391338

HEPES

≥99% dry basis (titration), crystalline powder, amniosulfonic acid buffer

• 동의어(들): HEPES, N-2-Hydroxyethylpiperazine-Nʹ-2-ethanesulfonic Acid, 4-(2-Hydroxyethyl)piperazine-1-ethanesulfonic acid, N-(2-Hydroxyethyl)piperazine-N′-(2-ethanesulfonic acid)
• 실험식(Hill 표기법): C₈H₁₈N₂O₄S
• CAS Number: 7365-45-9
• Molecular Weight: 238.30
• Beilstein: 883043
• MDL number: MFCD00006158
• UNSPSC 코드: 12352106
• NACRES: NA.25

속성

• 제품명: HEPES, ULTROL^® Grade, ≥99% dry basis (titration), zwitterionic N-substituted aminosulfonic acid buffer
• 설명: Merck USA index - 14, 4654
• Quality Level: 100
• 분석: ≥99% dry basis (titration)
• 양식: crystalline powder
• 제조업체/상표: Calbiochem^®
• 저장 조건: OK to freeze
• 색상: white
• 유용한 pH 범위: 6.8-8.2
• pKa(25 °C): 7.5
• solubility: water: 1 M
• 음이온 미량물: chloride (Cl^-): ≤0.01%; sulfate (SO₄^2-): ≤0.05%
• 양이온 미량물: Na: ≤0.1%; heavy metals: ≤1 ppm
• 배송 상태: ambient
• 저장 온도: 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

설명

일반 설명

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.

Absorbance (1.0 M, H₂O, 260 nm):≤0.05.

Absorbance (1.0 M, H₂O, 280 nm): ≤0.04

경고

Toxicity: Irritant (B)

재구성

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

법적 정보

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

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

안전성 정보

• Storage Class Code: 13 - Non Combustible Solids
• WGK: WGK 1
• Flash Point (°F): Not applicable
• Flash Point (°C): Not applicable