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Bioxys

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Biological Buffers  
Product Synonym CAS # Specification Prices
Bis-Tris Propane 1,3-Bis[tris(hydroxymethyl)methylamino]propane 64431-96-5 Purity(HPLC): 98.0% min; Insoluble matter: 0.01% max; Identification:        IR matches reference; Solubility,10% solution in H2O:clear and complete; Heavy metals: 5ppm max; Loss on Drying: 0.8% max; Residue on Ignition: 0.1% max; Melting point: 162.0-165.0°C; PH(0.5% agueous): 10.4-11; UV/280nm(1% aqueous): 0.15max;Appearance of solution(1mol/L,water): clear and colorless;Tris Residue:1.0% max; Appearance:White crystalline powder 160,00 €
HEPES 4-(2-Hydroxyethyl)piperazine-1-ethanesulfonic acid 7365-45-9 Assay(C8H18N2O4S)(potertiometric cal on dry substance):99.5% min; Solubility(1mol/L,water): clear; Loss on drying(105°C,3 hours): 1.0%max; UV Absorbance(260nm,1mol/L,1cm):0.05max; Fe:0.0005%max; Sulfate:0.05%max; Heavy metals(as Pb):0.001%max; Residue on Ignition:0.1%max; pKa at 20°C:7.35-7.69; Appearance: White crystalline powder 62,50 €
HEPES-Na 4-(2-Hydroxyethyl)piperazine-1-ethanesulfonic acid,Sodium salt 75277-39-3 Assay(C8H18N2O4S):98.0%min; Color(1% solution): Passes test; PH ( 1%, at 25°C):9.4-11.0; Heavy metals(as Pb):0.0005% max;  Loss on drying(110°C,3 hours):3.0% max; pKa at 25°C: 7.4-7.7; Sulfate: 0.02% max; UV Absorbance(260nm, 1M/L,1cm): 0.5 max; Appearance:White crystalline powder 70,30 €
MES 2-(N-Morpholino)ethanesulfonic acid monohydrate 145224-94-8 Assay: 99.0%min; Color of 1M Solution: Clear; Loss on Drying(110°C,    3 hours): 7-10%; Heavy Metals(as Pb): 10ppm max; Fe: 10ppm max; Chloride: 100ppm max; Sulfate: 100ppm max;  PH (1%): 2.5-4.5;          UV Absorbance (260nm,0.1M): 0.05 max;  UV Absorbance (280nm,0.1M): 0.05 max;  Appearance:White crystalline powder 61,20 €
MES-Na 2-(N-Morpholino)ethanesulfonic acid sodium salt 71119-23-8 Assay(by titration,0.1 N NAOH): 99.0% min; Infrared:Confirm to the reference; Solubility(0.1M aqueous): Clear and Colorless;                      Loss on Drying(by Karl fischer): 11% max; Heavy Metals: 5ppm max; PH(1% aqueous): 8.9-10.1; UV Absorbance(260nm, 1M/L,1cm):       0.05 max; UV Absorbance(280nm, 1M/L,1cm): 0.03 max;       Appearance: White crystalline powder 67,05 €
MOPS 3-(4-Morpholino)propanesulfonic acid 1132-61-2 Assay(C7H15NO4S)(dried basis):99.0%min; PH of 1% Solution at        25°C:2.5-4.5;  Heavy metals(as Pb):5ppm max; Fe: 5ppm max; Loss on drying(105°C):1.0% max; pKa at 20°C:7.08-7.28; Solution(10%) in water: Passes test; UV Absorbance of a 0.1M Solution(1-cm path vs water) at 260nm: 0.02 max; Appearance: White crystalline powder 67,70 €
MOPS-Na 3-(4-Morpholino)propanesulfonic acid sodium salt 71119-22-7 Assay(by titration): 98.0% min; Solution(10%) in water: Clear;              pKa at 20°C: 7.20; Heavy Metals: 1ppm max; PH(1% aqueous): 6.5-8.0; UV Absorbance(260nm, 1M/L,1cm): 0.05 max; Appearance: White solid 69,65 €
PIPES Piperazine-N,N′-bis(2-ethanesulfonic acid) 5625-37-6 Assay: 99.0% min; Heavy Metals: 5ppm max; Insolubles:0.05% max;    pKa at 20°C: 6.7-6.9; Sulphate(SO4): 0.01%max; Iron(Fe): 0.0005% max; Ph 0.1%aq.ash: 2.5-3.0; Sulphated ash: 0.2% max; A 10% in 10%NaOH,250nm: 0.2max; Solubility(5% 1.0 N NaOH): clear, colorless solution; Appearance: White crystalline powder 65,10 €
PIPES-1.5Na Piperazine-N,N′-bis(2-ethanesulfonic acid),sesquisodium salt 100037-69-2 Assay(by titration)(Reverse with 0.1N N2SO4):96.5% min;                    PH ( 1.0% aq.): 6.5-7.1; Heavy metals:5ppm max;  Loss on drying:     4.0% max;  Solubility (10% aq.): Clear,colorless solution; UV Absorbance (260nm,10% aq.): 0.05 max;  UV Absorbance (280nm,10% aq.):        0.05 max; Appearance: White crystalline powder 69,65 €
Tris Tris(hydroxymethyl)aminomethane  77-86-1 Assay:99.9-101%; Melting point: 168-172°C; Moisture: 0.2%max;   Clarity of solution(40% in H2O): Clear;  PH 5.0%: 10.0-11.5;              Fe+: 1ppm max; Ignition residue: 0.1% max; Absorbency (40% in H2O): 0.05 max(280nm),0.2 max(290nm);Indissoluble in water: 0.005% max; Nickel(Ni): 5ppm max; Organic Volatile Purities:Not detected; Appearance: White crystalline powder 41,44 €
Tris HCL Tris(hydroxymethyl)aminomethane hydrochloride 1185-53-1 Assay: 99.5% min; Appearance: White Crystalline powder; Solubility(1.0M aqueous): Clear, colorless solution; Melting Point: 149 - 153°C; Infrafed:Must conform to known reference; Water content( by Karl Fischer): 0.5% max; PH ( 1.0% aqueous): 4.2 - 5.0; Ultraviolet Absorbance A (260nm)(1.0M aqueous): 0.06 Abs unit max; Ultraviolet Absorbance A (280nm)(1.0M aqueous): 0.05 Abs unit max; Loss on drying: 0.5% max; Heavy metal: 5ppm max; Fe: 5ppm max 45,34 €

 

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Last modified: 05/29/09