375368

HEPES

≥99% dry basis (titration), 1M solution, amniosulfonic acid buffer

• Synonym(s): HEPES, 4-(2-Hydroxyethyl)piperazine-1-ethanesulfonic acid, N-(2-Hydroxyethyl)piperazine-N′-(2-ethanesulfonic acid)
• Empirical Formula (Hill Notation): C₈H₁₈N₂O₄S
• CAS Number: 7365-45-9
• Molecular Weight: 238.30
• Beilstein/REAXYS Number: 883043
• MDL number: MFCD00006158
• UNSPSC Code: 12161700
• NACRES: NA.25

Properties

• product name: HEPES, ULTROL^® Grade, ≥99% dry basis (titration), 1M zwitterionic N-substituted aminosulfonic acid buffer
• Quality Level: 100
• assay: ≥99% dry basis (titration)
• form: solution
• manufacturer/tradename: Calbiochem^®
• storage condition: OK to freeze
• color: clear colorless
• useful pH range: 6.8-8.2
• pKa (25 °C): 7.5
• shipped in: ambient
• storage temp.: 15-25°C
• SMILES string: OCCN1CCN(CC1)CCS(O)(=O)=O
• 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)
• InChI key: JKMHFZQWWAIEOD-UHFFFAOYSA-N

Description

General description

A zwitterionic N-substituted aminosulfonic acid buffer absorbance: <0.05 at 260 nm, 1 M, H₂O; pK_a: 7.55 at 20°C). Active in the pH range of 6.0 to 8.5.

Warning

Toxicity: Standard Handling (A)

Physical form

1.0 M solution of Cat. No. 391338. Sterile-filtered.

Legal Information

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

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

Safety Information

• Storage Class: 13 - Non Combustible Solids
• wgk_germany: WGK 1
• flash_point_f: Not applicable
• flash_point_c: Not applicable