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Novabiochem

Novagen

Calbiochem


391338  HEPES, Free Acid, ULTROL® Grade

N-2-Hydroxyethylpiperazine-N′-2-ethanesulfonic Acid

A zwitterionic N-substituted aminosulfonic acid buffer. Useful in the pH 6.8-8.2 range. Has a pKa of 7.48 at 25°C. Absorbance (1.0 M, H2O, 260 nm):≤0.05.
Product number Size Quantity Price
391338-100GM  100 gm  price on request 
391338-1KG  1 kg  price on request 
391338-25GM  25 gm  price on request 
391338-500GM  500 gm  price on request 
391338-5KG  5 kg  price on request 
Bulk available     Please request a quote
Alternatives
391333 HEPES, Sodium Salt, ULTROL® Grade 
391340 HEPES, Free Acid, Molecular Biology Grade 
375368 HEPES, Free Acid, ULTROL® Grade, 1 M Solution 
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Accessories for HEPES, Free Acid, ULTROL® Grade
Product information
Form White crystalline powder
Molar mass 238.3
Purity ≥99% by titration (dry basis)
Contaminants Chloride: ≤0.01%; Sodium: ≤0.1%; Sulfate: ≤0.05%
Heavy metals ≤1 ppm
PKA 7.25 - 7.75 at 20°C
Solubility Aqueous Basic Solutions or H2O
Chemical formula C8H18N2O4S
RTECS TL6809000
CAS number 7365-45-9
Merck USA index 14, 4654
Store and ship information
Storage +15°C to +30°C
Ship Ambient Temperature Only
Irritant
Safety information
S Phrase S: 26-37/39

In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.
R Phrase R: 36/37/38
HEPES, Free Acid, ULTROL<sup>®</sup> Grade, molecular structure

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