Products > Optimize Reagents > Optimize – Buffers > HEPES Buffer
HEPES Buffer
Applications
- Crystallization grade HEPES buffer for formulating screens or for optimization
Features
- Sterile filtered
- Formulated in Type 1+ ultrapure water: 18.2 megaohm-cm resistivity at 25°C, < 5 ppb Total Organic Carbon, bacteria free (<1 Bacteria (CFU/ml)), pyrogen free (<0.03 Endotoxin (EU/ml)), RNase-free (< 0.01 ng/mL) and DNase-free (< 4 pg/µL)
Description
HEPES
Synonyms: 2-[4-(2-Hydroxyethyl)-1-piperazinyl]ethanesulfonic acid or 4-(2-Hydroxyethyl)piperazine-1-ethanesulfonic acid or N-(2-Hydroxyethyl)piperazine-N′-(2-ethanesulfonic acid)
C8H18N2O4S
Mr 238.31
CAS Number [7365-45-9]
EC Number 230-907-9
Beilstein Registry Number 883043
Merck 14,4654
RTECS TL6809000
MDL Number MFCD00006158
PubChem Substance ID 24895616
Purity ≥ 99.5%
pKa 7.5 at 25°C
Useful pH range of HEPES buffer 6.8 – 8.2
Titrate HR2-585 to the desired pH between 6.8 – 8.2 using NaOH
HR2-585 Measured pH Range: 5.4 – 5.5 at 25°C
HR2-585 Measured Conductivity Range: 160.1 – 236.9 μS/cm at 25°C
HR2-585 Measured Refractive Index Range: 1.37093 – 1.37131 at 20°C
HR2-785 is titrated to pH 7.0 using NaOH
HR2-785 Measured Conductivity Range: 5.8 – 7.0 mS/cm at 25°C
HR2-785 Measured Refractive Index Range: 1.37133 – 1.37176 at 20°C
HR2-729 is titrated to pH 7.5 using NaOH
HR2-729 Measured Conductivity Range: 11.6 – 13.6 mS/cm at 25°C
HR2-729 Measured Refractive Index Range: 1.37177 – 1.37290 at 20°C
Insoluble Matter 0.01% max
DNase None Detected
RNase None Detected
Protease None Detected
Heavy Metals 1 ppm max
As 5 ppm max
Cu 5 ppm max
Fe 5 ppm max
Pb 5 ppm max
SO4 0.005% max
用于配制筛网或优化的结晶级 HEPES 缓冲液
特征
无菌过滤
在 1+ 型超纯水中配制:25°C 时电阻率为 18.2 兆欧厘米,< 5 ppb 总有机碳,无细菌(<1 细菌(CFU/ml)),无热原(<0.03 内毒素(EU/ml)) , 无 RNase (< 0.01 ng/mL) 和无 DNase (< 4 pg/µL)
描述
HEPES
同义词:2-[4-(2-羟乙基)-1-哌嗪基]乙磺酸或4-(2-羟乙基)哌嗪-1-乙磺酸或N-(2-羟乙基)哌嗪-N’-(2-乙磺酸)酸)
C8H18N2O4S
238.31 先生
CAS 编号 [7365-45-9]
EC 编号 230-907-9
贝尔斯坦注册号 883043
默克 14,4654
RTECS TL6809000
MDL 编号 MFCD00006158
PubChem 物质 ID 24895616
纯度≥ 99.5%
25°C 时 pKa 7.5
HEPES 缓冲液的有用 pH 范围 6.8 – 8.2
使用 NaOH 将 HR2-585 滴定至所需的 pH 值介于 6.8 – 8.2 之间
HR2-585 测量的 pH 值范围:5.4 – 5.5 在 25°C
HR2-585 测量电导率范围:160.1 – 236.9 μS/cm at 25°C
HR2-585 测量的折射率范围:1.37093 – 1.37131 at 20°C
使用 NaOH 将 HR2-785 滴定至 pH 7.0
HR2-785 测得的电导率范围:5.8 – 7.0 mS/cm at 25°C
HR2-785 测量的折射率范围:1.37133 – 1.37176 at 20°C
使用 NaOH 将 HR2-729 滴定至 pH 7.5
HR2-729 测量电导率范围:11.6 – 13.6 mS/cm at 25°C
HR2-729 测量的折射率范围:1.37177 – 1.37290 at 20°C
不溶物 0.01% max
未检测到 DNase
未检测到 RNase
未检测到蛋白酶
重金属 最大 1 ppm
最大为 5 ppm
铜 5 ppm 最大值
Fe 5 ppm 最大值
铅 5 ppm 最大值
SO4 0.005% 最大
HR2-585
CAT NO
HR2-585
NAME
DESCRIPTION
100 mL
PRICE
$103.00
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CAT NO
HR2-785
NAME
DESCRIPTION
100 mL
PRICE
$103.00
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CAT NO
HR2-729
NAME
DESCRIPTION
100 mL
PRICE
$103.00
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Support Material(s)
Certificate Of Analysis
Related Item(S)
- Sodium hydroxide
- StockOptions Hepes Buffer Kit
- Individual StockOptions HEPES Reagents
References
1. Crystallization and preliminary X-ray crystallographic studies of native elastase from North Atlantic salmon (Salmo salar). Berglund, GI; Snalas, AO; Hansen, LK. Acta Crystallogr D 51, 393- 394, 1995.