HEPES Free Acid
|Biochemicals||Storage: RTShipping: RT|
HEPES is a biological buffer (zwitterionic) designed by Good, et al., and typically referred to as Good’s buffer useful in cell culture media formulations. Selection of biological buffer systems should include the following criteria: exclusion by biological membranes, low absorption between 240 and 700nm, chemically stable, and stable to temperature and concentration changes.
Appearance: White, crystalline powder
Identity (IR): Conform to reference
Solubility: Colorless, clear, complete
pKa: 7.55 ± 0.2
Water (KF): 0.5%
Residue on Ignition: 0.5%
Heavy Metals: 0.001%
RNase, DNase, Protease: None Detected
Certificate of Origin: China
Important Note: This product as supplied is intended for research use only, not for use in human, therapeutic or diagnostic applications without the expressed written authorization of United States Biological.
1. Good, N. E., et al., Biochemistry 5:467 (1966)