ACES

Title: ACES
CAS Registry Number: 7365-82-4
CAS Name: 2-[(2-Amino-2-oxoethyl)amino]ethanesulfonic acid
Additional Names: N-(carbamoylmethyl)taurine; N-(2-acetamido)-2-aminoethanesulfonic acid
Molecular Formula: C4H10N2O4S
Molecular Weight: 182.20
Percent Composition: C 26.37%, H 5.53%, N 15.38%, O 35.12%, S 17.60%
Literature References: One of several zwitterionic N-substituted amino acids known as "Good" buffers. Active in pH range 6-8. Prepn: N. E. Good et al., Biochemistry 5, 467 (1966). Thermodynamic parameters: D. C. McGlothlin, J. Jordan, Anal. Lett. 9, 245 (1976). Metal complexation in solns: J. M. Pope et al., Anal. Biochem. 103, 214 (1980). Effect of temperature on pK values: R. N. Roy et al., J. Chem. Eng. Data 42, 41 (1997). Use as buffer in electrophoresis: D. J. Chappell, Clin. Chem. 31, 1384 (1985); Q. Liu et al., Anal. Biochem. 270, 112 (1999); in chromatography: Z. Yu, D. Westerlund, Chromatographia 44, 589 (1997).
Properties: Crystals from alcohol and water, dec 293°. pKa at 0.1M (0°): 7.32; (20°): 6.88; (37°): 6.56. DpKa/°C: -0.020.
pKa: pKa at 0.1M (0°): 7.32; (20°): 6.88; (37°): 6.56; pKa/°C: -0.020
Use: Buffer for biological systems.
Acesulfame Acetaldehyde Acetaldehyde Ammonia Acetaldehyde Sodium Bisulfite Acetaldoxime

An ace is a playing card.

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