 %
 - Crystallinity : Pass
 - Appearance of Solution: Clear, colorless to slight hazy yellow
 - Source: Bacillus Licheniformis
 - Non Animal Origin: Non Animal Origin
 - Grade: USP
 - Country of Origin : Report
 
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PR1MA™ bis-TRIS [bis-(2-hydroxyethyl)aminotris(hydroxymethyl)methane]
Common Name: bis(2-Hydroxyethyl)aminotris (hydroxymethyl)methane
CAS Number: 6976-37-0
Molecular Weight: 209.2
Chemical Formula: C8H19NO5
Solubility: Water
Storage Temp: Room Temperature
Research or further manufacturing use only, not for food or drug use.
- Appearance: White crystalline powder
 - Assay: ≥ 99.0 %
 - Identification (IR): Matches reference
 - Melting Point: Report oC
 - pH, 1.0M Aqueous solution @25ºC: 9.5 - 11.0
 - pKa @ 20°C: 6.0 - 7.0
 - Solubility: Complete and clear
 - UV Absorbance @280nm, 1.0 M in H2O: ≤ 0.40
 
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PR1MA™ Citric Acid Anhydrous
    CAS Number: 77-92-9
Molecular Weight: 192.1
Chemical Formula: C6H8O7
Solubility: Water
Storage Temp: Room Temperature
Research or further manufacturing use only, not for food or drug use.
- Appearance: Fine white crystalline powder
 - Assay (Titration): ≥ 99.5 %
 - Carbonizable Substances (H2SO4): Pass Test
 - Clarity and Color: Pass Test
 - Identification: Pass Test
 - Lead : ≤ 0.5 mg/kg
 - Limit of Oxalic Acid: ≤ 0.036 %
 - Oxalate Test: Pass Test
 - Residual Solvents: Meet requirements
 - Residue on Ignition: ≤ 0.05 %
 - Sulfate: ≤ 0.015 %
 - Water: ≤ 0.5 %
 
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PR1MA™ Colistin Sulfate
    CAS Number: 1264-72-8
Molecular Weight: 2801.27
Chemical Formula: (C52H98N16O13
    )2 • 5(H2SO4)
Solubility: Water
Storage Temp: Short Term: 2-8°C; Long Term: -20°C
    Active against gram negative bacteria. Potency approximately 20,000 units
    per milligram.
    Research or further manufacturing use only, not for food or drug use.
- Appearance: White or almost white powder
 - Arsenic (As): ≤ 2 ppm
 - Heavy Metals : ≤ 20 ppm
 - Identification: Conforms
 - Loss on Drying: ≤ 3.5 %
 - pH (1% in H2O): 4.0 - 6.0
 - Potency (Dried basis): ≥ 19000 µg/mg
 - Solubility (50mg/ml in H2O): Clear and light yellow solution
 - Specific Rotation: -73 - -63 °
 - Sulfate: 16.0 - 18.0 %
 - Sulfated Ash: ≤ 1.0 %
 
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PR1MA™ Polymixin B Sulfate
    CAS Number: 1405-20-5
Molecular Weight: 1385.61
Chemical Formula: C55H96N16O13 • 2H2SO4
Solubility: Water
Storage Temp: 2-8°C
    Mixture of sulfates of polypeptides from certain strains of Bacillus
    polymixa. Active against gram negative bacteria.
    
    Research or further manufacturing use only, not for food or drug use.
- Appearance: White to Light Yellow Powder
 - Identification: Pass Test
 - pH (0.5% Solution): 5.0 - 7.5
 - Loss on Drying: ≤ 7.0 %
 - Single Impurity: ≤ 3.0 %
 - Total impurities: ≤ 17.0 %
 - Bacteria Colonies: ≤ 10/g
 - Ecoli Colonies: Should not be found
 - Fungi and Yeast colonies: ≤ 10/g
 - Assay, HPLC (on dried basis) (Sum of polymxin B1,B2, B3 and B1-1): ≥ 80.0 %
 - Assay, HPLC (on dried basis) (Polymyxin B3): ≤ 6.0 %
 - Assay, HPLC (on dried basis) (Polymyxin B1-1): ≤ 15.0 %
 - Assay (Dried Basis): ≥ 6000 U/mg
 - Assay (Wet Basis): Report U/mg
 - Non Animal Origin: Non Animal Origin
 - Grade: USP
 - Country of Origin: Report
 
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PR1MA™ Spectinomycin Dihydrochloride Pentahydrate
    CAS Number: 22189-32-8
Molecular Weight: 495.3
Chemical Formula: C14H24N2O7 • 2HCl • 5H2O
Solubility: Water
Storage Temp: 2-8°C
    Aminocyclitol antibiotic that inhibits protein synthesis. Cell culture
    tested.
    
    Research or further manufacturing use only, not for food or drug use.
- Appearance: White or almost white, Slightly hygroscopic powder
 - Identification: Pass Test
 - pH @25 °C: 3.8 - 5.6
 - Potency : ≥ 603 IU/mg
 - Residue after Ignition: ≤ 1.0 %
 - Solubility: Clear and colorless to light yellow
 - Specific Rotation: +15 - +21 °
 - Water (KF): 16.0 - 20.0 %
 
