Title: CHES
CAS Registry Number: 103-47-9
CAS Name: 2-(Cyclohexylamino)ethanesulfonic acid
Additional Names: N-cyclohexyltaurine
Molecular Formula: C8H17NO3S
Molecular Weight: 207.29
Percent Composition: C 46.35%, H 8.27%, N 6.76%, O 23.16%, S 15.47%
Literature References: Zwitterionic N-substituted aminosulfonic acid in the style of the "Good" buffers; active in the pH range 8.6-10.0. Synthesis: A. Champseix et al., Bull. Soc. Chim. Fr. 1985, 463. Effects of freezing on buffering: D. L. Williams-Smith et al., Biochem. J. 167, 593 (1977). Effects on Lowry protein assay: C. Cookson, Anal. Biochem. 88, 340 (1978). Dissociation constants and buffering capacity: M. J. Taylor, Y. Pignat, Cryobiology 19, 99 (1982). Use as buffer: M. G. N. Hartmanis, T. C. Stadtman, Proc. Natl. Acad. Sci. USA 84, 76 (1987); C. Engstrand et al., Biochim. Biophys. Acta 1122, 321 (1992).
Properties: Crystals, mp 320°. pKa in water (25°) 9.27 ±0.01; in 20% (w/w) DMSO (25°) 9.10, (0°) 9.76, (-5.5°) 10.01; in 30% (w/w) DMSO (25°) 9.11, (0°) 9.89, (-12°) 10.27.
Melting point: mp 320°
pKa: pKa in water (25°) 9.27 ±0.01; in 20% (w/w) DMSO (25°) 9.10, (0°) 9.76, (-5.5°) 10.01; in 30% (w/w) DMSO (25°) 9.11, (0°) 9.89, (-12°) 10.27
Use: Biological buffer.
Chimaphilin Chimonanthine Chimyl Alcohol Chinese Wax Chirald

Workshop on Cryptographic Hardware and Embedded Systems (CHES) is a workshop for cryptography research, focusing on the implementation of cryptographic algorithm. The two general areas treated are the efficient and the secure implementation of algorithms. Related topics such as random number generators or special-purpose cryptanalytical machines are also commonly covered at the workshop. CHES is sponsored by the International Association for Cryptologic Research. It was first held in Worcester, Massachusetts in 1999 at Worcester Polytechnic Institute. It was founded by Çetin Kaya Koç and Christof Paar. CHES 2000 was also held at WPI; after that, the conference has been held at various locations worldwide, including in chronological order Paris, Cologne, Edinburgh, San Francisco, Yokohama, Vienna, Washington, D.C., Lausanne, Santa Barbara, California and Nara. In the last few years, CHES has grown to more than 300 participants, becoming one of the larger events in the academic cryptography community.