391338-100GM

General description

Absorbance (1.0 M, H₂O, 260 nm):≤0.05.r>Absorbance (1.0 M, H₂O, 280 nm): ≤0.04

A zwitterionic N-substituted aminosulfonic acid buffer. HEPES has its maximum buffering capacity very near the pH of mammalian tissue fluids (pK_a of 7.31 at 37°C). Exhibits no metal binding and has a small temperature dependent δpKa of -0.014/°C.

A zwitterionic N-substituted aminosulfonic acid buffer. Useful in the pH 6.8-8.2 range. Has a pK_a of 7.48 at 25°C.

Legal Information

ULTROL is a registered trademark of Merck KGaA, Darmstadt, Germany

CALBIOCHEM is a registered trademark of Merck KGaA, Darmstadt, Germany

Packaging

25 g in Plastic ampoule

5 kg in Fibre carton

100, 500 g in Glass bottle

1 kg in Glass bottle

Reconstitution

Following reconstitution, store at room temperature (20°C). Stock solutions are stable for up to 6 months at 20°C.

Warning

Toxicity: Irritant (B)

anion traces	chloride (Cl^-): ≤0.01%, sulfate (SO₄^2-): ≤0.05%
assay	≥99% dry basis (titration)
cation traces	heavy metals: ≤1 ppm, Na: ≤0.1%
color	white
form	crystalline powder
InChI key	JKMHFZQWWAIEOD-UHFFFAOYSA-N
InChI	1S/C8H18N2O4S/c11-7-5-9-1-3-10(4-2-9)6-8-15(12,13)14/h11H,1-8H2,(H,12,13,14)
manufacturer/tradename	Calbiochem^®
pKa (25 °C)	7.5
Quality Level	100
shipped in	ambient
SMILES string	OCCN1CCN(CC1)CCS(O)(=O)=O
solubility	water: 1 M
storage condition	OK to freeze
storage temp.	15-25°C
useful pH range	6.8-8.2