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Biological Buffers |
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Product |
Synonym |
CAS # |
Specification |
Prices |
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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 € |
+32 1658 9045
+32 1650 9045