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PR1MA™ Mitomycin C
CAS Number: 50-07-7
Molecular Weight: 334.3
Chemical Formula: C15H18N4O5
Solubility: Ethanol
Storage Temp: 2-8°C 
Antineoplastic antibiotic that acts as an alkylating agent after activation and also suppresses the synthesis of nucleic acids. A cell-cylce non specific agent, most active in the late G1 and early S phases.
WARNING! This product can expose you to Mitomycin-C, a chemical which is known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov.
Research or further manufacturing use only, not for food or drug use.
- Appearance: Blue violet solid
 - Identification (UV): Conforms
 - Purity-HPLC (RP CH3CN:H2O-0-100%): ≥ 99.0 %
 - Purity-HPLC (RP MEOH:H2O-90-10): ≥ 98.0 %
 - Purity-TLC (CH2CL2:MEOH- 9:1): ≥ 98.0 %
 - Solubility (10 mg/ml MEOH): Clear Blue Solution
 
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PR1MA™ HEPES, Free Acid [N-(2-Hydroxyethyl) piperazine N'-(2-ethanesulfonic acid)]
    Common Name: [N-(2-Hydroxyethyl) piperazine N'-(2-ethanesulfonic acid)]
CAS Number: 7365-45-9
Molecular Weight: 238.3
Chemical Formula: C8H18N2O4S
Solubility: Water
Storage Temp: Room Temperature
    Zwitterionic N-substituted aminosulfonic acid buffer.
- pka (25°C): 7.5
 - pH Range (Working): 6.8 - 8.2
 - Heavy Metals: <0.001% Max
 
- Appearance: White Crystalline Powder
 - Assay (Titration, dried basis): ≥ 99.5 %
 - DNase, RNase, protease: Not Detected
 - Endotoxin (0.2% Solution): ≤ 0.25 EU/ml
 - Heavy Metals (as Pb): ≤ 0.001 %
 - Identification (IR): Pass
 - Iron (Fe): ≤ 0.0005 %
 - Loss on Drying: ≤ 1.0 %
 - pH (5% in water): 5.0 - 6.5
 - pKa @ 20°C: 7.35 - 7.70
 - Residue on Ignition: ≤ 0.1 %
 - Solubility (1M Solution in Water ): Clear and Colorless Solution
 - Sulfate: ≤ 0.05 %
 - UV Absorbance (1M@260nm): ≤ 0.05
 - UV Absorbance (1M@280nm): ≤ 0.05
 
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PR1MA™ Puromycin Dihydrochloride
CAS Number: 58-58-2
Molecular Weight: 544.43
Chemical Formula: C22H29N7O5 • 2HCl
Solubility: Water
Storage Temp: -20°C
Amino nucleoside antibiotic allows the selection of cells expressing the pac gene. Inhibits the growth of gram-positive bacteria and various animal and insect cells.
Research or further manufacturing use only, not for food or drug use.
- Appearance: White to Off White Powder
 - Identification (TLC): Conforms
 - Melting Point: 168 - 182 oC
 - Purity (HPLC): ≥ 98.0 %
 - Solubility: Clear, colorless or light yellow solution
 - Water (KF): ≤ 12.0 %
 
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PR1MA™ Blasticidin S Hydrochloride Powder
    CAS Number: 3513-03-9
Molecular Weight: 458.9
Chemical Formula: C17H26N8O5 • HCl
Solubility: Water
Storage Temp: -20°C
Research or further manufacturing use only, not for food or drug use.
- Appearance: White Powder
 - Endotoxin : ≤ 1.0 EU / mg
 - Identification: Pass Test
 - Potency: ≥ 850 ug / mg
 - Purity (HPLC): ≥ 98.0 %
 - Solubility: Clear, Slightly yellow solution at 5 mg / mL in water
 
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PR1MA™ Tris Base Ultra Pure [Tris (Hydroxymethyl) Aminomethane]
    Common Name: Tris (Hydroxymethyl) Aminomethane
CAS Number: 77-86-1
Molecular Weight: 121.1
Chemical Formula: C4H11NO3
Solubility: Water
Storage Temp: Room Temperature
Highly purified for use in molecular biology applications.
    Moisture:
    <0.2%
    
    Color:
    <20 APHA (colorless)
    
    Heavy Metals (as Pb):
    <0.0001%
    
    Insoluble Matter:
    <0.005%
    
    Heavy Metals:
    5 ppm
    
    pKa (20°C):
    8.1 ± 0.1
    Research or further manufacturing use only, not for food or drug use.
- Appearance: White Crystalline Powder
 - Purity (Dried Basis By GC): ≥ 99.9 %
 - Related Substances By GC: ≤ 0.1 %
 - Water: ≤ 0.2 %
 - Loss on Drying @ 105 oC, 3hrs: ≤ 1.0 %
 - Melting Point: 170 - 172 oC
 - APHA Color, 20% Aqueous solution: ≤ 20
 - Insoluble Matter: ≤ 0.005 %
 - Heavy Metals (as Pb): ≤ 5 ppm
 - Residue on Ignition: ≤ 0.5 %
 - Iron (Fe): ≤ 5 ppm
 - UV Absorbance @260nm, 10% Aqueous solution : ≤ 0.03
 - UV Absorbance @280nm, 10% Aqueous solution : ≤ 0.02
 - UV Absorbance @290nm, 40% solution in H2O: ≤ 0.20
 - UV Absorbance @430nm, 10% Aqueous solution : ≤ 0.004
 - Identification A: Pass
 - Identification B: Pass
 - Identification C: Pass
 - pH (5% in water): 10.0 - 11.5
 - Arsenic (As): ≤ 1 ppm
 - Chloride: ≤ 100 ppm
 - Copper (Cu): ≤ 1 ppm
 - DNase, RNase, protease: None Detected
 - Lead: ≤ 1 ppm
 - Magnesium (Mg): ≤ 1 ppm
 - pH (1M in H2O): 10.5 - 11.5
 - Residual Solvents: Conforms to USP/EP
 - Residue on Ignition (USP): ≤ 0.1 %
 - Solubility (2M In H2O): Pass