Title:
SINGLE CRYSTALLINE DL-CYSTEINE AND PROCESS FOR THEIR PREPARATION
Document Type and Number:
WIPO Patent Application WO/1984/000543
Kind Code:
A1
Abstract:
Single crystalline DL-cysteine characterized by the X-ray diffraction spectrum wherein strong reflection lines appear at the following latice spacings are novel crystals showing excellent storage stability.$(15,)$("f" in the column of relative intensity (I) means a strong spectral intensity, and "ff" an extremely strong intensity). The single crystalline DL-cysteine is prepared by neutralizing an aromatic sulfonate or hydrochloride of DL-cysteine with a base in a mixed solvent composed of water and an organic solvent selected from lower alcohols and cellosolves.
Inventors:
MITA RYUICHI (JP)
KATOH TOSHIO (JP)
HIGUCHI CHOJIRO (JP)
YAMAGUCHI AKIHIRO (JP)
OHOKA MASAHARU (JP)
KATOH TOSHIO (JP)
HIGUCHI CHOJIRO (JP)
YAMAGUCHI AKIHIRO (JP)
OHOKA MASAHARU (JP)
Application Number:
PCT/JP1983/000241
Publication Date:
February 16, 1984
Filing Date:
July 26, 1983
Export Citation:
Assignee:
MITSUI TOATSU CHEMICALS (JP)
International Classes:
C07C323/58; C07C67/00; C07C313/00; C30B29/54; (IPC1-7): C07C149/247; C07C148/04
Other References:
No relevant documents have been disclosed
See also references of EP 0115539A4
See also references of EP 0115539A4
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